[Pilomatrixoma (Malherbe's calcifying epithelioma). Apropos of 13 cases observed in 6 years].

Thirteen pilomatrixomas were seen over a six year period. These small benign cutaneous tumors are infrequent though not exceptional and occur mainly in children (mean age six years). The tumor's hard consistency, irregular shape and frequently cephalic location (nearly 50% of cases) are suggestive.