title: [Clinical and pathological analysis of 25 cases of microscopic polyangiitis].
abstract: OBJECTIVE
  To analyze the clinical and pathological features of microscopic polyangiitis (MPA) to improve the diagnosis and treatment of the disease.
  
  
  METHODS
  Twenty-five cases of MPA were retrospectively analyzed.
  
  
  RESULTS
  The onset symptoms of MPA, often nonspecific, included fever, muscle and joint pain, fatigue, loss of weight, etc, with varying degrees of proteinuria, hematuria and renal insufficiency. The pathological types revealed by renal biopsy were mainly focal segmental necrotizing glomerulonephritis or pauci-immune crescentic glomerulonephritis. Timely immunosuppressive therapy could improve the outcome.
  
  
  CONCLUSIONS
  The early symptoms of MPA are often nonspecific to easily result in misdiagnosis. Examination of ANCA titers and timely renal biopsy are helpful to establish an early diagnosis. Immune suppression therapy and plasma exchange when necessary should be initiated after the establishment of the diagnosis. The disease activity and drug toxicity should be carefully monitored to improve the prognosis.
authors.affiliation: Department of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.E-mail: liuhfdd@163.com.
authors.forename: Hong-Fa
authors.initials: HF
authors.lastname: Liu
authors.forename: Hao
authors.initials: H
authors.lastname: Ren
authors.forename: Guo-Bao
authors.initials: GB
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D055953:Microscopic Polyangiitis / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy*; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies