Lung cancer is the leading cause of death worldwide. Almost 50% of patients present with distant metastasis at the moment of diagnosis. The most common metastasis sites are lymph nodes, liver, adrenal glands, bones, and brain. However, gastrointestinal tract (GIT) metastasis from primary lung carcinoma is a rare phenomenon and it is considered a late stage of the disease, generally detected in patients with a documented previous history of a primary lung malignancy. By contrast, the finding of a lung cancer initially manifesting with GI-tract involvement is extremely rare and it is usually reported in the literature in isolated case reports. This case study involves a 70 year-old-man, initially presenting with digestive symptoms related to caecal metastasis from primary lung carcinoma.