[CANCER RESEARCH 41, 11 71-1179, 0008-5472/81 /0041-OOOOS02.00 March 1981 ) Use of Multiparameter Studies and Scanning Electron Microscopy in the Interpretation and Attempted Correlation of Surface Morphology with Cell Type in 135 Cases of Human Leukemias1 Aaron Polliack, Mirón Prokocimer, Haim Gamliel Reuven Or, Aviva Korkesh, Rachel Leizerowitz, Department of Hematology, Hadassah University Hospital, and Hebrew University-Hadassah ABSTRACT Multiparameter studies and scanning electron microscopy (SEM) were performed on cells obtained from 135 cases of leukemia in an attempt to clarify whether there was a reliable correlation between surface morphology and cell type as de fined by cytochemistry, membrane markers, and transmission electron microscopy. These studies also attempted to deter mine whether SEM could be used to distinguish lymphoid and nonlymphoid leukemias, to recognize different types of lym phoid leukemia, and to define the cell type involved in cases of unclassified leukemia. The results of this study suggest that there is a good correlation between surface morphology as seen by SEM and cell type identified by multiparameter tech niques. In most cases, nonlymphoid leukemic cells could be distinguished from lymphoid leukemic cells on the basis of their surface morphology. SEM did not appear to contribute to the diagnosis of unclassified leukemia, but more cases of this nature must be studied. Despite the fact that acute lymphoblastic leukemia cells frequently showed fewer microvilli than did other lymphoid leukemias, overlap of surface features in about one-third of the cases did not enable SEM to be used as a reliable means of distinction. The above conclusions appear to be supported by preliminary scanning immunoelectron mi croscopic observations on leukemic cells. It is concluded that SEM is a useful aid to other modes of microscopy in leukemia but should not be used on its own to establish diagnosis. Hannah Ben-Bassat, and Medical School, Jerusalem, Israel features of normal circulating lymphocytes, the results of other SEM studies in leukemia have shown that it is frequently possible to distinguish lymphoid from other nonlymphoid leu kemias on the basis of cell surface architecture (11-13, 31, 32, 35, 40). These studies have succeeded in defining the spectrum of surface morphology seen in a variety of leukemic cells and demonstrated that certain cell types display a con sistent surface morphology irrespective of their mode of prep aration for SEM. During the past 3 years, we have examined cells from an additional 135 cases of leukemia which had been accurately classified, prior to SEM examination, in an attempt to establish whether this mode of microscopy can be used as a useful adjunct to other methods of microscopy in the diagnosis of the leukemic cell type. The present study attempted to answer the following questions: (a) is there a reliable correlation between the surface architecture of leukemic cells as seen by SEM and the cell type as defined by other multiparameter studies? (b) can SEM be used to distinguish lymphoid and nonlymphoid leukemias? and (c) can it contribute to definition of the cell type in AUL and subtypes of ALL? The results of this study indicate that, in the vast majority of leukemias studied by SEM, cell surface features served as a reliable indicator of a given cell type. However, SEM could not reliably distinguish subtypes of ALL, nor did it contribute to defining the cell type involved in AUL. MATERIALS AND METHODS INTRODUCTION In recent years, the SEM2 has been used to study the surface architecture of a variety of normal and leukemic cells (13, 29, 33, 35, 39, 43, 49). Despite controversial results relating to the recognition of different lymphocyte types (1, 29, 33, 39, 45) and occasional overlap of surface features, it has become apparent that it is often possible to distinguish lymphoid cells from other leukocytes using the SEM (13, 33, 36). Controver sial findings regarding lymphocyte surface morphology in the past were in part due to the different preparatory techniques used (1) and to comparisons of lymphocytes obtained from different sources (48). However, while controversy existed concerning