110 patients with at least 2 neurofibromas
(331 cutaneous lesions)
11 probands fullfilled the clinical NF1 criteria
99 patients were considered sporadic
(95 familial members)
(absence of additional NF1-criteria).
7 of 11 probands presented NF1 germline mutations
2 NF1 patients not tested
2 NF1 proband under investigation