Plesiomonas shigelloides is known to cause mild to cholera-like diarrhea in most infected persons. In immunocompromised patients extra-intestinal manifestations have been described. We report the first case of pneumonia caused by P. shigelloides in a 76-year-old woman who had undergone a curative gastrectomy and esophageal-jejunostomy due to a low differentiated adenocarcinoma of the stomach (pT2, pN1 pMx, G3, R0, Lauren: intestinal type). The patient was admitted in hospital with clinical signs of pulmonary infection. CT-scan revealed a cavernous lesion in the right upper pulmonary lobe. Bronchial lavage showed a granulocytic inflammation 105CFU/ml P. shigelloides. Although antibiotic treatment led to a decrease of inflammation parameters and decrease of the pulmonary infiltrate the patient died due to development of torsades de pointes tachycardia leading to ventricular fibrillation and hypoxic brain damage.