Delayed Recurrent and Bilateral Breast Cancer in Patients With Partial Poland's Anomaly: Report of 2 Rare Cases and Review of the Literature

Consultations for Poland Syndrome: The Essentials for a Thoracic Surgeon

Poland syndrome (PS) is a rare congenital musculoskeletal entity occurring in approximately 1 in 30,000 newborns that manifests with variable symbrachydactyly, ipsilateral costochondral deformities, an absence of pectoral muscles, and breast underdevelopment. These have potential impacts on social, somatic, and psychological functionality, often leading affected individuals to seek expert opinions on corrective surgery. Due to phenotypic variability, strict management guidelines are lacking, with treatment decisions often based on the specialist's personal experience rather than published evidence. Comprehensive imaging with CT and MRI with 3D reconstruction is crucial for providing a descriptive assessment of musculoskeletal defects. Management is multidisciplinary, involving thoracic, plastic, and pediatric surgeons and hand surgery specialists, as well as psychologists and developmental growth specialists. Surgery should achieve both structural and cosmetic correction to reverse the psychological and social impact and achieve patient satisfaction. We aim to provide thoracic surgeons the essential answers for sharing with affected adult individuals during consultations focusing on chest surgical correction.

Poland’s syndrome and breast cancer: coincidence or not?

Poland’s syndrome is an uncommon congenital anomaly of unknown etiology, the main characteristic of which is the absence of the major pectoral muscle. Thorax and upper limb malformations also may be present. Poland’s syndrome has been observed in clinical cases connected to a variety of neoplasia, primarily hematological disorders. Patients with Poland’s syndrome who have developed breast cancer have been reported incidentally. Here we report a case of Poland’s syndrome associated with breast cancer.

A Case of Breast Cancer in a Patient with a Congenital Pectoralis Muscle Defect

Congenital pectoral muscle defects are very rare, and when accompanied by limb defects, they are called Poland syndrome. A woman in her 70s, 4 years after partial mastectomy for breast cancer, underwent mastectomy for a local recurrence. During the operation, the pectoralis major and minor muscles were found to be defective. However, the patient did not have any limb defects. Although congenital pectoral muscle defects are very rare, it would be better to confirm defects of the pectoral muscle by preoperative diagnostic imaging such as CT because the postoperative treatment may be affected.

Developmental disorders and malformations of the breast

Developmental abnormalities and malformations of the breast are rare and encompass a variety of genetic, syndromic, acquired and sporadic conditions. Abnormalities in development may include irregularities in the nipple areolar complex and/or the underlying glandular tissue, resulting in under or overdevelopment of breasts. Age of presentation and clinical severity is dependent on the underlying biologic cause. Abnormalities may involve the entirety of unilateral or bilateral breasts, particularly in association with syndromic conditions or endocrine abnormalities. Disordered development may also be focal, resulting in tumor-like lesions such as hamartomas, pseudoangiomatous stromal hyperplasia and gynecomastia. In this review, we discuss the disorders of breast development including etiologies, clinical presentations and corresponding histopathologic features.