Clinical case of treatment of secondary chondrosarcoma developed due to Ollier disease

Abstract

Ollier disease is a rare non-hereditary disorder of the bone tissue characterized by development of multiple benign bone tumors – enchondromas. One of the dangerous complications of this pathology is tumor transition into chondrosarcoma. Currently, there are no drug therapies for Ollier disease. Surgical treatment is performed in case of complications (chondrosarcoma, pathological fracture).The article presents a clinical case of chondrosarcoma treatment  in a 42-year-old male with Ollier disease diagnosed when the patient was 8 years old. Since 2021, the patient noted intensive tumor growth on the right foot and left calf. In August of 2022, the patient sought medical help at the Republican Clinical Oncological Dispensary of the Bashkortostan Ministry of Health. Examination showed synchronous malignant transformation of enchondromas of the right foot and left calf confirmed by histological exam. Due to tumor advancement, surgical treatment  was performed. Other enchondroma lesions are being watched.