Primary Mucinous Carcinoma of Skin.

A 65 year old male had recurrent primary mucinous carcinoma of skin arising in the upper one third of the left forearm. It was characterised by the presence of a large area , of mucin with the tumour cells present in sheets and arranged in duct-like structures. Primary mucinous carcinoma is characterised by a very low incidence of metastases. The mucinous material seen in the primary mucinous carcinoma is non - reactive to alcian blue and aldehyde fuchsin at a very low pH (0.4).