Hi doctor I live in UAE last 8 years.

treatment of the adenomatous lesion:
 such case must be fully evaluated with MRI scan  or endoscopic US to evaluated the layers of the rectal wall involved in addition to the surrounding lymphatic and vascular status, fulguration is a procedure that uses heat from an electric current to destroy abnormal tissue, but in case of recurrence it may be advised that this lesion must be respected, , the resection may be done endoscopically  depending on how far the lesion from the anal verge, and the biopsy should be evaluated by histopathology , if there is evidence of no clear marsion for specimen, the segment of the wall involved with adenoma  should be resected  with primary anastomosis.
Diagnosis:
this lesion must be fully evaluated again, the lesion must be sent for histopathology to evaluate its type and behavior , in addition this lesion must be evaluated by endoscopic US or pelvic MRI so to evaluated the type of surgery needed.
symptoms and signs:
it vary from patient to other, and it may presented as:
- pain
- bleeding
- tenesmus
- diarrhea
- gases
- anemia 
- weight loss 
- others
advise :
repeat the evaluation again and the resection is advised, as this type of lesions show higher risk for malignant transformation.