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mastectomy

American  
[ma-stek-tuh-mee] / mæˈstɛk tə mi /

noun

Surgery.
  • mastectomies
    plural
  1. the operation of removing all or part of the breast or mamma.


mastectomy British  
/ mæˈstɛktəmɪ /

noun

  1. the surgical removal of a breast

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

mastectomy Scientific  
/ mă-stĕk′tə-mē /
  1. Surgical removal of all or part of a breast, performed as a treatment for cancer.

  2. ◆ A radical mastectomy includes excision of the underlying pectoral muscles and regional lymph nodes.


mastectomy Cultural  
  1. The surgical removal of a breast.


Other Word Forms

Derived Forms

Inflected Forms

Nouns


Etymology

Origin of mastectomy

First recorded in 1920–25; mast- + -ectomy


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

One early client, Soren Aldaco, recalled Campbell sitting in the smoking section of the cafe where she worked, intently listening to what she alleged was a botched double mastectomy.

From The Wall Street Journal ● Sep. 26, 2026

In March 2025, she underwent a double mastectomy, calling the decision one of the hardest she’s ever made.

From Los Angeles Times ● Sep. 26, 2026

As far as Pam knows, her mastectomy was necessary.

From BBC ● Sep. 17, 2026

Despite those limitations, the researchers conclude, "Vitamin D deficiency is associated with a higher occurrence of moderate to severe postoperative pain and increased opioid consumption in patients undergoing unilateral modified radical mastectomy."

From Science Daily ● Sep. 14, 2026

They put her in a hospital, where Marie had a radical mastectomy, chemotherapy and radiation.

From How and When to Be Your Own Doctor by Steve Solomon

His unregulated "cleavage-sparing" mastectomies meant the disease returned in many of his patients.

From BBC ● Sep. 26, 2026

For example, some women who had undergone unnecessary mastectomies could be offered breast reconstruction surgery as they previously should have been, Russell said.

From BBC ● Sep. 24, 2026

While there’s no comprehensive data charting prophylactic mastectomies among young people, some surgeons described shifts that have led to changes in their patient demographics.

From The Wall Street Journal ● Jun. 7, 2026

She said she has seen a 30% increase in women ages 30 to 35 coming in for reconstruction after prophylactic mastectomies in the past three years.

From The Wall Street Journal ● Jun. 7, 2026

On the floors above Delivery, in flowerless rooms, women lay recovering from hysterectomies and mastectomies.

From "Middlesex: A Novel" by Jeffrey Eugenides

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