This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
The commonest clinical pattern of basal cell carcinoma is 
Select and explain. 
A. Nodular, B. Morpheaform, C. Superficial, D. Keratotic
A: Nodular
Answer: A: Nodular 
Explanation: .basal carcinomas are composed of islands of basaloid cells ( like cells of basal layer of epidermis) with palisading of cells at the periphery and a haphazard arrangement of those in the centres of the islands . the tumour cells have a hypochromatic nucleus with relatively poorly defined cytoplasm they spread by local invasion . lymphatic spread is not seen so regional lympnodes are not enlarged they are diagnosed using wedge biopsy most common site is inner canthus of eye also called tear cancer they show a nodular pattern