A case of bronchogenic carcinoma presenting with acute abdomen.

Colonic metastasis of the bronchogenic carcinoma is quite rare. Here we document an extremely rare presentation of the lung cancer that presented with acute abdomen and was diagnosed as intestinal obstruction due to colon carcinoma initially. He underwent an urgent operation and the obliterating mass in the colon was resected and reported as "colon metastasis from epidermoid carcinoma probably of the lung". Afterwards bronchoscopy revealed an endobronchial lesion in the right lower lobe that was diagnosed as poorly differentiated squamous cell lung carcinoma. In this case, colon metastasis was diagnosed before the diagnosis of the primary disease.