system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Characterstic of basal cell carcinoma is:
assistant
The correct answer is  Basal cell carcinomas are composed of islands or nests of basaloid cells (i.e. cells resembling cells in the normal basal cell layer of the epidermis), with palisading of the cells at the periphery and a haphazard arrangement of those in the centers of the islands. The tumor cells have a hyperchromatic nucleus with relatively little, poorly defined cytoplasm. 
Other options:
Keartin pearls- seen in squamous cell carcinoma
Foam cells- seen in Xanthoma
Psammoma bodies- seen in papillary thyroid carcinoma