Eccrine Porocarcinoma: A Rare Tumor of the Eyelid With a Novel Histopathological Finding of Free Tumor Cells in the Tear Film.

The authors present a case of an eyelid eccrine porocarcinoma, a very rare malignant sweat gland tumor characterized histopathologically by nests of atypical poromatous cells and the presence of duct-like lumina. Histopathologic analysis of this case also exhibited numerous loose tumor cells in the adjacent tear film, a finding that has not been previously described.