Clinical Characteristics and Long-Term Outcomes of Warm-Type Autoimmune Hemolytic Anemia

Hematology. 2016 Jul;21(6):368-74. doi: 10.1080/10245332.2016.1138621. Epub 2016 Mar 21.

Abstract

Objectives: To study the clinical manifestations, outcomes, and survival of warm-type autoimmune hemolytic anemia (AIHA) patients.

Methods: This study was a retrospective single-center study from 2002 to 2013. Clinical data of AIHA patients were reviewed and analyzed.

Results: One hundred and one patients were included, of whom 77% were female with a median age of 43 years. Primary AIHA was found in 61% of the patients. The secondary causes were systemic lupus erythematosus (SLE) (64%), solid malignancies (13%), lymphomas (10%), drugs (8%), and infections (5%). Most patients (96%) responded to steroids, which were not different between primary and secondary AIHA. Second-line treatments were required in 33 patients (33%). The indications were steroid dependence (58%), relapse (30%), and others (12%). The most common second-line treatment was cyclophosphamide (52%). The response rate for second-line treatments was 93%. Relapse occurred in 50 patients (50%) in which 58% occurred more than 3 years after diagnosis. The SLE patients relapsed and received second-line therapy more than the non-SLE group (P < 0.001). At the median 53-month follow-up, the overall survival (OS) was 84%. The independent risk factors for OS were age more than 50 years and malignancy. Sepsis was the most common cause of death.

Discussion and conclusion: AIHA has a good prognosis and long-term survival especially in young patients without malignancy. Most patients have responded initially to steroids and have a high response rate to second-line therapy. Carefully adjusted and rapid taper of immunosuppressant is necessary to avoid sepsis complications.

Keywords: Autoimmune hemolytic anemia (AIHA); Primary autoimmune hemolytic anemia; Secondary autoimmune hemolytic anemia; Warm-type autoimmune hemolytic anemia.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Anemia, Hemolytic, Autoimmune / diagnosis*
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Middle Aged
  • Retrospective Studies
  • Survival Analysis
  • Treatment Outcome
  • Young Adult