What to know about bilateral mastectomy

The operation may treat cancer affecting one or both breasts, or reduce future breast-cancer risk in selected people. Removing both breasts does not automatically remove every need for other treatment, and the exact operation depends on the diagnosis, lymph-node plan, health, and personal priorities.

The surgeon removes breast tissue on both sides. Depending on what is medically appropriate, the skin or nipples may be preserved, and lymph nodes may be sampled or removed. Reconstruction can sometimes begin during the same operation or be arranged later; choosing no reconstruction and having a flat chest contour is also an option.

Sensation across the chest commonly changes because nerves are cut during surgery. Drains may temporarily remove fluid from the surgical areas. Pathology results from removed tissue help the team confirm the findings and decide whether radiotherapy, medicine, or further surgery should be discussed.

Before surgery, confirm which tissue will be removed, whether lymph nodes are involved, and whether reconstruction is immediate, delayed, or not planned. Tell the team about all medicines and supplements, smoking or vaping, previous operations, allergies, and any shoulder problems. Arrange transport, help at home, loose front-opening clothing, and a safe place for drain supplies if drains are expected.

After discharge, follow the wound, drain, bathing, lifting, and arm-movement instructions from your surgical team. Take prescribed pain relief as directed and build activity gradually. Report new arm or hand swelling because assessment and lymphoedema support may be useful.

Contact the surgical team promptly for increasing redness or warmth, pus, fever, a wound that opens, worsening pain despite medication, sudden swelling of the chest, or a drain that stops working while the area enlarges. Seek emergency help for severe breathing difficulty, chest pain, fainting, confusion, or sudden painful swelling in a leg.

Persistent low mood, panic, distress about body image, or difficulty coping also deserves support. Your cancer team can connect you with counselling, rehabilitation, prosthesis services, or peer support according to what feels useful.

Ask why surgery on both breasts is recommended in your situation, whether breast-conserving surgery is an alternative, what type of mastectomy is planned, and how lymph nodes will be managed. You can also ask how each reconstruction or flat-closure option affects recovery, what chest sensation to expect, when pathology results will be available, and which team number to call after discharge.