Asymptomatic colonic metastases from primary squamous cell carcinoma of the lung with a positive fecal occult blood test

Figure 1 A: Chest X-ray revealed a large abnormal shadow in the right upper lobe; B: A computed tomography (CT) of the chest demonstrated a large lung tumor in the right upper lobe obstructing the right upper bronchus.

Figure 2 Endoscopic appearance of the descending colon. A large protruding lesion with central ulceration, about 40 mm in diameter, was seen.

Figure 3 Histological examination of the biopsy specimen obtained from the colonic protruding lesion revealed tumor cells diagnosed as SCC (× 50).