• Internal medicine · Mar 2023

    Review Case Reports

    Colitis with Hypereosinophilia Following the Second Dose of the BNT162b2 mRNA COVID-19 Vaccine: A Case Report with a Literature Review.

    • Tsuyoshi Doman, Hiroaki Saito, Yukari Tanaka, Dai Hirasawa, Mareyuki Endo, Daichi Togo, and Tomoki Matsuda.
    • Department of Gastroenterology, Sendai Kousei Hospital, Japan.
    • Intern. Med. 2023 Mar 15; 62 (6): 865869865-869.

    AbstractA 61-year-old man presented with a 7-day history of watery diarrhea and loss of appetite after receiving the second dose of the Pfizer-BioNTech COVID-19 vaccine. Laboratory studies showed significant eosinophilia and an elevated IgE level (white cell count, 18.4×109/L; eosinophil count, 9.5×109/L; and IgE level, 540 IU/L). Symptoms resolved 10 days after vaccination without any steroids or antiallergic medications, and the eosinophil count had also returned to within normal limits 2 months later. Several cases of eosinophilic disorders following receipt of any type of injectable COVID-19 vaccine have been reported, so the etiology should be examined.

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