en قلب Heart گزارش مورد case report <p>Fibroadenoma is the most common benign mass of breast in females 20-50 years of age. Juvenile fibroadenoma accounts for only 4% of total fibroadenomas. Moreover, the incidence of giant juvenile fibroadenoma is found to be only 0.5% of all fibroadenomas. A 15-year-old woman at the 12th week of gestation was referred to the Shahid Sadoughi Hospital, Yazd, Iran because of a mass in the right breast from one year ago. On Physical examination and imaging, a large mass was found in her right breast. Fine needle aspiration biopsy reported fibroadenoma. Mass enucleation and breast reconstruction were performed. Pathologic examination confirmed a giant fibroadenoma. No serious complications were reported during one-month follow up. The most highlighted point of this presentation was giant size of juvenile fibroadenoma in a pregnant woman. This case report shows that large breast tumors in the adolescent age group can be benign and breast-conserving surgery should be considered in such cases.</p> Breast, Fibroadenoma, Pregnancy, Surgery 130 132 http://ijpho.ssu.ac.ir/browse.php?a_code=A-10-70-124&slc_lang=en&sid=1 Mansour Moghimi Yes Department of Pathology, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Hamid Reza Soltani No General Physician, Scientific Society of Medicine, Yazd branch, Islamic Azad University, Yazd, Iran Mojtaba Babaei Zarch No Student Research Committee, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.