الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Breast cancer has now surpassed lung cancer as the leading cause of global cancer incidence in 2020, with an estimated 2.3 million new cases, representing 11.7% of all cancer cases. It is the fifth leading cause of cancer mortality worldwide, with 685,000 deaths. Among women, breast cancer accounts for 1 in 4 cancer cases and for 1 in 6 cancer deaths, ranking first for incidence in the vast majority of countries (159 of 185 countries) and for mortality in 110 countries.
Surgery is the main line of treatment of breast cancer either breast conserving surgery (BCS) or modified radical mastectomy (MRM). Common complications of mastectomy include, wound infection, hemorrhage, flap necrosis, lymphedema, injury to the thoracodorsal nerve or the long thoracic nerve of Bell and dog ear deformity.
Patients often find dog ears aesthetically objectionable, and sometimes report pain and discomfort, a lateral breast dog ear is frequently seen in breast surgery patients with a high body mass index, large breast size, such dog ears may cause, a sensation of fullness or heaviness, interference with arm movement, and difficulty fitting a brassiere or clothing.
The aim of the study was to compare between smiley incision technique and elliptical incision technique for avoidance of dog ear formation during mastectomy in patients having large sized breasts who were expected to have a dog ear during mastectomy operation.
This study was conducted on 60 female patients with breast cancer admitted to the Surgical Oncology Unit, Alexandria Main University Hospital, who were indicated to modified radical mastectomy (MRM); with large sized breast and expected to have a dog ear deformity after mastectomy. All patients were selected into to equal groups according to type of incision technique:
group (A): Smiley incision technique; 30 patients.
group (B): Elliptical incision technique; 30 patients.
It was found that smiley incision was better than elliptical technique because of less risk of complications and more patient satisfaction.