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A 49-year-old G5, P2 woman was referred from a local clinic because of an ovarian mass. She had been suffering from vaginal spotting and underwent diagnostic curettage at the clinic.

The patient had intermittent pelvic pain. On ultrasonography, the left ovary was normal and the right ovary showed a mixed solid echogenic mass measuring 6.3×5.2 cm (Fig. 1). At laparoscopy, a right ovarian mass was found and a right oophorectomy was performed (Fig. 2). The pathology revealed endosalpingiosis in the right ovary and no pathology of the salpinx.

Endosalpingiosis is a non-neoplastic disorder of the Müllerian system characterized by the presence of glands lined with ciliated tubal-type epithelium [1]. Surgery or a history of pelvic inflammatory disease (PID) may induce invasion of the tubal mucosa [1]. However, endosalpingiosis is also seen in patients with no history of tubal surgery or inflammation, as in our case.

Endosalpingiosis is a rare benign condition; the pathologist and gynecologist might mistake it as a malignancy [2]. No typical image contributing to the diagnosis has been reported. Although endosalpingiosis is benign, there is a report of the rare malignant transformation of endosalpingiosis that had been present for 20 years [3]. Typical diagnostic radiological and operative images of endosalpingiosis have not been reported to aid with the differential diagnosis.

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Competing Interests

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No competing interests

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