When a woman presents with a growth in the rectum, doctors often look for common gastrointestinal tumors. However, a new look at these cases suggests that rectal endometriosis—where tissue similar to the lining of the uterus grows in the rectum—can look almost identical to other tumors. This makes it a tricky diagnosis to catch early.
One specific case and a review of 12 other cases showed that these conditions share overlapping features. In the primary case, doctors confirmed the presence of endometrial glands and stroma, which are the building blocks of the uterine lining. This finding highlights that even if a patient does not experience symptoms tied to her menstrual cycle, the condition could still be present.
Because these conditions look so similar under a microscope, doctors should consider rectal endometriosis as a possibility for any woman with a rectal submucosal lesion. While the evidence comes from a small number of cases rather than a large trial, it serves as a reminder to look closely at all possibilities when treating these complex issues.
Common questions
What is rectal endometriosis?
Rectal endometriosis happens when tissue similar to the lining of the uterus grows in the rectum. In this study, doctors confirmed the presence of endometrial glands and stroma in a patient's tissue. This means the tissue behaved like uterine tissue even though it was located in the digestive tract.
Can rectal endometriosis look like other conditions?
Yes. The study found that intestinal endometriosis and gastrointestinal tumors have overlapping diagnoses. This means they can look very similar during medical exams. Because they look so much alike, it is important for doctors to consider both possibilities when they find a lesion in the rectum.
Does a patient need period symptoms to have rectal endometriosis?
Not necessarily. The findings suggest that doctors should consider rectal endometriosis for women with rectal submucosal lesions even if they do not have periodic symptoms. Because the condition can mimic other tumors, it is important to check for it regardless of whether the patient's symptoms follow a cycle.
