title: Erythematous patch overlying a swollen knee--quiz case. Intralymphatic histiocytosis.
authors.forename: Yvonne E
authors.initials: YE
authors.lastname: Chiu
authors.forename: Jack E
authors.initials: JE
authors.lastname: Maloney
authors.forename: Chafik
authors.initials: C
authors.lastname: Bengana
mesh_terms: D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000601:surgery; D019645:Arthroplasty, Replacement, Knee / Q000379:methods; D001707:Biopsy, Needle; D004359:Drug Therapy, Combination; D004487:Edema / Q000209:etiology / Q000473:pathology; D004890:Erythema / Q000209:etiology / Q000473:pathology; D005260:Female; D015614:Histiocytosis / Q000175:diagnosis / Q000188:drug therapy / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D008206:Lymphatic Diseases / Q000175:diagnosis / Q000188:drug therapy / Q000473:pathology*; D042601:Lymphatic Vessels / Q000473:pathology*; D008875:Middle Aged; D010808:Physical Examination; D035583:Rare Diseases; D012867:Skin / Q000473:pathology*; D017211:Treatment Failure