[Abdominal actinomycosis imitating non-operable stage of cancer]

In a 44-year-old woman on the basis of short hospital medical observation and gynaecological consultations, malignancy of reproductive organs was preliminarily diagnosed. During the operation the gynaecological-surgical team confirmed the presence of generalized neoplastic process in the abdominal cavity. In the obtained surgical specimens actinomycosis was diagnosed by histological examination. Longterm antibiotic therapy caused an improvement of the patient's condition, increase of body weight, improvement of blood morphologic picture, regression of tumour-like changes in the liver. The case reminds the necessity of taking into account actinomycotic infection in the differential diagnosis of conditions suggesting a neoplastic process in the abdominal cavity.