A 40-year-old man has hemoptysis. CXR shows a coin lesion. Biopsy reveals nests of neuroendocrine cells with salt-and-pepper chromatin. What is the most likely diagnosis?
ASquamous cell carcinoma
BCarcinoid tumor
CAdenocarcinoma
DSmall cell carcinoma
A 70-year-old smoker presents with dyspnea and weight loss. CXR shows a mass in the right lung. What is the next step?
ABronchoscopy
BMRI
CSputum cytology
DCT-guided biopsy
TTF-1 (Thyroid Transcription Factor-1) immunohistochemical marker is most commonly seen in which of the following?
ASquamous Cell Carcinoma (SCC)
BLung adenocarcinoma
CLarge cell lung cancer
DPapillary thyroid carcinoma
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