Clear cell basal cell carcinoma with neuroendocrine differentiation

Basal cell carcinomas (BCC) are tumors arising from pluripotent stem cells of the epidermis or hair follicles. There are many histological subtypes such as clear cell, a rare variant, and they have the capacity to differentiate towards distinct directions such as neuroendocrine differentiation (NED). An 81-year-old female patient presented with a mass on the lateral side of the right eyebrow. Excisional biopsy was performed. Histopathologic examination revealed clear cell BCC with prominent rosette-like structures suggesting NED. Immunohistochemically, tumor cells were positive for chromogranin and CD56. This is the first reported case of clear cell basal carcinoma with NED.