A neoplasm arising from totipotential cells is a/an
hamartoma
teratoma
embryonal tumor
mixed tumor
choristoma
Leiomyomas of the uterus are characterized microscopically by each of the
following EXCEPT...
high mitotic activity
histologically, a monoclonal proliferation of smooth muscle cells occurs.
bundles of smooth muscle cells arranged in whorls
cells of uniform size and shape
spindle-shaped cells with oval nuclei
abundant stromal collagen in many cases
If nonfatal, a massive myocardial infarct would be expected to...
heal by resolution
heal by regeneration
heal by scarring
form a chronic abscess
form a fluid-filled cyst
The following is true of malignant cells EXCEPT:
They are often aneuploid
Nuclear/cytoplasmic ratio is increased
They may have abnormal mitoses
They may have prominent nucleoli
They are invariably associated with chromosomal translocations
Which of the following epithelial changes is most likely to be associated with
malignant changes?
acanthosis
hyperkeratosis
parakeratosis
dyskeratosis
acantholysis
Diffuse intramural spread with extensive fibroblastic thickening is a morphologic
pattern most characteristically associated with carcinoma of...
esophagus
stomach
small intestine
appendix
colon
When applied to malignant neoplasms, the term anaplastic refers to the...
grade
stage
both
neither
A malignant neoplasm of epithelial origin is a/an...
adenoma
carcinoma
lymphoma
sarcoma
teratoma
Kaposi"s sarcoma is a neoplasm predominantly composed of which type of
tissue elements?
epithelial
hematopoietic
muscular
neural
vascular
A 54-year-old healthy man with no prior major illnesses has a fecal occult blood
test performed as part of a routine physical examination. The test is positive. He
is referred to a gastroenterologist who performs a colonoscopy and finds a
solitary 1.5 cm pedunculated mass on a narrow stalk that is located at the splenic
flexure. The mass is snared off and sent to surgical pathology. Which of the
following statements regarding these findings is most appropriate?
He has inherited a faulty APC gene
Histologically the mass is probably a leiomyosarcoma
This is a metastasis from a bronchogenic carcinoma
He is unlikely to die from this lesion
He should have consumed a glass of red wine each day
The development of a tumor in humans or animals may be influenced by...
Genetic predisposition
Chronic exposure to toxic chemicals
Cigarette smoking
Chromosomal aberrations
All of the above
Leiomyomas arise from...
adipose tissue
nerve sheath
columnar epithelium
smooth muscle
brain