INTRODUCTION: Idiopathic granulomatous mastitis (IGM) is a benign, inflammatory breast disease that has not been fully elucidated. Pain in the breast, abscess formation and formation of fistula occurs, can mimic carcinoma clinically and histopathologically. In this retrospective study, we aimed to present our surgical treatment results in 5 patients who were admitted to our clinic between 2015 and 2018 with histopathological diagnosis of IGM. MATERIALS: The study included 5 patients who underwent surgery with oncoplastic techniques from 37 patients who were treated in our clinic between February 2015 and March 2018. METHODS: Wide surgical excision of the breast was performed in patients with histopathologically confirmed IGM. After excision, reconstruction of the breast shape and contour was aimed. Mastopexy was preferred for each patient. The preoperative surgical markings were drawn at sitting position . All operations were performed by the same surgical team. The records of the patients were evaluated retrospectively and the results were summarized. CONCLUSION: The mean age of the patients at admission was 33.2 years (SD, 10.44, 22-44 years). Three (60%) of total patients presented with 1 (20%) pain and 1 (20%) with abscess formation. The lesions were located in the upper inner quadrant in 3 patients (60%), in the upper outer quadrant in 1 (20%) patient and in the lower inner quadrant in 1 (20%) patient. Similarly, 3 patients (60%) had lesions in the right breast, while 2 patients (40%) were located in the left breast. The mean mass dimensions were 4.5 cm (SD, 3.16, 2-10 cm range). H & E staining of 10 x in the histopathological evaluation included mixed inflammatory cells and concomitant non-necrotizing granulomas encircling the breast lobules. Our surgical treatment included incision and drainage, excisional biopsy and partial mastectomy. All patients underwent incisional biopsy for preoperative diagnosis and histopathologic diagnosis was made. Drainage and culture antibiogram were sampled for patients with abscess. There was no growth in culture antibiogram in any of the patients. Before surgical treatment, 4 (80%) of 5 patients received additional empirical antibiotics and 2 (40%) received steroid treatment due to IGM (Table-2). Wide surgical excision was planned for all patients due to relapse and total regression. For this purpose, intraglandular flap transposition was performed in 3 (60%) of the patients who underwent partial mastectomy and reconstruction was performed in 2 (40%) of the patients by inferior pedicled reduction mammoplasty. The inferior pedicle technique was used for the masses located in the upper half of the breast. For the other patients a dermoglandular flap transposition technique was used for NAC preservation after wide excision. Findings in our study show that oncolplastic mammoplasty techniques can be used in the surgical treatment of idiopathic granulomatosis mastitis. After extensive excision, oncoplastic breast surgery techniques have been found to be a preferable method for reconstruction in appropriate patients.