Change of HER2 status during disease recurrence predicts good prognosis for primary squamous cell carcinoma of the breast: A case report

AbstractRationale:Primary squamous cell carcinoma (PSCC) of the breast is one of the least common types of breast cancer. Adjuvant treatment for PSCC remains an unresolved issue.Patient concerns:We reported a case of a 48-year-old postmenopausal female patients with a 2 × 2.5 cm lump presented with