Fibrous dysplasia is an example of which chest wall lesion?

Fibrous dysplasia is an example of which chest wall lesion?

• A. Benign skeletal chest wall tumor
• B. Malignant soft tissue tumor
• C. Benign soft tissue tumor
• D. Metastasis

Answer: (A)

Fibrous dysplasia is a benign fibro-osseous lesion that arises within bone, replacing normal bone marrow with fibrous tissue and immature woven bone. When it involves the chest wall (for example, a rib), it is a skeletal lesion of the chest wall rather than a soft tissue tumor or a metastatic process. It’s not malignant and does not represent metastasis. This distinction—bone-origin, benign behavior—fits the description of a benign skeletal chest wall tumor.

Fibrous dysplasia is a benign fibro-osseous lesion that arises within bone, replacing normal bone marrow with fibrous tissue and immature woven bone. When it involves the chest wall (for example, a rib), it is a skeletal lesion of the chest wall rather than a soft tissue tumor or a metastatic process. It’s not malignant and does not represent metastasis. This distinction—bone-origin, benign behavior—fits the description of a benign skeletal chest wall tumor.