A Rare Case of Radius Head Epiphyseal Aneurysmal Bone Cyst with Predisposing Factor as Trauma Tuberculosis of Elbow apart from Genetic

INTRODUCTION: Aneurysmal bone cysts (ABCs) are benign aggressive bone lesions arising predominantly in the second decade of population in long bones at metaphyseal region which can cause local pain, swelling, and pathologic fracture. With two types, primary and secondary. diagnosis is made with various imaging modalities, although biopsy is important for diagnosis. Currently, the standard treatment is curettage or excision. Along with adjuvant therapy, chemical physical radiotherapy pharmacological to decrease recurrence was more in previous decades. CASE REPORT: A 40-year-old male presented with the complaint of pain swelling over the right elbow but no fever for the past10days with a history of trauma 15 days back. In the past, history of tuberculosis of the elbow treated 10 years back on antituberculosis therapy, antitubercular drugs, and surgery was done and recovered with satisfactory result. On investigation X-ray –pathological fracture of radial head with eccentric ballooned expanded radiolucency margin well circumscribed lesion bone cyst. Surgery aim was to excise diseased part and get good functional recovery. Wide excision of tumor was done via anterolateral approach with injection of phenol at excised tumor site Tumor bone soft tissues was send for biopsy after surgery. Post-operative recovery was satisfactory with good reasonable range of movement of elbow was achieved CONCLUSION: A rare case of primary ABC at epiphyseal region rarest site less common bone involved radius has been reported with no reconstruction done due to it extensive extent with local predisposing factor apart from genetic. ABCs are aggressive benign lesions with high rates of recurrence challenging treatment, but it is curable when approached with multimodality treatment surgical along with radiotherapy pharmacological chemical physical.