the SEM 1 This paper is dedicated Cells were isolated from the peripheral blood of 135 patients in whom more than 60% of leukemic cells were present in the peripheral blood. The following methods were used. Light Microscopy Morphology and Cell Isolation All peripheral blood and bone marrow smears were stained with May-Griinwald-Giemsa. In cases with high WBC, buffy coat preparations were prepared from heparinized venous blood; while in patients with lower counts, cells were concen trated using the Ficoll-Hypaque gradient centrifugation tech nique (9). Cells were washed with PBS (contents in stock solution, 5000 ml: 8.6 g KH2PO4, 48.0 g Na2HPO„,25.0 g NaCI, 4500 ce distilled H2O, pH 7.4), and the suspension was adjusted to 4 to 106 x 106 cells/ml with PBS. to the memory of Professor Gabi Izak, who died suddenly on March 9, 1980. 2 The abbreviations used are: SEM, scanning electron microscopy; AUL. acute Cytochemistry unclassified (undifferentiated) leukemia; ALL. acute lymphoblastic leukemia; PAS, periodic acid-Schiff; TEM, transmission electron microscopy; CLL, chronic lymphocytic leukemia; PLL. prolymphocytic leukemia; PBS, phosphate-buffered saline. Received August 25. 1980; accepted November 7. 1980. The following reactions were determined and examined by light microscopy: peroxidase, Sudan black, PAS (20), a-naphthyl-acetate esterase with and without fluoride inhibition, AS-D MARCH 1981 Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research. 1171 A. Polliack et al. chloroacetate esterase (50), and acid phosphatase (5). Oil red O (7), /S-glucuronidase (17), and muramidase (24) stains were not performed in all instances. Except for some cases in which platelet peroxidase (10) was done, ultrastructural cytochemis try was not performed. Biochemical Markers The following tests were useful in aiding to establish specific diagnoses in some cases: serum levels of lysozyme (34); vitamin B12-binding proteins (42); lactic dehydrogenase (27); and terminal deoxynucleotidyl transferase (21). Membrane Markers Classification of Leukemias Prior to SEM Examination The following resetting tests were performed on buffy coat suspensions or mononuclear cell suspensions isolated after density gradient centrifugation: sheep erythrocytes (23); erythrocyte-antibody complement rosettes (22); and erythrocyteantibody (IgG)-ox rosettes (51 ). Surface immunoglobulins were detected with polyvalent and monovalent antisera conjugated with fluorescein (26) after cells were preincubated in medium for at least 2 hr at 37°. Anti-T and anti-common type ALL antisera (kindly provided by Dr. H. Rodt, Munich, West Ger many, and Dr. M. Greaves, London, England) were also used in selected cases. Transmission Electron Microscopy In many cases, concentrated cells were washed in PBS and fixed in suspension with 2% phosphate-buffered glutaraldehyde. Cells were then washed, postfixed in 2% osmium tetroxide, dehydrated, and embedded in low-viscosity epoxy resin embedding medium (46). Ultrathin sections stained with uranyl acetate and lead citrate were viewed with a Phillips electron microscope. When performed, cytochemistry for platelet per oxidase was done according to the technique of Breton-Gorius era/. (10). Scanning Electron Microscopy Cells were fixed in suspension with 1% phosphate-buffered glutaraldehyde for at least 1 hr (pH 7.4, 280 to 330 mosmol). Thereafter, cells were collected onto poly-L-lysine-coated coverslips, fixed overnight in 1% glutaraldehyde, washed briefly, dehydrated in a graded series of ethanol-Freon 113, and critical-point dried using Freon 13. Coverslips were then sputter coated with a thin layer of gold-palladium and stuck onto aluminum stubs with double-sided sticky tape and silver paint. Samples were stored under vacuum until examination in a JEOL x 35 SEM equipped with a LAB-6 gun, at an acceler ating voltage of 35 to 39 kV. At least 200 cells were counted in each sample. These cases were classified according to the dominant cell type present (i.e., more than 60%) and according to the most frequent type of microprojection encountered (ruf fles, ridge-like profiles, microvilli, blebs). In cases of lymphoid leukemia, attempts were made to assess the number of