Type of breast tumour with the best prognosis is
|C||Adenoid cystic carcinoma|
a. Medullary carcinoma is a special-type breast cancer; it accounts for 4% of all invasive breast cancers and is a frequent phenotype of BRCA-1 hereditary breast cancer.
b. Grossly, the cancer is soft and hemorrhagic.
c. A rapid increase in size may occur secondary to necrosis and hemorrhage.
d. Approximately 50% of these cancers are associated with DCIS, which is characteristically present at the periphery of the cancer, and fewer than 10% demonstrate hormone receptors.
e. Women with this cancer have a better 5-year survival rate than those with NST or invasive lobular carcinoma.
f. Tubular carcinoma is another special-type breast cancer and accounts for 2% of all invasive breast cancers.
g. Distant metastases are rare in tubular carcinoma and invasive cribriform carcinoma.
h. Mucinous carcinoma (colloid carcinomA., another special-type breast cancer, accounts for 2% of all invasive breast cancers and Typically presents in the elderly population as a bulky tumor.
i. This cancer is defined by extracellular pools of mucin, which surround aggregates of low-grade cancer cells.
j. Lymph node metastases occur in 33% of cases and 5- and 10-year survival rates are 73 and 59%, respectively.