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    Feasibility of Diffusion-weighted Magnetic Resonance Imaging for Differentiating Idiopathic Granulomatous Mastitis From Malignant Breast Lesions
    (Galenos Publishing House, 2023) Rona, Günay; Arifoğlu, Meral; Voyvoda, Nuray; Kökten, Şermin; Çetin, Kenan
    Objective: Idiopathic granulomatous mastitis (IGM) is an inflammatory breast disease that is often challenging to differentiate from malignancy. This study investigated the role of diffusion-weighted (DW) magnetic resonance imaging in differentiating IGM from malignant breast lesions. Methods: This retrospective study included 82 female patients with IGM [with a mean age of 33.48 years, minimum (min): 22 - maximum (max): 58 years] and 85 female patients with breast cancer (with a mean age of 48.14 years, min: 31 - max: 79 years). The diagnoses of all patients were confirmed by biopsy, including 114 IGM lesions and 115 malignant lesions in the analysis. DW sequences were acquired with b-values of 0 and 1000 mm2/sec on a 1.5 T device. The apparent diffusion coefficient (ADC) values of the lesions were measured manually by placing multiple regions of interest of 50-100 mm2 in the target lesions and contralateral normal parenchyma. Results: The ADC values of both IGM (1.119±0.454x10-3 mm2/s) and malignant lesions (1066±0.610x10-3 mm2/s) were lower than those of normal parenchyma. The ADC values of the mastitis group were significantly higher than the ADC values of the carcinoma group (p=0.00). The inter-observer (r=0.627) and intra-observer (r=0.775) agreement of ADC measurements were strong. Conclusion: DW imaging is a useful noninvasive technique to differentiate between IGM and breast carcinoma.
  • Küçük Resim
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    Relationship of post-treatment radiological findings with relapses in idiopathic granulomatous mastitis patients
    (Kare Publ, 2024) Rona, Günay; Arifoğlu, Meral; Çetin, Kenan; Kundes, Muhammet Fikri
    OBJECTIVE: The aim of this study is to investigate the relationship between post-treatment radiological findings and recurrences in idiopathic granulomatous mastitis (IGM). METHODS: Clinical data, ultrasound (US) and magnetic resonance imaging (MRI) examinations of 160 patients with IGM (mean age 34.6 +/- 7 years; range 20-56 years) who received only steroid or steroid+surgical treatment were evaluated retrospectively. Patients were grouped as radiological complete response (RCR) or radiological incomplete response (RIR). RESULTS: Only in the steroid group, 79 (54.1%) patients were in the RCR group and 67 (45.9%) patients were in the RIR group. Recurrence occurred in 42 (26.3%) patients, 27 (16.9%) in the same breast and 15 (9.4%) in the contralateral breast. Most of the recurrences in the same breast had residual lesions up to recurrence (74.1%). CONCLUSION: Residual lesion after treatment is a risk factor for recurrence, and treatment can significantly reduce recurrences until the lesions disappear. The lesion size on MRI after treatment is not associated with recurrence.