Osteoid osteoma of the patella
نویسندگان
چکیده
A 51-year old female referred to our department on July 2000 with a 21/2 years history of intense, aching knee pain, present day and night, well localized at the patella. There was no history of previous trauma, nor relief with non-steroidal antiflammatory agents administration. Regarding past medical history, hypertension was only recorded. Physical examination revealed mild effusion, no redness or local rise of temperature. Range of motion was very limited (from 0o to 20o of extension) due to incapacitating pain, which was aggravated by patellar squeezing. Severe thigh atrophy was also apparent, whereas quadriceps contraction was impossible because of pain. Clinical examination could not be completed due to patient’s non-cooperation. Laboratory studies including CBC, ESR, CRP and basic biochemical control were unremarkable. A profile radiograph of the knee joint showed a small radiolucent nidus located on the upper border of the patella (Fig. 1). MRI (T1WI – sagittal image) showed a well circumscribed round alteration in the marrow of the patella,
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