Primary lipomatous tumor/well-differentiated liposarcoma of the breast with invasion of the pectoralis major muscle: A case report

This report emphasizes the need to differentiate benign lipomas from ALT/WDLS when evaluating breast adipose tissue masses. This case also highlights the importance of early detection and accurate diagnosis, reminding clinicians to remain highly vigilant when facing similar cases and to conduct comprehensive diagnosis and treatment through multidisciplinary evaluation.