Thank you for the query.
"Pencil thin stool" symptom is characteristic for colon cancer
. That is why, you should have colonoscopy
as soon as possible. Especially when you have noticed blood in your stool or weight lost. You should know that abdominal pain
can be related to your injury
or it can be caused by other reason. Human body is not simple and diseases likes to coexist. So there is no reason why sciatica
and colon cancer could not occur together.
Moreover, if you pains are getting worst, after ruling cancer out, you should have backbone MRI, as it is a probability that surgery may be a remedy for you.
Hope this will help.