micro villi present. In some of our later cases, scanning immunoelectron microscopy was performed by a modification of the tech nique described by Avrameas (3) and Kumon (28) using a microlatex sphere which had been conjugated to a specific antibody against a membrane receptor (anti-common type ALL, anti-T-antigen, anti-surface ¡mmunoglobulin) using glutaralde hyde. Further details of this technique are provided in more detail in a separate publication.3 ' H. Gamliel and A. Polliack. Positive identification using scanning immunoelectron 1172 microscopy, of human leukemic cells submitted for publication. The 135 cases were classified into the following categories (summarized in Table 1). Nonlymphoblastic Leukemias These were diagnosed when cells were peroxidase, ester ase, Sudan black, or muramidase positive while PAS, paranuclear acid phosphatase, and /8-glucuronidase tests were neg ative. Serum lysozyme and vitamin B12binders were sometimes elevated, while lactic dehydrogenase levels were generally normal or only modestly elevated (27). In general, B- and Tlymphocyte markers were not detected on these cells. In some cases, TEM contributed when granules were seen and megakaryoblastic leukemia was diagnosed if cells contained platelet peroxidase in the nuclear membrane and/or endoplasmic reticulum. All cases of chronic granulocytic leukemia examined were Philadelphia chromosome positive. Lymphoid Leukemias ALL. Cells were negative for peroxidase, Sudan black, es terases, and muramidase but positive, in some cases, for PAS, paranuclear acid phosphatase, and /8-glucuronidase and, rarely, for oil red O. Serum lysozyme and vitamin B12-binding proteins were usually within normal limits, while in many cases lactic dehydrogenase levels were markedly elevated (27). fior T-type ALL surface markers were present in some cases. CLL. CLL was diagnosed by classical clinical criteria and by the presence of absolute lymphocytosis in the peripheral blood. All cases were of the B-type and none were T-derived. Cyto chemistry was usually negative for all stains. Lymphoma in Leukemic Phase. All cases developed in patients with non-Hodgkin's lymphoma who developed leuke mia in the course of their disease. Of the 11 cases, 7 were diffuse lymphomas and 4 were follicular in type. Seven were classified as poorly differentiated lymphocytic (5 had B-cell markers; 2 were T-cell lymphomas), one case was diffuse "histiocytic" B-type lymphoma, and 3 cases were mixed lym phocytic and "histiocytic" B-type lymphomas. Table 1 Classification of 135 cases of leukemia using multiparameter Type of leukemia studies No. of cases Nonlymphoblastic leukemias Acute myelo- or monocytic (M1-M4)" Acute monoblastic (M5)a 46 34 Chronic granulocytic Lymphocytic-lymphoblastic ALL (L1 -L3)a 6 87 26 6 leukemia 50 11 2 135 CLL Lymphoma in leukemic phase Unclassified-"undifferentiated" leukemias Total " FAB classification [Bennett et al. (6)]. CANCER RESEARCH VOL. 41 Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research. SEM and Leukemia Acute Unclassified or Undifferentiated Leukemia When the above-mentioned tests were essentially inconclu sive or less than 10% enzyme-positive blasts were found on cytochemistry, cases were classified as AUL. In the 2 cases encountered, TEM did not contribute; however, ultrastructural cytochemistry was not performed, nor were terminal deoxynucleotidyl transferase levels available in these 2 patients. RESULTS Table 2 Surface markers and morphology SEM features typical for mature granulocytes Mostly non-B non-T or T-derived ALL T-derived ALL T-derived ALL B-derived ALL (Burkitt's 20 leuke mia) 26 Table 3 SEM and cell origin of lymphoma in leukemic phase Nonlymphoid Leukemias Of the 46 proven cases, 44 patients had a majority of cells displaying ridge-like profiles and ruffles (Figs. 1 to 4). Monoblasts and monocytes had prominent ruffles, while myeloblasts and maturing myeloid cells had more raised transverse ridgelike profiles. The immature cells [e.g., M1 of the FAB classifi cation (6)] had relatively smooth surfaces with underdeveloped microprojections (Fig. 5) which were invariably ridge-like proc esses. Cells bearing microvilli were seen, but these never constituted