This document describes the external features of the breast. It discusses the location, shape, extent, deep relations, structures, and development of the breast. Some key points include: - The breast is located in the superficial fascia of the pectoral region and is divided into 4 quadrants, with the upper lateral quadrant being the most common site of breast carcinomas. - The shape can vary from hemispherical to conical or pendulous. It extends from the 2nd to 6th ribs horizontally and 2/3 rests on the pectoralis major muscle. - Structures of the breast include the skin, stroma, and glandular tissue. The nipple and areola are described in detail.