Basal cell carcinoma originates from which cells?

Basal cell carcinoma originates from which cells?

• A. Melanocytes
• B. Keratinocytes
• C. Basal epidermal cells
• D. Langerhans cells

Answer: (C)

Basal cell carcinoma comes from basal epidermal cells, the cells that sit in the bottom layer of the epidermis (the stratum basale) and act as the progenitors for other keratinocytes. This specific location explains why the tumor tends to grow locally and rarely metastasize—it's rooted in the basal layer’s cell population. Melanocytes (pigment-producing cells) and Langerhans cells (immune cells) reside in the epidermis but are not the origin of basal cell carcinoma. While keratinocytes make up most of the epidermis, the cancer originates from the basal subset, not from the differentiated cells above it.

Basal cell carcinoma comes from basal epidermal cells, the cells that sit in the bottom layer of the epidermis (the stratum basale) and act as the progenitors for other keratinocytes. This specific location explains why the tumor tends to grow locally and rarely metastasize—it's rooted in the basal layer’s cell population. Melanocytes (pigment-producing cells) and Langerhans cells (immune cells) reside in the epidermis but are not the origin of basal cell carcinoma. While keratinocytes make up most of the epidermis, the cancer originates from the basal subset, not from the differentiated cells above it.