A rare costal tumor [A propos d'une tumeur costale rare]

Background: costal primary tumors are rare and dominated by malignant tumors. hemangioma of the bone represents only 1% of the bone tumors. costal localization accounts only for 1% of the cases and only about fifty cases have been reported in the literature. aim: to describe a rare costal tumor,its histological features and the main differential diagnoses. observation: the authors describe the case of a 46 - year-old woman who present with chest pain. radiological findings didn't allow to rule out a malignant tumor and the treatment consisted in the resection of the posterior arch of the rib. microscopic examination concluded to a costal hemangioma and the patient didn't present recurrences after 6 years of follow up. conclusion: costal hemangioma is an exceptional tumor with a debated etiology. some radiological features may be specific but the diagnosis is based on histological findings. these tumours have a good prognosis and no case of recurrence have been reported in the literature.