the majority. The 2 remaining cases showed cells with typical myeloid features, but many displayed large, irreg ular blebs and pseudopodia of varying size (Fig. 6), which have until now not been described in acute myeloblastic leukemia. The latter 2 cases were shown to be predominantly megakaryoblastic by means of cytochemical and ultrastructural studies, and cells contained the platelet peroxidase. Subsequently, we have examined yet another case of this type with similar fea tures under the SEM. All cases of chronic granulocytic leuke mia had cells with raised well-developed ridge-like profiles, No. of cases Cell origin Smooth with relatively few micro villi (Fig. 7) Smooth with ridge-like profiles (Fig. 9) Moderately villous (Fig. 8) Moderate to markedly villous (Fig. 10) Total no. of cases SEM Results and Attempted Correlation between SEM and Other Multiparameter Studies in 26 cases of ALL of originB-typeT-typeB-typeB-typeT-typeType lymphomaLymphocytic-lymphoblasticLymphoblast of cases5131111Cell featuresVillous SEM surfacesCells lymphomaMixed lymphocytic "histio cytic"Diffuse "histiocytic"Lymphoblastic andcells with villous surfaces rufflesSmoother with ridge-likesurfaces with profilesTotal no. of casesNo. lymphoma Table 4 SEM features of B-type CLL ofcases32143150% ofcases642862100 Predominantly villousMixed cellsPredominantly villous and smoother smooth (with few micro villi)Ridge-like profilesTotal no. of casesNo. (Fig. 2). Lymphoid Leukemias ALL. In 23 of the 26 cases, cells were found which displayed relatively smooth but sometimes undulating surfaces (Fig. 7) with varying numbers of short microvilli (Fig. 8). In 20 cases, cells with very few microvilli dominated. These cases were all either T-ALL or non-B non-T-ALL. In another 2 cases of pre-TALL (with no erythrocyte-rosetting cells or T-cell markers but paranuclear acid phosphatase), moderate numbers of microvilli were seen; while in 2 additional cases of T-ALL, spherical cells showing undulating surfaces predominated, and a proportion of cells had peripheral ridge-like profiles (Fig. 9). In the only 2 cases of B-ALL, both examples of Burkitt's lymphoma cell leukemia, were cells with more villous surfaces evident (Fig. 10). Results are summarized in Table 2. Lymphoma with Leukemic Phase. Five of the 11 cases showed predominantly villous lymphocytes, and all these pa tients had B-type disease (Fig. 11). Of the 2 patients with Ttype lymphoblastic lymphoma with leukemia, one had a majority of moderately villous cells, while the other had a majority of cells with irregular surfaces and ridge-like profiles (similar to those seen in the 2 cases of pre-T-ALL described earlier). Of the 4 remaining cases of lymphoma with leukemic phase in patients with either mixed lymphocytic and "histiocytic" lym phoma (B-type) or diffuse "histiocytic" lymphoma (B-type), a majority of cells were of the villous type, but an admixture of larger cells with well-developed ruffles (presumably "so-called histiocytes"), were also seen (Fig. 12). Results are summarized in Table 3. CLL (Figs. 13 to 16). All these cases were B-type, and 32 of the 50 (64%) had more than 60% of cells with villous surfaces (Fig. 13). A proportion of smoother cells with less microvilli and others with raised ridge-like profiles were always seen. Four teen cases (28%) had an even mixture of cells which were either moderately villous or relatively smooth with few microvilli (Fig. 14). Three cases (6%) had more than 50% of cells with very few microvilli (Fig. 15), while one case (2%) showed a majority of cells with irregular surfaces and some ridge-like profiles (Fig. 16). Results are summarized in Table 4. In summary, 83 of the 87 cases of lymphoid leukemia showed a majority of cells which had surface features associated with lymphocytes (i.e., microvilli). A smaller number of cases showed cells which displayed ridge-like profiles, but these were the dominant cell type in only 4 cases. The overwhelming majority of null and T-type ALL cells had few microvilli, while B-cell neoplasias showed a wider spectrum of surface mor phology ranging from villous to smooth. AUL. These 2 cases defied more accurate diagnosis, and unfortunately ultrastructural cytochemistry and terminal deoxynucleotidyl transferase levels were unavailable. Both cases were probably early myeloblastic [M1 by the FAB classification (6)] because the cells lacked lymphoid markers and 5 to 8% of them were Sudan black and/or peroxidase positive. However, TEM was noncontributory. The SEM diagnosis may also have MARCH 1981 Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research. 