Which is the commonest segment of the breast involved in cancer:
|A||Upper and inner|
|B||Upper and outer.|
|C||Lower and inner|
|D||lower and outer|
(Ref. BAILEY AND LOVE SURGERY 25TH EDN . PG 840)
a. Breast cancer in situ is more common in left breast than right .
b. Similarly invasive carcinoma is also more common on the left side than right.
c. Within the same breast, both insitu and invasive cancer are more common in the upper outer quadrant of the beast as shown in the figure below: