Which are examples of benign skeletal tumors of the chest wall?

Which are examples of benign skeletal tumors of the chest wall?

• A. Chondromas, fibrous dysplasia, eosinophilic granuloma, cavernous hemangioma
• B. Lipoma, cavernous hemangioma
• C. Osteosarcoma
• D. Ewing sarcoma

Answer: (A)

Benign skeletal tumors of the chest wall are slow-growing lesions that originate in bone or its periosteal covering, not in soft tissue. The best examples include chondromas (enchondromas), fibrous dysplasia, eosinophilic granuloma, and cavernous hemangioma. Chondromas are benign cartilaginous tumors within bone, often involving the ribs, and they appear as well-defined lytic lesions that may show calcified cartilage matrix on imaging; they typically behave indolently. Fibrous dysplasia is a fibro-osseous process where normal bone is replaced by fibrous tissue and immature bone, producing an expansile rib lesion with a characteristic ground-glass appearance and a benign, slowly progressive course. Eosinophilic granuloma, a manifestation of Langerhans cell histiocytosis, can present as a solitary rib lytic lesion in children or young adults and may heal with limited treatment or curettage. Cavernous hemangioma is a vascular lesion within bone that creates a slowly enlarging rib lesion with cortical thinning but remains benign and is usually managed surgically if symptomatic. The other options do not fit as benign skeletal chest wall tumors: lipoma is a soft-tissue tumor, while osteosarcoma and Ewing sarcoma are malignant bone tumors.

Benign skeletal tumors of the chest wall are slow-growing lesions that originate in bone or its periosteal covering, not in soft tissue. The best examples include chondromas (enchondromas), fibrous dysplasia, eosinophilic granuloma, and cavernous hemangioma. Chondromas are benign cartilaginous tumors within bone, often involving the ribs, and they appear as well-defined lytic lesions that may show calcified cartilage matrix on imaging; they typically behave indolently. Fibrous dysplasia is a fibro-osseous process where normal bone is replaced by fibrous tissue and immature bone, producing an expansile rib lesion with a characteristic ground-glass appearance and a benign, slowly progressive course. Eosinophilic granuloma, a manifestation of Langerhans cell histiocytosis, can present as a solitary rib lytic lesion in children or young adults and may heal with limited treatment or curettage. Cavernous hemangioma is a vascular lesion within bone that creates a slowly enlarging rib lesion with cortical thinning but remains benign and is usually managed surgically if symptomatic. The other options do not fit as benign skeletal chest wall tumors: lipoma is a soft-tissue tumor, while osteosarcoma and Ewing sarcoma are malignant bone tumors.