Postby roadrunner » Sat Jan 13, 2024 11:32 am
The most likely candidate here is radiation proctitis. It is common after rectal RT. There are acute and chronic presentations, with this sounding like the latter. It can start years after therapy. I was diagnosed with it after my IMRT, and it continues years later. Fortunately for me, mine is limited to mucus production and some very occasional, very light bleeding after longer runs. The spectrum, however, is very broad. It can just be inflammation in the lumen, or it can be life-threatening (rare). It is easy to diagnose with a flexible sigmoidoscopy, so I’d suggest that, but if your doctor isn’t concerned or particularly interested, he is either a bad doctor or already believes it’s radiation proctitis, and judges the symptoms aren’t too bad. It is quite hard to treat (though there are some options), so unless it gets too bad it is often left alone. Can spontaneously resolve, be static, or worsen over time.
Of course, as you’re aware, there are *many* other possible causes for this. If it were me (it was), I’d get a diagnosis asap. In case it’s unclear, “I don’t know, I wouldn’t worry too much” is not a diagnosis. But if I were a betting man (I’m not), I would guess that your doctor suspects or has diagnosed RP and just isn’t saying anything. It’s a VERY common finding after rectal radiation, so often just viewed as “anticipated changes,” or similar.
Finally, if it is RP, it’s generally not too dangerous and is generally manageable, though that may take some focus/effort. I would be aggressive about getting it addressed now, though.
Last edited by
roadrunner on Sat Jan 13, 2024 11:51 am, edited 2 times in total.
7/19: RC: Staged IIIA, T2N1M0
approx 4.25 cm, low/mid rectum, mod. well diff.; lung micronodule
8/19-10/19 4 rds.FOLFOX neoadjuvant, 3 w/Oxiplatin (reduced 70-75%)
neoadjuvant chemorad 11/19
4 rounds FOLFOX July-August 2020
ncCR 10/20; biopsies neg
TAE 11/20
Chest CT 3/30/21 growth 2 nodules (3 and 5mm)
VATS 12/8/21 sub-pleural met 7mm.
SBRT nodule 1/22
6/20/22 TAE rectal polyp)
NED from 3/22 - 3/23
4 cycles FOLFIRI
LUL VATS lobectomy 7/7/23
5 cycles FOLFOX
APR 6/24. NED for now