title: Bone scan in the patellofemoral pain syndrome.
abstract: Eighty patients who complained of retropatellar pain underwent evaluation by bone scintigraphy, intraosseous pressure determination, radiography, arthroscopy and physical diagnostic tests. The bone scans showed that 48% of the painful knees had an increased uptake compared with 9% for the normal joints. A highly significant correlation was evident between an increased uptake and established chondromalacia. For the diagnosis of a high pressure patella, radiography was only 7% sensitive (6/88), compared with 44% (39/88) for bone scintigraphy and 78% for the clinical "sustained flexion" test. The positive predictive value of a bone scan for detecting a high pressure patella was 0.72 (39/54). The best predictor was a positive sustained flexion test with a predictive value of 0.85 (69/81).
mesh_terms: D000293:Adolescent; D000328:Adult; D001853:Bone Marrow / Q000503:physiopathology; D002358:Cartilage, Articular / Q000473:pathology; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology*; D010147:Pain Measurement; D010329:Patella / Q000000981:diagnostic imaging* / Q000473:pathology; D011237:Predictive Value of Tests; D011312:Pressure / Q000009:adverse effects / Q000379:methods; D011877:Radionuclide Imaging; D013669:Technetium Tc 99m Medronate
chemical_list: D013669:Technetium Tc 99m Medronate