1173 A. Polliack et al. been compatible with M1-type leukemia because of the pres ence of some short underdeveloped ridge-like profiles on a proportion of the cells. However, the majority of cells were smooth and lacked microprojections, making final diagnosis indefinite (Figs. 17 and 18). Summary of Cases with Difficult Correlation Of the 135 cases examined, only 8 provided difficulties in interpretation and attempted correlation. Two cases of acute myeloblastic leukemia had cells with irregular blebs, but these cases were later shown to be megakaryoblastic. In 2 cases of T-ALL, one patient with T-derived lymphoma with leukemic phase, and one case of B-CLL, cells had undulating surfaces with raised ridge-like profiles and would probably have been misdiagnosed as nonlymphoid by SEM alone. In both cases of AUL, SEM could not contribute to a more definitive diagnosis. Thus, of the 8 cases, SEM may have been misleading in only 4 cases; in 2 others, it was inconclusive. Scanning Immune-electron Microscopy Preliminary results, to be published in detail in a separate publication,3 tend to support the above-described SEM data. Positive identification of cells using immunolabeled latex spheres confirmed the differences described in surface mor phology of lymphoid and nonlymphoid leukemias. Represent ative samples are illustrated in Figs. 19 to 24. DISCUSSION The results of the present study confirm the initial impres sions obtained from a variety of earlier SEM reports on leu kemic cells which had mostly not been classified by as many multiparameter studies as in the present study. In over 90% of the cases examined, there was a good correlation between the surface morphology, as seen by SEM, and the light microscopic diagnosis of the respective cell type. Only 8 cases provided difficulties in correlation; retrospectively, SEM may have been misleading in only 4 instances, all of which were lymphoid leukemias. In these cases, the SEM features, considered on their own, may have led to incorrect diagnoses because of the presence of ridge-like profiles (features most frequently asso ciated with nonlymphoid cells) on cells from 4 obvious cases of lymphocytic leukemia. However, with more experience, it may indeed be possible to define these cases as lymphoid in the light of data indicating that a proportion of thymic lymphocytes may have undulated "ridged" surface profiles (8, 44). In fact, the latter features may be indicative of a subpopulation of lymphocytes as suggested by other workers (25). This type of surface morphology may differ slightly from that recorded for myeloid cells, which display less undulation and more obviously raised transverse ridges over the entire cell surface. This subgroup of leukemias is currently under investigation; hope fully, it will be possible to distinguish them from nonlymphoid leukemias with greater ease in the future. It is worthwhile to stress that none of the cases of proven nonlymphoid leukemia provided difficulties in classification by SEM. In the 2 cases which were problematic were cells with unusual blebs and long pseudopodia; retrospectively, they may 1174 have showed what may be the characteristic features of the megakaryocytic cell series. SEM findings were disappointingly inconclusive in the 2 cases of AUL examined, and more cases of this nature must be studied in the future. Of the 87 cases of lymphoid leukemia, 83 had cells with the typical surface features described for lymphocytes by SEM (13, 16, 33, 41). As in earlier studies (12, 13, 32, 35, 37), non-B non-T- and T-derived ALL cells characteristically showed relatively smooth surfaces, while B-lymphoid cells had a broader spectrum of surface morphology and a wider variation in the number of microvilli. Recently, it has become evident that CLL may be a more