Annett Al Hamadi,Faisel Ikram,Rabbia Khan,Yasser Khattab, Siliconoma a Diagnosing dilemma, A Case Report Surgical Case Reports 2019 2613-5965 http://dx.doi.org/10.31487/j.SCR.2019.05.11 https://www.sciencerepository.org/siliconoma_a_diagnosing_dilemma_a_case_report_SCR-2019-5-111 Abstract: Silicone implants have been widely used for breast reconstruction and augmentation for years. One of the potential complications of these implants is rupture. Once rupture they start a granulomatous foreign body reaction in the surrounding tissue. The resulting mass formation poses diagnostic difficulties for the surgeons, as it mimics cancer. We report a case of 40 years female who underwent bilateral mastectomy and immediate reconstruction with implants, later presented with a mass. We suspect it local recurrence of tumor on initial presentation and radiology. Definitive diagnosis was only made after complete excision of the mass and histopathology report. No further treatment required and patient doing well.Keywords: Siliconoma, mimics local recurrence, diagnostic dilemma