RESUMO
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.
