Are these symptoms related? right sided deep gluteal syndrome, right sided iliac lymph node pain and small nodule, intermittent fecal incontinence, constipation. can endometriosis cause all of these symptoms?

Not all. These symptoms need further investigation

Usually endometriosis symptoms occur around menstrual period days. Your buttock pain could be one. How was the.nodule near the iliac artery found? Did the radiologist think it was benign? Can we be certain it's causing pain? What kind of follow-up was recommended? These are some questions that I think should be answered for you. Consult a colorectal surgeon to evaluate your fecal incontinence.