heterogeneous group of disorders than originally thought; cases of PLL and CLL with "prolymphocytoid" transformation (14, 18) have until now been included in most series of CLL studied by SEM. It is possible that the PLL and transforming CLL cells have surface features different from those of regular B-type CLL cells; further SEM studies of these subgroups may provide interesting information on the hetero geneity of CLL cell surface morphology as seen by SEM. Earlier SEM studies have suggested that there may well be major differences of cell surface morphology in CLL and ALL (13, 16, 33, 41). However, the presence of appreciable num bers of smoother lymphocytes in close to one-third of the cases of CLL suggests that SEM cannot consistently distinguish Band T-cell leukemias. Accordingly, SEM should not be used as a means to establish lymphocyte derivation. Scanning immunoelectron microscopy3 and a study of a larger number of cultured ALL and lymphoma cell lines tend to confirm the above conclusions.4 The frequent differences between ALL and CLL cells noted by SEM may well reflect differences in maturation (32), with less mature cells showing fewer microvilli than do more mature cells. This is also true for precursor cells of the myeloid cell series, which also show fewer microprojections than do their more mature counterparts (2). On the other hand, the differences recorded may also reflect variations in recir culation and homing patterns in these 2 lymphoid populations, as encountered in the murine system (48). Future SEM and scanning immunoelectron microscopic studies of PLL, CLL with "prolymphocytoid" transformation, and thymic lympho cyte subpopulations may well provide further important infor mation in this respect. Lastly, there is no doubt today that microvilli are extremely labile structures, modulated by a variety of physiological and microenvironmental factors which may result in their rapid redistribution on the cell surface. Microvilli redistribute in re sponse to a wide variety of factors such as antigenic stimulation (30), intercellular contact (29, 38), and spreading (15, 19). They are also influenced by variations in preparatory tech niques (17) and alterations in the osmolality of the buffer vehicle used in the fixative (4). All of these considerations make it difficult to rely upon the presence or absence of microvilli as a consistent means of distinguishing lymphocyte subtypes. Nevertheless, while all of the above is true, it is of interest to note that other types of microprojections, such as ruffles and ridge-like profiles, seem to be more stable and are consistently encountered in nonlymphoid cells irrespective of their mode of preparation for SEM. " A. Polliack, H. Gamliel, H. Ben Bassat, A. Korkesh, R. Leizerowitz, Minowada. Surface morphology and membrane phenotype leukemia-lymphoma cells, submitted for publication. CANCER and J. of cultured human RESEARCH VOL. Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research. 41 "'W SEM and Leukemia REFERENCES 1. Alexander, E. L., and Wetzel, B. Human lymphocytes: similarity of B and T cells surface morphology. Science (Wash. D.C.), 188: 732-734, 1975. 2. Allen, T. D., and Dexter, T. M. Surface morphology and ultrastructure of murine granulocytes and monocytes in long term liquid culture. Blood Cells, 2: 591-606, 1976. 3. Avrameas. S. Coupling of enzymes to proteins with glutaraldehyde. Immunochemistry. 6. 43-52. 1969. 4. Barber, T. A., and Burkholder, P. M. Relation of surface and internal ultrastructure of thymus and bone marrow derived lymphocytes to specimen preparatory technique. In: O. Johari, (ed.). 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Pathol.. 55: 283-286, 1971. 51. Yoshida, T., and Andersson, B. Evidence for a receptor recognizing antigen complexed immunoglobulin on the surface of activated mouse thymus lym phocytes. Scand. J. Immunol., /: 401-408, 1972. 1981 Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research. 