A very late recurrence of a formerly misdiagnosed low grade endometrial stromal sarcoma metastasized to the colon.

IntroductionEndometrial stromal sarcomas are rare mesenchymal neoplasms of the uterus with an indolent clinical course but a high risk of recurrence.Presentation of caseWe report a case of a 78 year old woman who presented with rectal bleeding and recurrent urinary tract infections, caused by a very late recurrence of a formerly misdiagnosed low grade endometrial stromal sarcoma, metastasized to the colon.DiscussionEndometrial stromal sarcomas are difficult to diagnose, both due to the rarity of the tumor and because of the close resemblance of the tumor to normal stromal tissue. These tumors are known for a high tendency of recurrence, therefore long term follow up is required in patients with endometrial stromal sarcoma.ConclusionIn patients with a history known for endometrial stromal sarcoma recurrence should always be considered.