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Related Experiment Video

Updated: Jun 3, 2026

Sectioning Mammary Gland Whole Mounts for Lesion Identification
09:22

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Published on: July 24, 2017

Granulomatous mastitis: the histological differentials.

Maribel Lacambra1, Tu Anh Thai, Christopher C F Lam

  • 1Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, China.

Journal of Clinical Pathology
|March 10, 2011
PubMed
Summary
This summary is machine-generated.

Accurate diagnosis of granulomatous mastitis is crucial. This study found tuberculous mastitis (TBM) presents in younger patients with larger lesions and more necrosis, while idiopathic granulomatous mastitis (IGM) shows more plasma cells.

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Area of Science:

  • Pathology
  • Oncology
  • Infectious Diseases

Background:

  • Distinguishing between idiopathic granulomatous mastitis (IGM) and tuberculous mastitis (TBM) is essential for effective management.
  • Accurate diagnosis is challenging, particularly in cases with negative microbiological studies.
  • Histological features are compared in a large cohort to aid differentiation.

Purpose of the Study:

  • To compare the histological features of IGM and TBM.
  • To identify distinguishing characteristics that aid in differentiating between IGM and TBM, especially when microbiological tests are inconclusive.

Main Methods:

  • Retrospective analysis of histopathology files from two hospitals over an 8-year period.
  • Inclusion of 29 IGM and 33 TBM cases.
  • Assessment of patient age, lesional size, symptoms, and histological findings (inflammatory cells, granulomas, necrosis, giant cells, fibrosis, calcifications).

Main Results:

  • Tuberculous mastitis (TBM) occurred in younger patients (p<0.05) with significantly larger lesions (p<0.01) compared to IGM.
  • Histologically, TBM showed more fibrosis, eosinophils, and necrosis, whereas IGM had more plasma cells.
  • No significant differences were observed in mass presentation or local/systemic symptoms; granuloma and giant cell characteristics were not distinguishing.

Conclusions:

  • TBM is associated with younger age and larger clinical masses.
  • Histological differences include more eosinophils and necrosis in TBM, and more plasma cells in IGM.
  • Histological features like granuloma type and giant cells are not reliable for distinguishing between TBM and IGM.