This 11-year-old boy had a history of an asymptomatic black mole on his left arm for many years. The lesion was diagnosed clinically as a blue nevus, but a skin biopsy showed the typical changes of a pigmented spindle cell nevus. The pigmented spindle cell nevus also known as a Reed nevus is considered a variant of the Spitz nevus. It presents as a well-circumscribed deeply pigmented nodule on the extremities of young adults. Histologically it resembles the Spitz nevus but is composed of spindled melanocytes with heavy melanin pigmentation. As in a Spitz nevus, this nevus is symmetrical with maturation and lack of deep dermal mitotic figures.
Description
Histologically it resembles the Spitz nevus but is composed of spindled melanocytes with heavy melanin pigmentation. As in a Spitz nevus, this nevus is symmetrical with maturation and lack of deep dermal mitotic figures.
