Eruptive vellus hair cyst and steatocystoma multiplex are infrequent lesions. Although there are clinical similarities between both entities, histologic features are distinctive. Especially noteworthy is the presence of sebaceous glands within the cyst wall of steatocystoma. We describe herein a patient with a familial monomorphous papular eruption on the forehead, biopsies from which showed features of both eruptive vellus hair cyst and steatocystoma multiplex.

Summary Five patients with dyskeratosis congenita arc described. The cytogenetic studies showed varying frequencies of chromosomal abnormalities which included gaps, chromatid breaks and pulverizations, ranging from 4 to 22%. These findings suggest that chromosomal breakage may be of fundamental importance in the etiology of dyskeratosis congenita and it could represent a genetic marker for the disease.