Nevus cells are classified as_______________?
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Answer: A. Modified melanocytes
Explanation
Nevus cells found in common moles are classified histologically as modified melanocytes. These cells migrate from the neural crest into the skin during embryonic developmental stages. They lose dendritic processes and form cohesive nests within the epidermis and dermis layers. Melanocytes are normal pigment-producing cells residing within the basal layer of the epidermis. Nevus cells can aggregate at the dermal-epidermal junction or extend deeper into the dermis. Histological evaluation distinguishes benign melanocytic nevi from malignant melanoma lesions.
Most individuals develop multiple benign nevi over their lifetime due to genetic and sun factors. Pathologists carefully examine pigmented skin lesions to detect early signs of malignant transformation. Surgical removal is performed when nevi exhibit suspicious clinical changes in size or color. Excessive pigment alone does not define nevus cells, as standard melanocytes produce melanin pigments. Nevus cells are typically less functionally active in pigment transfer compared to normal melanocytes. Size is not the defining criterion, as nevus cells are often smaller than typical dendritic melanocytes.
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