Background: Metastasis from gastrointestinal tract cancer is usually seen in the liver, peritoneum and lymph nodes and less frequently in ovaries, lungs, central nervous system and bone. Bone marrow is a rare region for metastasis and its involvement is associated with worst prognosis. Case Report: We hereby report cases of gastric carcinoma (poorly differentiated adenocarcinoma, diffuse type) and caecal adenocarcinoma metastasizing to the bone marrow. Conclusion: Awareness about unusual sites of metastasis is necessary since these cases are associated with poor prognosis.