ObjectiveTo explore the clinical efficacy of immediate breast reconstruction with extended latissimus dorsi musculocutaneous flap after nipple and areola sparing modified radical mastectomy for patients with early-middle breast cancer. MethodsSixty patients diagnosed with early-middle breast cancer by needle biopsy from November 2009 to October 2012 in this hospital were divided into two groups according to the surgical method.The breast reconstruction group (30 cases) were performed immediate breast reconstruction with extended latissimus dorsi musculocutaneous flap after nipple and areola sparing modified radical mastectomy, the control group (30 cases) were performed traditional modified radical mastectomy.The postoperative complications, clinical efficacy, quality of life, and recurrence and metastasis were compared in two groups. Results①The ipsilateral breast was completely missing in the control group.The aesthetic effect in the breast reconstruction group was satisfactory including excellent in 22 patients, good in 7 patients, general in 1 patient.②The rates of flaps effusion, flap necrosis, and affectied limb activity limitation had no significant differences in two groups (P > 0.05).The wound healing time, operation area drainage time, hospital stay, and post-operative chemotherapy start time all had no significant differences in two groups (P > 0.05).③The frequency of psycho-logical pressure (inferiority/anxiety/fear) and rate of un-satisfaction of secondary sexual characteristics (body/curve) in the breast reconstruction group were lower than those in the control group (P < 0.001).The rate of social interaction fitness in the breast reconstruction group was higher than that in the control group (P < 0.001).④The following-up time was 12 to 38 months with an average 25 months, one case died because of brain metastasis in the control group, the rest 59 patients had no local recurrence and distant metastasis. ConclusionsThe immediate breast reconstruction with exte-nded latissimus dorsi musculocutaneous flap after nipple and areola sparing modified radical mastectomy can cure cancer on the basis of satisfactory cosmetic results of breast, excellent quality of life of patients, and fewer surgical complica-tions.It does not affect postoperative adjuvant radiochemotherapy and short-and long-term efficacy for breast cancer.