[Lymphocytic arthritis. 54 cases, of which 25 appear to be idiopathic].

The authors studied rheumatological disorders possibly accounting for significant articular lymphocytosis (greater than or equal to 90 percent). A precise diagnosis was established in 29 of 54 cases: haemophilic arthritis (3 cases), villonodular synovitis (3 cases), tubercular arthritis (1 case), rubella (1 cases), aseptic arthritis of Osler's endocarditis (2 cases), necrosis of the inner condyl (1 case), Gougerot-Sjögren syndrome (1 case), classical rheumatoid polyarthritis (8 cases), probable (7 cases). The other 25 patients suffered from: polyarthritis (7 cases), oligoarthritis (1 case), biarthritis (8 cases) and monoarthritis (9 cases) of undetermined etiology. Besides articular lymphocytosis, clinical radiological and histological study of these patients indicates that this is a distinct rheumatological entity.