Malignant transformation of multiple dermal cylindromas

Cylindromas are benign tumors appearing as small solitary slow growing nodules on the head and neck. Multiple cylindromas may form a turban tumor. Here, we report an unusual case of multiple cylindroma with transformation to cylindrocarcinoma. The patient is a 61-year-old woman who developed a cylindrocarcinoma on a pre-existing cylindroma of head and neck, with deformity of head due to soft tissue masses, lytic lesions of scalp with invasion to brain, and destruction of orbit leading to unilateral visual loss