ultrastructurally , of 18 large cell carcinomas other than giant cell carcinoma eight showed characteristic differentiation toward adenocarcinoma , four toward adenosquamous carcinoma , and one each toward squamous cell carcinoma and neuroendocrine cell carcinoma , but the remaining four were undifferentiated .
C0001418
adenocarcinoma
C0206695
neuroendocrine cell carcinoma