Fig. 3
From: Identification of KRAS mutation in a patient with linear nevus sebaceous syndrome: a case report
a H&E staining of skin lesions in the head and face reveals epidermal hyperkeratosis, acanthosis, and papillomatous hyperplasia in the epidermis, numerous mature/nearly mature sebaceous glands in the dermis, and sparse ectopic apocrine sweat glands. b Histopathological examination of skin lesions on the chest reveals an increased number of nevus cells in the basal layer and numerous mature or immature sebaceous glands in the dermis. Magnification × 50