[Primary omental actinomycosis].

We report a case of omental actinomycosis in a female patient with an intrauterine device. A computed tomography had shown an inflammatory tumour in the abdomen. The patient was treated with laparoscopic resection of the tumour and prolonged antibiotic therapy. Abdominal actinomycosis should be considered as a differential diagnosis in patients with abdominal symptoms and unspecific clinical, radiological and laboratory findings. Definitive diagnosis of actinomycosis requires histological examination of affected tissue. Laparoscopic resection seems feasible as an alternative to open surgery.