**Question:** False about Patey's Mastectomy.

A. Patey's Mastectomy involves removing the entire breast gland and its surrounding fat tissue.
B. Patey's Mastectomy is a common procedure for breast cancer treatment.
C. Patey's Mastectomy does not preserve the skin envelope.
D. Patey's Mastectomy is a rare and outdated procedure.

**Correct Answer:**

Patey's Mastectomy is a historical term that refers to a radical mastectomy procedure involving the removal of the entire breast gland and its surrounding fat tissue, along with the axillary lymph nodes, and in some cases, the pectoralis major muscle.

This question is testing the understanding of the various types of mastectomy procedures and their key features. Let's analyze each answer choice:

A. **Patey's Mastectomy involves removing the entire breast gland and its surrounding fat tissue.**
- Patey's Mastectomy indeed involves the removal of the breast gland and surrounding fat tissue, but it is not a modern procedure and has been largely replaced by more selective surgical approaches.

B. **Patey's Mastectomy is a common procedure for breast cancer treatment.**
- Patey's Mastectomy is not a common procedure; rather, it represents a radical surgical approach that is rarely used today.

C. **Patey's Mastectomy does not preserve the skin envelope.**
- Correct, Patey's Mastectomy involves the removal of the breast gland and surrounding tissue, including the skin envelope.

D. **Patey's Mastectomy is a rare and outdated procedure.**
- This is indeed accurate; Patey's Mastectomy is rare and outdated due to the development of more modern and targeted surgical techniques for breast cancer treatment.

In conclusion, Patey's Mastectomy is a historical term representing a radical surgical procedure that has been largely replaced by more selective methods for treating breast cancer. The correct answer is D: Patey's Mastectomy is a rare and outdated procedure. Answer choices A, B, and C are incorrect due to the evolving nature of surgical techniques in breast cancer treatment.