Hossein Kazemi Mehrjerdi - Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.
Jamshid Razmyar - Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.
Mohsen Maleki - Department of Pathobiology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.
Ali Mirshahi - Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.
Hesamoldin Halimi - Graduated Student, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.

Case Description- A ۴-year-old male homer pigeon (Columba livia) with anorexia, lethargy, emaciation, and abdominal distention was referred to Veterinary Teaching Hospital of Faculty of Veterinary Medicine, Ferdowsi University of Mashhad.Clinical Findings- Palpation revealed a solid mass in the caudal coelomic region. Radiographic and ultrasonographic examinations showed caudal coelomic soft tissue mass. On the base of the clinical and paraclinical evaluations, coelomic mass was diagnosed presumptively.Treatment and Outcome- Because of the importance of racing aspect of the pigeon, surgical remove of the mass was done. One week after surgery, there were no postsurgical complications, and the bird recovered uneventfully. Histopathologic findings identified a well-organized encapsulated granuloma. In three years follow up no recurrence of the signs was reported.Clinical Relevance- Successful surgery of occupying lesion has not been described in pigeons frequently. According to solid mass dimension (۶×۶×۵ cm) with well-organized encapsulated granuloma, this situation is a rare case.

Pigeon, Granuloma, Radiology, Surgery