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. 2023 Mar 28;43(3):222–235. [Article in French] doi: 10.1016/j.annpat.2023.02.007

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© 2023 Published by Elsevier Masson SAS.

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Syphilis colique (A) montrant une ulcération de la muqueuse (à gauche, HES × 200) et la présence de Treponeme (flèches) en immunohistochimie avec l’anticorps anti-Treponema pallidum (à droite, × 800). Spirochétose colique (B) montrant le caractère « en frange » (flèches) du pôle apical des entérocytes en HES (à gauche, × 800), coloré par le PAS (à droite × 1200) ainsi que la positivité de ce pôle apical avec l’immunohistochimie par l’Ac anti-spirochète (C, × 800).

Colonic syphilis (A) showing ulceration of the mucosa (left, HES × 200) and the presence of Treponeme (arrows) on immunohistochemistry with anti-Treponema pallidum antibody (right, × 800). Colonic spirochetosis (B) showing the “fringed” character (arrows) of the apical pole of the enterocytes in HES (left, × 800), stained by PAS (right × 1200) as well as the positivity of this apical pole with immunohistochemistry by anti-spirochete Ac (C, × 800).