Diagnostic and treatment challenges of a case of primary cutaneous signet-ring cell/histiocytoid carcinoma of the eyelid
Abstract Background Primary cutaneous signet-ring cell/histiocytoid carcinoma of the eyelid is an extremely rare but aggressive neoplasm diagnosed primarily in elderly men.Until now there are 32 published cases of signet-ring cell carcinoma or histiocytoid carcinoma of the eyelid.We report the clinical, radiographic and histological features of the