# Diagnostic Challenges for Clinicians in Lobular Breast Carcinoma With Peritoneal Carcinomatosis: A Case Report of an Immunocompromised Patient

## TL;DR

This case report highlights the diagnostic difficulties in a patient with breast cancer and peritoneal metastases, emphasizing the need for accurate pathological testing.

## Contribution

The paper presents a rare case where peritoneal carcinomatosis was misdiagnosed, stressing the importance of histopathological confirmation.

## Key findings

- The patient had lobular breast carcinoma with peritoneal metastases.
- Peritoneal tuberculosis was diagnosed after surgical biopsy.
- The case illustrates the diagnostic challenges in immunocompromised patients with PC.

## Abstract

Peritoneal carcinomatosis (PC) is a common condition in oncology. The lack of specificity in radiological and clinical characteristics of carcinomatosis makes their etiological diagnosis difficult. Metastatic infiltrating lobular breast cancer with PC is also a common occurrence in daily medical practice. We report the case of a 45-year-old female patient with chronic renal failure undergoing hemodialysis, admitted for lobular breast carcinoma with bone and peritoneal metastases. The surgical exploration including a biopsy revealed peritoneal tuberculosis. The focus of this paper is to discuss the diagnostic traps associated with PC in malignant tumors to highlight the importance of pathological evidence in such cases.