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Radiological Case of the Month

John L. Gwinn, MD; Fred A. Lee, MD; Soroosh Mahboubi, MD; Herbert J. Kaufmann, MD
Am J Dis Child. 1974;128(5):697-698. doi:10.1001/archpedi.1974.02110300107015.
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Clinical History.—A 15-year-old boy was admitted to the Children's Hospital with swelling of the left thigh. Five months prior to admission, the patient fell on his left knee and had a fracture of the proximal part of the tibia. A mass gradually developed in the proximal part of the left leg. Three weeks prior to admission, increased swelling was noted.

Physical Examination.—The circumference of the left knee at the area of the mass was 39 cm (15 in), while the right knee had a circumference of 29 cm (11 in). A roentgenogram of the left knee was obtained (Figure).

Denouement and Discussion 

Hemophilic Pseudotumor in Bone  One of the serious bone complications of hemophilia is pseudotumor. This entity was first described by Starker in 1918. Hemophilic pseudotumor is not a common complication; it occurs in only 1% to 2% of patients. The time required for these tumors to form varies

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