Isolated intra-articular pseudorheumatoid nodule of the knee.
The authors describe a case of an isolated intra-articular pseudorheumatoid nodule of the knee in an 18-year-old male patient without a diagnosis of rheumatoid arthritis. The patient initially presented with a 3 year history of anterior knee pain and was found to have a 2.8 × 2.1 cm lobulated soft-tissue mass. Histologic findings showed fibrinoid necrosis and chronic inflammatory changes that were consistent with those of a pseudorheumatoid or rheumatoid nodule, and surgical excision of the nodule was curative. A review of the literature revealed no prior cases of an intra-articular pseudorheumatoid nodule or rheumatoid nodule in a patient without clinical or serologic evidence of rheumatoid arthritis.
Department of Orthopaedic Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, MMC Greene Medical Arts Pavilion, 3400 Bainbridge Avenue, Bronx, NY 10467, USA.
Mickey
M
Plymale
Andrew
A
Lovy
Esperanza
E
Villanueva-Siles
David S
DS
Geller
D000293:Adolescent; D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D011859:Radiography; D012218:Rheumatoid Nodule / Q000000981:diagnostic imaging* / Q000473:pathology