Can radiation cause fatigue and pelvic pain after a hysterectomy?

Question

Hello doctor,

I am 52 and had a hysterectomy four months ago for endometrial cancer, stage 2. After surgery, the doctor recommended radiation therapy, and I recently completed a few sessions. Since then, I have been feeling fatigue and mild pelvic discomfort.

Are these common side effects after pelvic radiation?
Also, how do doctors monitor if cancer comes back?
Is it mainly through scans or physical exams?

My CA-125 blood test was normal, but I am not sure how reliable that marker is for this cancer.

Please help.

Answer 1

Hello,

Welcome to icliniqcom.

I understand your concern.

What you are describing is something many patients go through after pelvic radiation, so you are not alone in feeling this way. The fatigue you are noticing is very common.

Radiation can make the body feel drained because normal tissues also take time to heal, and that recovery can stretch over several weeks or even a few months after treatment ends. The mild pelvic discomfort you mentioned can also happen due to irritation and inflammation in the tissues that were exposed to radiation.

As long as it is not getting worse and there are no new symptoms like bleeding, fever, or significant bowel or bladder trouble, it is usually part of the healing process. Regarding how doctors check if the cancer has come back, follow-up is mostly based on regular check-ups rather than frequent scans.

During visits, your doctor will talk to you in detail about how you are feeling and do a pelvic examination. These are actually the most important ways to pick up early signs of recurrence.

Scans like CT (computed tomography) or MRI (magnetic resonance imaging) are not done routinely every time; they are usually advised only if there is a symptom or something concerning the examination.

About CA-125 (cancer antigen-125), it is understandable to wonder about it. In endometrial cancer, this test is not very reliable for everyone. It becomes useful mainly if it was elevated before treatment and then decreased afterward.

If your levels were normal to begin with, then a normal value now is reassuring but does not really help much in detecting recurrence, so doctors do not depend on it alone.

At this stage, around four months after surgery and during recovery from radiation, what you are feeling fits more with treatment-related effects rather than anything worrisome.

Still, it is important to stay alert to symptoms like any vaginal bleeding, increasing or persistent pelvic pain, unexplained weight loss, or changes in bowel or bladder habits, and report them if they occur.

I hope this helps.

Thank you.