Abstract

Monkeypox virus (MPXV) has been spreading in many European countries, the USA and Canada since May 2022. General symptoms, skin and anoperineal lesions have been reported. Anal pain is often reported, but anal canal lesions have yet to be described in these patients. The aim of this study was to describe anoperineal lesions in patients infected with MPXV undergoing systematic margin and anal canal examination at a tertiary care centre in France. In this prospective descriptive study, systematic anal examination was performed in 20 patients diagnosed with MPXV infection at Bichat Hospital, Paris, France between 6 and 11 July 2022. Anal swabs were also obtained from all these patients for polymerase chain reaction testing for MPXV. All the patients were men that have sex with men (MSM). Sixteen patients had anal symptoms: 13 reported anal pain, and the other anal symptoms described were anal bleeding (n=12), pruritus (n=11), dyschezia (n=10), tenesmus (n=13), burning (n=3), swelling (n=9) and discharge of mucus (n=9). Proctological examination detected: (i) anal margin lesions in 14 patients (vesicles, n=8; pustules, n=6; ulceration, n=6); (ii) anal canal lesions in 16 patients (ulceration, n=13; ulcers, n=4; pustules, n=1), seven of whom presented anal hypertonia; and (iii) rectal lesions in 12 patients (congested rectum, n=6; erythema, n=10; ulcers, n=2; not seen in one case). the presence of mucus was noted in 10 patients and the presence of blood in six patients. This is the first study to describe anal canal lesions in patients infected with MPXV. Most of the observed lesions were ulceration, accounting for the pain reported.

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