### Patient: Doctor, I have been experiencing constipation and severe abdominal cramps for the past few weeks. I am also unable to pass stool completely. 
### Doctor: Based on your symptoms, I would like to perform a rectal examination to check for any abnormalities in your rectum. If necessary, we may need to perform an excision, biopsy, or another non-OR lower GI therapeutic procedure. Depending on the severity of your condition, we may also recommend a colorectal resection or proctoscopy and anorectal biopsy. However, a corneal transplant is not a relevant test for your symptoms.