Extended Menstrual Cyles

Patient: My wife aged 42 (residing in India) is diagnosed about a month back with 2 gynac symtoms – (a) A 55x47x36ms size cyst in Lt. ovary consistent with Chocholate cyst. (b) Diffuse bulky uterus with the evidence of adenomyosis.For last to menstrual cycles she is having prolonged bleeding days (14 days) causing lot of discomfort and mental stress. Local doctor has advised medication “Dinogest” Tablet – Dose 1 daily (Contains Dinogest 2 mg, Excipents – q.s.) for 3 month.I would like to know that by operating and removing “Cyst” will end extended menstrual cycle bleeding days and will this be solution of the problem.