In spite of well-defined diagnostic criteria in endoscopy and radiology, gastric linitis plastica often presents a diagnostic problem. Due to a unique pattern of infiltration, histological proof of cancer is difficult to achieve and depends upon immunohistological staining. We report on a patient who initially presented with clinical symptoms of perforated appendicitis. During the weeks following laparotomy, he developed increasing clinical signs of linitis plastica. The delay to the final diagnosis was 3 months because the symptoms were initially explained as a sequelae of the perforated appendicitis.