Barw Barw Medical Journal 2960-1959 2023 05 12 Carcinoma in Situ Raised from Fibroadenoma: A Case Series of a Rare Combination 10.58742/bmj.v1i2.28 eng Abdulwahid M. Salih College of Medicine, University of Sulaimani, Madam Mitterrand Street, Sulaimani, Kurdistan, Iraq. abdulwahid.salih@gmail.com Lana R.A. Pshtiwan Department of Radiology, Shorsh Teaching Hospital, Sulaimani, Kurdistan, Iraq. lana.pshtiwan@gmail.com Ari M. Abdullah Sulaimani Teaching Hospital, Sulaimani, Kurdistan, Iraq.. ariabdullah1978@gmail.com Aras J. Qaradakhy Smart Health Tower, Madam Mitterrand Street, Sulaimani, Kurdistan, Iraq. aras.qaradakhy@gmail.com Fahmi H. Kakamad College of Medicine, University of Sulaimani, Madam Mitterrand Street, Sulaimani, Kurdistan, Iraq. fahmi.hussein@univsul.edu.iq Halkawt Omer Ali Smart Health Tower, Madam Mitterrand Street, Sulaimani, Kurdistan, Iraq. halkawt.omer@gmail.com Karzan M. Salih Smart Health Tower, Madam Mitterrand Street, Sulaimani, Kurdistan, Iraq. karzan.salih@gmail.com Hawbash M. Rahim Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey. hawbash.mhamad96@gmail.com Berun A. Abdalla Smart Health Tower, Scientific Affairs Department, Madam Mitterrand Street, Sulaimani, Kurdistan, Iraq. berun.anwer95@gmail.com Marwan N. Hassan Smart Health Tower, Madam Mitterrand Street, Sulaimani, Kurdistan, Iraq. marwan.nasih12@gmail.com Shvan H. Mohammed Kscien Organization for Scientific Research (Middle East office), Hamid Str, Azadi Mall, Sulaimani, Kurdstan, Iraq. shvanh80@gmail.com 2023 04 08 Abstract Introduction Fibroadenomas are the most frequent cause of palpable breast lumps in young women. Although it’s a benign lesion, malignancy can occur in extremely rare cases; this risk is higher in complex fibroadenomas and in patients with a family history of the disease. The aim of the current study is to report a case series of rare combination of two breast tumors (carcinoma in situ within fibroadenoma). Methods This is a retrospective case series study. The cases were managed in a single private center specific for breast diseases. They were evaluated and treated during the four previous years (January 2018-May 2022). It included all patients who had a fibroadenoma with malignant changes. Results The study included nine cases. The mean age was 41 years ranged from 31 to 51 years. Six cases were ductal carcinoma in situ within fibroadenoma and three cases were lobular carcinoma in situ. Conclusion Although fibroadenomas are the most common benign breast mass, it is rarely associated with malignant transformation.