Metachronous Metastatic Invasive Breast Carcinoma and Metastatic Small Cell Carcinoma Clinically and Radiologically Favoured to Be of Pulmonary Origin: A Case Report
Background: In patients with metastatic breast carcinoma, newly identified visceral or pulmonary lesions may represent progression of the known malignancy or, less commonly, a distinct second primary tumor. Histopathological and immunohistochemical evaluation is therefore essential for establishing tumor lineage and gu...