Abstract
AbstractMusculoskeletal manifestations as the sole presentation in acute leukemia is rare in adults. Acute promyelocytic leukemia (APML) is a subtype of acute myeloid leukemia (AML) with reported incidence of 10 to 15% of total AML cases. APML presenting as polyarticular arthritis has never been reported in the literature. We present an interesting case of 20-year-old male patient who manifested with polyarticular arthritis mainly of small joints as the initial presentation, followed by pancytopenia and eventually was diagnosed as a case of APML on bone marrow morphology and molecular analysis for PML-RARα transcript. He was successfully treated with all-trans-retinoic acid (ATRA) and arsenic trioxide (ATO). Arthritis also resolved with complete remission of APML. Arthritis in a case with pancytopenia should promptly be evaluated prior to treatment with steroids and anti-metabolites. Arthritis can be a presenting manifestation of APML and responds to prompt management of leukemia as in other cases of leukemic arthritis.
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