Primary cutaneous neuroendocrine carcinoma with diffuse expression of thyroid transcription factor-1: Report of two cases

In conclusion, there are increasing reports of TTF1+ CK20− skin lesions without signs of systemic disease which behave clinically and prognostically like a PCNC. The origin of these TTF1 tumors are, to date, unknown.
Source: Indian Journal of Dermatology - Category: Dermatology Authors: Source Type: research