• S. Afr. Med. J. · Dec 2023

    Case Reports

    Recurrent venous thrombosis - an unusual first presentation of autoimmune polyendocrinopathy syndrome type 3B.

    • N Letete, D Vaz, P H Malishi, J J Pogieter, and P Rheeder.
    • National Health Laboratory Services, Tshwane Academic Division, Pretoria, South Africa. nena.letete@gmail.com.
    • S. Afr. Med. J. 2023 Dec 31; 114 (1): 172117-21.

    AbstractA 45-year-old female presented with unprovoked recurrent venous thromboembolism (VTE), in unusual sites, and pancytopenia, posing a complex diagnostic challenge. Work-up for inherited thrombophilia, antiphospholipid syndrome (APLS) and paroxysmal nocturnal haemoglobinuria were unremarkable. Investigations revealed autoimmune thyroid disease, and a mixed iron/vitamin B12 deficiency due to pernicious anaemia and resultant atrophic gastritis. Hyperhomocysteinaemia due to vitamin B12 deficiency was identified as a potential contributor to her recurrent VTE. This case highlights the unusual initial presentation of autoimmune polyendocrinopathy syndrome type 3B (APS-3B) with recurrent thromboembolism, and emphasises the importance of considering hyperhomocysteinaemia in unprovoked and atypical VTE cases.

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