Introduction
Poland syndrome is characterized by the absence or underdevelopment of the pectoralis muscle and breast tissue, resulting in significant breast asymmetry and psychological distress. This report presents the case of a 21-year-old female with Poland syndrome who underwent a successful two-stage implant-based breast reconstruction.

Case Details
The patient sought correction of breast asymmetry due to an underdeveloped left breast and absent pectoralis muscle. A two-stage reconstruction was performed, beginning in March 2024 with the placement of a tissue expander. The expander was gradually inflated to 600cc, creating adequate space for the final implant.

Outcome
In June 2024, the tissue expander was replaced with a 500cc silicone implant. A mastopexy was performed on the right breast, and the left nipple was medialized to achieve symmetry. The patient recovered well and was discharged three days postoperatively. Follow-up visits showed excellent aesthetic results, with the patient reporting high satisfaction and improved self-confidence.

Conclusion
This case demonstrates the effectiveness of a staged implant-based approach for breast reconstruction in Poland syndrome. The combined use of a tissue expander, implant placement, and contralateral breast modification achieved satisfactory symmetry and significantly improved the patient’s quality of life. This method provides a reliable option for addressing breast asymmetry in similar cases.