You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which type of breast carcinoma is bilateral and multicentric? and explain in detail?
1Ans: b (Lobular) Ref: Bailey, 24thMost Ca breast are adenocarcinoma.Types:* Ductal: in situ invasive* LobularMost common type: invasive ductal typeDuctal carcinoma arises from epitheliumColloid carcinoma--Cells produce abundant mucinMedullary Ca-- Solid sheets of large cells often associated with marked lymphocytic reactionInfiltrative Ca-- Rare highly aggressive Ca that present as a painful swollen breast with cutaneous odema.Tubular CaBreast carcinoma with good prognosis even with axillary lymph nodes--medullary CaBulls eye appearance is seen in - invasive lobularDesmoplastic reaction is shown by - ductal invasiveComedo carcinoma is - ductal carcinoma in situ (DCIS)Most common variant of breast carcinoma- ductal invasiveLobular carcinoma - multicentric and bilateralThe underlying lobular architecture can still be recognised on microscopic examination "Indian file pattern" is seen