Malignant Transformation of Multiple Dermal Cylindromas

Cylindromas are benign tumors appearing as small solitary slow growing nodules on the headand neck. multiple cylindromas may form a turban tumor. here, we report an unusual case ofmultiple cylindroma with transformation to cylindrocarcinoma. the patient is a 61-year-oldwoman 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.