Supplementary Material for: Giant mature ovarian cystic teratoma in a pediatric patient: case report and literature review

Mature cystic teratomas, also called dermoid cysts, are the most common germ-cell ovarian neoplasms in children. On average, ovarian dermoid cysts are slow-growing neoplasms with a mean size between 6.4 and 7.0 cm that enlarge at a rate of 1.8 mm/year; however, these can reach large dimensions. Giant ovarian tumors are defined as those having a maximum diameter equal to or more than 15 cm; these represent a therapeutic challenge as they increase the risk of wide wound size and surgical invasiveness. In this paper, we present a case of a 10-year-old Hispanic female that complained of abdominal pain, distension, and nausea. Physical examination revealed a mass on the left side of the abdomen and an axial computed tomography found a large pelvic tumor extending to the abdominal region. After a laparotomy approach, pathology evaluation confirmed the diagnosis of mature cystic teratoma. The patient recovered thoroughly and had no complications at a 6-month follow-up. We conducted a literature review including English and Spanish reports about giant ovarian teratomas, we retrieved 16 cases from 2003 to 2023. We concluded that giant ovarian tumors may be underreported, particularly in resource-limited areas where tumors might grow unrecognized, and that English-language bias might play a substantial role in literature reviews involving case reports and case series.