This biopsy is obtained from a non-ulcerative, slow growing, nodule on the back of a 35 year old woman. The large cells being shown here are positive for CD68 and CD163. The most likely diagnosis is:

A Malignant rhabdoid tumor.

B Reticulohistiocytoma (solitary epithelioid histiocytoma).

C Glycogen storage disease.

D Malignant melanoma.

E Dematofibroma.