BACKGROUND: Gastric zygomycosis is a rare but potentially lethal complication in transplant patients. Forty-two cases of gastric mucormycosis have been described in the literature, with a mortality of 98%. METHODS: We report of a case of gastric mucormycosis in a 45-year-old male undergoing liver transplantation for alcohol-induced cirrhosis. The diagnosis was made 20 days after transplantation in a biopsy of a bleeding gastric ulcer identified during a reoperation for a common bile duct stricture. RESULTS: After the surgical procedure and therapy with amphotericin B, the patient made a good recovery and is alive and well 2 years after transplantation. CONCLUSIONS: Gastric mucormycosis should be suspected in those patients in whom gastrointestinal symptoms such a pain or bleeding are present. Because the diagnosis is dependent on histology, the importance of biopsy cannot be underestimated. Once diagnosed, a successful outcome depends on effective treatment with amphotericin.