PMID- 19851514 OWN - NLM STAT- MEDLINE DCOM- 20100407 LR - 20211020 IS - 1178-1998 (Electronic) IS - 1176-9092 (Print) IS - 1176-9092 (Linking) VI - 4 DP - 2009 TI - Clinical, radiological, and biochemical characteristics in patients with diseases mimicking polymyalgia rheumatica. PG - 391-5 AB - To find out clues to differentiate between polymyalgia rheumatica (PMR) and other diseases that mimic PMR. We studied Japanese patients with PMR (n = 7), pseudogout (n = 1), remitting seronegative symmetrical synovitis with pitting edema (RS3PE) syndrome (n = 1), and post-infectious polyarthritis (n = 1). The distribution of inflammation in patients was evaluated using a gallium-67 scintigraphy. We measured serum C-reactive protein (CRP), matrix metalloproteinase-3 (MMP-3), and vascular endothelial growth factor (VEGF) in patients before and after treatment. Further, we compared the clinical course of PMR with that of other diseases that mimic PMR. Patients with pseudogout, RS3PE syndrome, post-infectious polyarthritis manifested similar changes in scintigraphic findings and serum CRP, MMP-3, and VEGF levels to PMR before the treatment. A significant reduction in serum CRP levels at one week after use of nonsteroidal anti-inflammatory drugs (NSAIDs) is a good clue to differentiate pseudogout and post-infectious polyarthritis from PMR. Chondrocalcinosis in the radiographs of joints is also effective to differentiate pseudogout from PMR. A small reduction of CRP levels after NSAIDs use and promptly ameliorated CRP and symptoms by a low-dose steroid therapy, which was commonly observed in patients with PMR, were also found in a patient with RS3PE syndrome. Pitting edema of the back of hands and gallium uptake in metacarpophalangeal (MCP) joints were useful to differentiate RS3PE syndrome from PMR. In conclusion, pseudogout, RS3PE syndrome, post-infectious polyarthritis should be included in the spectrum of diseases mimicking PMR. A promptly decreased serum CRP level by NSAIDs is a good clue to differentiate pseudogout and post-infectious polyarthritis from PMR. Pitting edema of the back of hands and symmetric gallium uptake in MCP joints are characteristic for RS3PE syndrome. FAU - Yanai, Hidekatsu AU - Yanai H AD - Division of General Medicine, Department of Internal Medicine, The Jikei University School of Medicine, Kashiwa, Japan. yanaih@jikei.ac.jp FAU - Yoshida, Hiroshi AU - Yoshida H FAU - Tada, Norio AU - Tada N LA - eng PT - Case Reports PT - Journal Article DEP - 20091012 PL - New Zealand TA - Clin Interv Aging JT - Clinical interventions in aging JID - 101273480 RN - 0 (Biomarkers) SB - IM MH - Aged MH - Aged, 80 and over MH - Biomarkers MH - Diagnosis, Differential MH - Female MH - Humans MH - Japan MH - Joint Diseases/*diagnosis/physiopathology MH - Male MH - Musculoskeletal Diseases/*diagnosis/physiopathology MH - Polymyalgia Rheumatica/*diagnosis PMC - PMC2762363 OTO - NOTNLM OT - RS3PE syndrome OT - gallium-67 scintigraphy OT - polymyalgia rheumatica OT - post-infectious polyarthritis OT - pseudogout EDAT- 2009/10/24 06:00 MHDA- 2010/04/08 06:00 PMCR- 2009/10/12 CRDT- 2009/10/24 06:00 PHST- 2009/10/24 06:00 [entrez] PHST- 2009/10/24 06:00 [pubmed] PHST- 2010/04/08 06:00 [medline] PHST- 2009/10/12 00:00 [pmc-release] AID - cia-4-391 [pii] AID - 10.2147/cia.s7489 [doi] PST - ppublish SO - Clin Interv Aging. 2009;4:391-5. doi: 10.2147/cia.s7489. Epub 2009 Oct 12.