A rare finding of Actinomyces odontolyticus abdominal actinomycosis presenting as abdominal wall and pericolic pseudotumoral mass

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COD: 27_09_2021_3568 Categorie: , , ,

Manuel Valeri, Lavinia Amato, Michela Boncompagni, Roberto Ciaccarini,
Rachele Del Sordo, Adolfo Petrina

Ann Ital Chir, 2021; 10 – Sept. 27

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A rare finding of actinomyces odontolyticus abdominal Actinomycosis presenting as abdominal wall
and pericolic pseudotumoral mass

Abdominal actinomycosis refers to a rare chronic suppurative infectious occurrence, caused by filamentous Gram-positive microaerophilic and anaerobic bacteria Actinomyces, that may appear as an abdominal mass and/or abscess, feasibly mimicking a malignancy 1,2. Due to its rarity and unspecific clinical evidence, the majority of cases are diagnosed after tissue specimen. We hereby report a case of a 69-year-old patient with a one week worsening abdominal pain and swelling. A large tender palpable mass in the epigastric region was noted on physical exam. An ultrasound-guided drainage followed by a surgical excision approach became both a way to confirm the diagnosis and a therapeutic tool. Diagnosis of actinomycosis was made on histopathology and microbiology. Even though the incidence of actinomycosis has decreased, the abdominal presentation has been observed with increasing frequency 3.