Primary bone lymphoma of patella: A case report and review of literature.

Primary bone lymphoma (PBL) is rare bone disease that accounts for very small number of all primary bone tumors. Among the described sites of PBLs, the patella is an extremely rare example To date, only a few cases of PBL affecting the patella have been reported. Clinically, these tumors have very similar presentation of pain, decreased range of motion and swelling and, sometimes, pathologic fractures.

Thyroid acropachy: A rare skeletal manifestation of autoimmune thyroid disease.

Thyroid acropachy is a rare complication of autoimmune thyroid disease with characteristic imaging findings. Clinically, it presents as nail clubbing, swelling of digits and toes, almost always in association with thyroid ophthalmopathy and dermopathy. On radiographs, it manifests as prominent irregular and spiculated periosteal new bone formation in the hands and feet.