All the following structures are preserved in modified radical mastectomy except ?
**Core Concept**
The **modified radical mastectomy** is a surgical procedure for breast cancer that aims to remove the tumor while preserving some structures to reduce morbidity. It involves the removal of the breast, underlying fascia, and some axillary lymph nodes. The goal is to balance oncological safety with preservation of function and cosmesis.
**Why the Correct Answer is Right**
In a modified radical mastectomy, the **pectoralis minor muscle** is often removed or divided to access the axillary lymph nodes, but the **pectoralis major muscle** is preserved. The **axillary vein**, **serratus anterior muscle**, and **long thoracic nerve** are also preserved to maintain arm function and reduce the risk of complications like lymphedema.
**Why Each Wrong Option is Incorrect**
**Option A:** This choice would be incorrect if it involved a structure typically preserved, such as the pectoralis major muscle or nerves like the long thoracic nerve.
**Option B:** Similarly, this would be incorrect if it mentioned preservation of a structure that is indeed spared in the procedure.
**Option C:** This option is incorrect if it refers to a structure that is preserved, highlighting the importance of precise anatomical knowledge.
**Option D:** If this option mentioned a structure that is removed or not preserved, it could potentially be correct, depending on the specific structures listed in the options.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the **modified radical mastectomy** preserves more structures than a radical mastectomy, aiming to reduce morbidity while still achieving oncological control. The preservation of the **pectoralis major muscle** and **serratus anterior muscle** helps maintain shoulder function.
**Correct Answer:** Correct Answer: D. Pectoralis minor muscle