Jejunal tumor made of primary gastrointestinal stromal tumor and metastatic breast carcinoma - an extremely rare case

Author:

Gajanin Radoslav1,Guzijan Aleksandar2,Gajanin Vesna3,Sladojevic Igor3,Eric Zelimir3

Affiliation:

1. University of Banja Luka, Faculty of Medicine, Banja Luka, Republic of Srpska, Bosnia and Herzegovina + University Clinical Center of the Republic of Srpska, Banja Luka, Republic of Srpska, Bosnia and Herzegovina

2. University Clinical Center of the Republic of Srpska, Banja Luka, Republic of Srpska, Bosnia and Herzegovina

3. University of Banja Luka, Faculty of Medicine, Banja Luka, Republic of Srpska, Bosnia and Herzegovina

Abstract

Introduction. The occurrence of synchronous or metachronous malignant epithelial and mesenchymal tumors is rare. Infiltrating ductal breast cancer rarely produces metastasis in the gastrointestinal tract, and when it does, it represents a significant differential diagnostic problem. Morphologically, they can mimic primary cancers localized in the gastrointestinal tract or peritoneum. Case outline. In this paper, we present a female patient with primary, synchronous bilateral breast cancer, which after five years of follow-up had given metastases to the lungs, bones, peritoneum and mesentery, and in a node localized in the small intestine. The node was composed of two malignant components ? a mesenchymal one and an epithelial one. The mesenchymal component had histologic and immunophenotypic characteristics of a gastrointestinal stromal tumor and the epithelial component was morphologically and immunohistochemically identical to the diagnosed primary breast cancer. Because of all this, the nodal tumor mass was interpreted as a primary gastrointestinal stromal tumor of the small intestine, in which the deposit of metastatic ductal breast carcinoma was observed. Conclusion. Metastases of breast cancer in organs of the gastrointestinal tract are encountered rarely, mainly in the terminal stage of the disease. In available literature, a case of metastasis of breast cancer (metastasis of malignant epithelial tumors) in gastrointestinal stromal tumor has not been found.

Publisher

National Library of Serbia

Subject

General Medicine

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