[Abdominal pain during the course of lung cancer].

Introduction: Metastatic involvement of the peritoneum from a lung cancer is infrequently encountered.

Methods: We present the case report of a patient with bronchial adenocarcinoma whose course is complicated by the occurrence of a peritoneal carcinomatosis, as documented by FDG-PET.

Conclusion: Unexplained abdominal pain in a lung cancer patient may be a peritoneal carcinomatosis.