True about Patey mastectomy is

Patey mastectomy The breast and associated structures are dissected en bloc and the excised mass is composed of:The whole breast.A large poion of skin, the centre of which overlies the tumour but which always includes the nipple.All of the fat, fascia and lymph nodes of the axilla.The pectoralis minor muscle is either divided or retracted to gain access to the upper two-thirds of the axilla. The axillary vein and nerves to the serratus anterior and latissimus dorsi (the thoracodorsal trunk) should be preserved. The intercostal brachial nerves are usually divided in this operation and the patient should be warned about sensation changes postoperatively.Ref: Bailey and Love, 27e, page: 876