Virtual SlidesThe virtual slide(s) for this article can be found here:
http://www.diagnosticpathology.diagnomx.eu/vs/1327125766102291.Since first reported in 1986, 14 cases of extrauterine adenomyoma have been
reported in the English literature, most often occurring in the ovaries. In this
report, we present the first case of extrauterine adenomyoma involving the liver
in a 29-year-old woman who presented with a 2-year history of low back pain with
recent worsening and a history of laparoscopic myomectomy 5 years
previously. Gross inspection of the specimen revealed a subcapsular mass that
had a well-circumscribed margin with the adjacent liver tissue. By
histopathologic examination, the multilobular mass was composed of a smooth
muscle component and benign endometrioid glands and stroma. The smooth muscle
component was focally cellular, and the endometrioid glands had secretory
features. Both the smooth muscle component and endometrioid tissue were positive
for ER and PR. The smooth muscle component was also positive for desmin and SMA,
while the endometrioid stroma was positive for CD10. Other extrauterine lesions
composed of a mixture of smooth muscle tissue and heterotopic endometrioid
tissue, including endometriosis with a smooth muscle component,
leiomyomatosis/leiomyomas associated with endometriosis and uterus-like masses,
should be included in differential diagnoses. The patient was free from
recurrence 5 months after liver tumor resection.