Duodenal Obstruction as First Presentation of Metastatic Breast Cancer

Figure 2

(a) Section from the duodenal biopsy showed infiltration of the lamina propria by poorly differentiated neoplastic cells with rare cells exhibiting intracytoplasmic lumen with mucin or eccentric nuclei suggesting a poorly differentiated adenocarcinoma. The neoplastic cells where positive for CK (AE1/AE3), CK7, and (b) ER and negative for PR. The morphology as well as immunohistochemical studies were consistent with poorly differentiated adenocarcinoma.

(a)

(b)