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Gastrointestinal actinomycosis Volume 25, issue 1, Janvier 2018

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Authors
1 Hôpital Beaujon, Service d’oncologie digestive, 100 boulevard du général Leclerc, 92110 Clichy, France
2 Hôpital Beaujon, service de médecine interne, 100 boulevard du général Leclerc, 92110 Clichy, France
3 Hôpital Monod, Service de gastroentérologie, Le Havre
* Tirés à part

Gastrointestinal actinomycosis is a rare and often underdiagnosed infection caused by a slow growing saprophytic bacterium responsible for an indolent organ infiltration. It is often mistaken with a tumor leading to unjustified surgery. Ideally, the diagnosis should be envisaged in cases of chronic inflammation with morphologic signs of tumoral pseudo-invasion of undetermined origin. To avoid an unjustified or even deleterious surgical procedure, actinomycosis should be evoked precociously, by performing bacteriological or histological analyses that must be repeated when necessary. The laboratory should be aware of the suspected bacteria thus being able to perform prolonged anaerobic cultures after a quick transfer. The key treatment is based on prolonged administration of amoxicillin. Surgery is reserved only for complicated forms.

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