Introduction.

Benign mesothelial cysts (BMC) are a rare entity that occurs especially in women of reproductive age. It is due to an abnormal proliferation of the mesothelium that can originate from various intra-abdominal structures and it is initially asymptomatic.

Clinical case.

This is a case of a 20-year-old woman with a suspicious malignant neoplasia, in whom the diagnosis of a mesothelial cyst originating in the right Fallopian tube was confirmed. Successful surgical treatment was achieved.

Discussion.

Despite the close relationship of this entity with the uterus and ovaries, there are no reports of mesothelial cysts originating from the Fallopian tubes. The treatment of mesothelial cysts is surgical and in the case of this patient it was performed in order to improve the symptoms and eradicate the disease. The decisions were taken based on the oncologists' expert opinion of the gastrointestinal tumor board.

Conclusions.

Mesothelial cysts are neoplasms of low incidence, but they should be considered as a differential diagnosis of abdominal tumors. The case of a patient treated surgically with successful results and a one-year follow-up without recurrences is presented.

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