Inflammatory myofibroblastic tumor is usually a benign tumor of mesenchymal origin that is rarely found in the larynx. This case explores the unique laryngeal location and presentation of this tumor as well as the challenging radiographic and histologic findings.

The cytologic findings in a case of mesenteric fibromatosis initially suggested the diagnosis of a benign spindle-cell soft-tissue tumor. Subsequent histology and electron microscopy were performed on the resected mass, and the definitive diagnosis was established. The patient had a history of previous abdominal surgery, but no features of Gardner's syndrome. The difficulties associated with the diagnosis of mesenteric fibromatosis and the cytologic diagnosis of benign and spindle-cell soft-tissue tumors and low-grade sarcomas in general are discussed.