A Rare Entity of the Anterior Chest Cage Rib Chondrosarcoma: A Case Report and Review of Literature.

Introduction: Primary bone cancers, also called bone sarcomas, can arise anywhere in the body. Less than 1% of cancers are identified as primary bone cancers annually, and they are correlated with high rates of morbidity and death. Twenty to twenty-seven percent of primary malignant osseous neoplasms are chondrosarcomas, the rarest subtype of bone sarcomas. The incidence of chondrosarcomas in Saudi Arabia was less common than globally discovered chondrosarcomas, and only a few cases have been recorded. The most common presentation of the primary CS is to encompass the bony skeleton of the long bones of the lower extremities and the axial skeleton. Detecting primary CS in the anterior chest wall and the rib cage is rare. To our knowledge, chondrosarcomas of the ribs encroaching on the anterior chest are rare and have never been documented in Saudi Arabian or Middle East medical or surgical literature.

Case presentation: We describe a case of a 32-year-old female with chondrosarcoma of the left anterior 7^th rib, with no other medical or surgical histories. Further work-up at the tertiary care center, including CT-scan, MRI, and detailed triple bone scan (nuclear scan) imaging and histological biopsy, revealed features of chondrosarcoma arising from the ribs and involving the surrounding soft tissue. The patient underwent en masse surgical resection with a 4cm margin, including the 6^th rib and partial resection of the left hemidiaphragm and a small piece of the diaphragm. The patient was discharged without any inauspicious consequences.

Conclusion: In the current work, we comprehensively discussed a scarce case of the anterior chest wall chondrosarcoma affecting the rib. This case highlights the importance of early detection of a rare tumour using a toolkit diagnostic approach to provide successful management and caring of the patient. Consequently, this will guarantee encouraging outcomes and thus stress the fruitful role of the surgery as the best curative modality in chondrosarcoma patients.