Fig. 4From: Pulmonary neuroendocrine carcinoma mimicking neurocysticercosis: a case reportNeoplastic cells demonstrated strong diffuse nuclear positivity for thyroid transcription factor-1 (TTF-1) by immunohistochemistry (200Ă— magnification). TTF-1 positivity is most frequently observed in neuroendocrine neoplasms of pulmonary originBack to article page