1175 A. Polliack et al. Fig 1 Cells from a patient with acute myeloblastic leukemia showing typical ridge-like processes and ruffles, x 8,700. Fig. 2. Myeloid cells from a patient with chronic granulocytic leukemia with transverse ridge-like profiles, x 7,300. Fig. 3. Cells from a patient with monoblastic leukemia with prominent surface ruffles, x 6,600. Fig. 4. Cells from a patient with Mi-type early myeloblastic leukemia showing relatively smooth surfaces with slightly raised transverse ridges, x 6,600. Fig. 5. Close-up of one of these cells showing very few microprojections resembling early ridge-like profiles, x 11,000. Fig. 6. Cell from a patient with megakaryoblastic 1176 leukemia showing surface blebs and elongated pseudopodia. x 9,700. CANCER RESEARCH VOL. 41 Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research. SEM and Leukemia Fig. 7. Cells proma I . surfaces and no microprojections. X 5,700. Fig. 8. Cells from a patient with null-type ALL with small number of short microvilli. x 6,000. Fig. 9. Cells from a patient with T-type ALL showing irregular surfaces with a few microprojections. Underdeveloped ridge-like profiles are seen at the cell periphery. x 6,600. Fig. 10. B-type ALL cells with varying numbers of short microvilli. x 7,200. Fig. 11. Leukemic cells from a patient with B-type poorly differentiated lymphocytic lymphoma, with villous surfaces. x 7,600. Fig. 12. Leukemic cells from a patient with B-type mixed lymphocytic-histiocytic lymphoma. Note upper cell with transverse ridges and ruffles and lower cell with multiple microvilli. x 6,000. MARCH 1981 Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research. 1177 A. Polliack et al. Fig 13. Two typical villous B-type CLL cells, x 9,500. Fig. 14. B-type CLL cells with varying numbers of microvilli. x 6.800. Fig 15. Cells from a case of B-type CLL, in which most cells displayed relatively smooth surfaces, x 5,300. Fig. 16. Cells from a case of B-type CLL in which most of the cells had irregular surfaces and some ridge-like profiles, x 6,400. Fig. 17. Cells from a patient with AUL showing relatively smooth undulating surfaces with underdeveloped microprojections, resembling 6.500. Fig. 18. Two cells from a patient with AUL showing smooth surfaces and some short stubby microvilli. 1178 ridge-like profiles, x x 7,800. CANCER RESEARCH VOL. 41 Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research. @ @;@:- ,@ 19 , 20 . -ON 21 22 @,s8'. ,..e.@,& Ti' 24 23 -. . (I @1 41 Fig. 19. T-type ALL cells positively labeled with anti T-immunolatex. x 7,300. Fig. 20. Smooth-surfaced ALL cells unlabeled with anti-B (surface immunoglobulin)-immunolatex. Note the well-preserved discocyte in the center. Small latex particles are seen between the cells on the substrate. x 3,400. Fig. 21 . Three B-type lymphoma cells with microvilli. Cells were incubated with anti-T-immunolatex. The latex conjugate is seen on substrate surrounding the cells. x 3,300. Fig. 22. B-type lymphoma cells positively labeled with anti-B (surface immunoglobulin)-immunolatex. x 3,300. Fig. 23. Myeloblasts with transverse ridge-like profiles unlabeled with anti-T-immunolatex. The rounded cell with a few microvilli (lower right) is labeled with the anti-T-immunolatex and is probably a T-lymphocyte. x 4,100. Fig. 24. Rounded myeloblasts with relatively smooth surfaces and transverse ridge-like profiles which are unlabeled with anti-B (surface immunoglobulin) Immunolatex. x 4,500. 1179 Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research. Use of Multiparameter Studies and Scanning Electron Microscopy in the Interpretation and Attempted Correlation of Surface Morphology with Cell Type in 135 Cases of Human Leukemias Aaron Polliack, Miron Prokocimer, Reuven Or, et al. Cancer Res 1981;41:1171-1179. Updated version E-mail alerts Reprints and Subscriptions Permissions Access the most recent version of this article at: http://cancerres.aacrjournals.org/content/41/3/1171 Sign up to receive free email-alerts related to this article or journal. To order reprints of this article or to subscribe to the journal, contact the AACR Publications Department at [email protected]. To request permission to re-use all or part of this article, contact the AACR Publications Department at [email protected]. Downloaded from cancerres.aacrjournals.org on July 31, 2017. © 1981 American Association for Cancer Research.
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