Encapsulated Papillary Carcinoma of The Breast: A Case Report of Rare Male Breast Cancer Clinically Presented as Soft Tissue Tumor

Abstract

BACKGROUND: Male breast cancer is a rare condition, accounting for less than 1% of all breast cancers, and infiltrating ductal carcinoma is the most common type. However, Encapsulated Papillary Carcinoma (EPC) in males is a rare type of breast cancer, and the exact etiology is unknown. CASE REPORT: A 66-year-old male presented with a 15x10 cm mobile swelling over the left side of the anterior chest wall, which was clinically and radiologically diagnosed as a soft tissue tumor. Wide local excision of the swelling of the anterior chest wall was performed. Grossly, it was an encapsulated tumor with solid and cystic areas filled with gelatinous material, papillary excrescences, hemorrhage, and necrosis. Microscopic examination revealed Grade 2 encapsulated papillary carcinoma of the left breast. CONCLUSION: This case report highlights the importance of considering male breast cancer as a differential diagnosis in patients presenting with anterior chest wall soft tissue swelling. Keywords: Male breast cancer, encapsulated papillary carcinoma, anterior chest wall swelling.