Age specific histologic types of carcinoma breast in Malaysians.

The influence of age on various histological types of breast cancer at both age <50 years and >50 years to simulate menopause was studied retrospective from 2002 to 2004 in Malaysia. One hundred and fifty five cases were reviewed. Ninety two cases recorded at age <50 years, 60 (65.2%, 95%CI: 54.6 - 74.8%) were infiltrating ductal carcinoma in 11(12.0%, 95% CI: 6.1-20.4%), ductal carcinoma in situ (DCIS) in 9 (9.8%, 95% CI: 4.6-17.8%), medullary carcinoma in 6 (6.5%, 85%CI: 2.4-13.6%), invasive lobular carcinoma in 4 (4.3%, 95%CI: 1.2-10.8%), mucinous carcinoma and poorly differentiated carcinoma in 2 cases (2.2%, 95%CI: 0.3-7.6%). At >50 years of age, 63 cases were recorded. Forty seven (74.6%, 95%CI: 62.0- 84.7%) cases were of infiltrating ductal carcinoma, ductal carcinoma in situ in 9 (14.3%, 95%CI: 6.7-25.4%), mucinous carcinoma in 5 (7.9%, 95%CI: 2.6-17.6%), medullary carcinoma (8.5%) and papillary carcinoma in 1 case each (1.6%, 95%CI: 0.0-8.5%). Infiltrating ductal carcinoma was the commonest histology at both age <50 years and >50 years.