Breast tuberculosis with bone destruction mimicking breast cancer with bone metastasis: a case report and literature review.

Background: Tuberculosis (TB) poses a significant global health challenge. While the incidence of breast TB (BTB) is relatively low, it can easily be mistaken for breast cancer or breast granulomatous lobulitis, potentially delaying timely intervention. The gold standard for diagnosis consists of Mycobacterium TB culture and Ziehl-Neelsen staining. Treatment typically consists of a combination of anti-TB therapy and surgical intervention.

Case description: Our research group recently reported a case of BTB accompanied by rib bone destruction. Initially, imaging examinations suggested breast cancer with bone metastasis. However, subsequent real-time ultrasound-guided biopsy revealed chronic inflammation with granulomatous inflammation and extensive necrosis, which led to the diagnosis of BTB. Further T cells spot test (T-SPOT) testing predicted the likelihood of the presence of TB infection, and magnetic resonance imaging (MRI) indicated a high likelihood of TB. A biopsy of the breast lesions was performed and subsequent polymerase chain reaction (PCR) analysis of the aspirated specimens confirmed the presence of DNA from the Mycobacterium TB complex, as well as genes associated with rifampicin resistance. These findings led to the definitive diagnosis of BTB complicated by bone destruction. The patient underwent a 4-month course of anti-TB medication, followed by surgical intervention and an additional regimen of anti-TB drugs. Nine months post-surgery, the patient exhibited no indications of recurrence.

Conclusions: The diagnosis of BTB with bone destruction is challenging, and clinicians need to be vigilant not to misdiagnose it as breast cancer or granulomatous lobulitis.