We report a case of hemophilic pseudotumor in the ulna of a 6-year-old boy treated with radiation therapy. A total dose of 900 cGy in 6 fractions was given in 6 consecutive days. Progression of cystic changes was halted within a month. New bone formation and trabeculation were found on the 4th month. Complete healing of the lesion and bony replacement were found on the 12th month. The patient was followed up to 72 months and there was no evidence of recurrence and no bone growth disturbance. Radiation therapy can be an effective alternative modality in treating hemophilic pseudotumor.
Bone Cysts/radiotherapy* ; Bone Cysts/pathology ; Bone Cysts/etiology* ; Case Report ; Child ; Hemophilia A/pathology ; Hemophilia A/complications* ; Human ; Male ; Ulna/pathology*

Giant cell tumors are distinctive neoplasms characterized by a profusion of multinucleate giant cells scattered throughout a stroma of mononuclear cells. Most giant cell tumors are found at the epiphyses of long bones, especially around the knee joint. Flat bone involvement is rare. However, a case of giant cell tumor with secondary aneurysmal bone cyst was encountered at the scapula of a 25-year-old man. Since the occurrence of a giant cell tumor with secondary aneurysmal bone cyst on flat bones (i.e., the scapula) is extremely rare, the above-mentioned case is worthy of reporting.
Adult ; Bone Cysts/*etiology/pathology ; Bone Neoplasms/*complications/pathology ; Giant Cell Tumors/*complications/pathology ; Humans ; Male ; Scapula

Adult ; Bone Cysts, Aneurysmal ; complications ; diagnostic imaging ; pathology ; Bone Neoplasms ; etiology ; pathology ; Cell Transformation, Neoplastic ; pathology ; Humans ; Male ; Radiography