The origin of almost all breast pathology is which structure?

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Multiple Choice

The origin of almost all breast pathology is which structure?

Explanation:
The main idea is that almost all breast pathology begins in the terminal ductal lobular unit, the functional glandular unit of the breast. The epithelium lining the terminal ducts and terminal lobules within this unit is where proliferative and neoplastic changes most commonly occur. Because both ductal and lobular diseases—benign proliferative lesions, atypical hyperplasia, and the majority of carcinomas—originate from this epithelium, the origin is the terminal ductal lobular unit. The surrounding stroma is supportive tissue, not the primary source of most epithelial breast diseases.

The main idea is that almost all breast pathology begins in the terminal ductal lobular unit, the functional glandular unit of the breast. The epithelium lining the terminal ducts and terminal lobules within this unit is where proliferative and neoplastic changes most commonly occur. Because both ductal and lobular diseases—benign proliferative lesions, atypical hyperplasia, and the majority of carcinomas—originate from this epithelium, the origin is the terminal ductal lobular unit. The surrounding stroma is supportive tissue, not the primary source of most epithelial breast diseases.

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