Prenatal diagnosis of sacrococcygeal teratoma: analysis of a case series

Authors

DOI:

https://doi.org/10.15574/PS.2025.3(88).1925

Keywords:

sacrococcygeal teratoma, prenatal diagnosis, ultrasound diagnostics, congenital malformations

Abstract

Aim - to characterize the data of pregnant women and the results of prenatal examinations in a case series of fetal sacrococcygeal teratoma, to determine typical anatomical variants and associated pathology.

Materials and methods. A retrospective analysis of the medical records of 32 pregnant patients who were diagnosed with sacrococcygeal teratoma in the fetus, and were examined in years 2013-2025. The most typical variants of tumor’s relative size and echo-structure were analyzed, as well as the rate of associated pathology, and the differences depending on the fetal sex and tumor size.

Results. Among 32 cases associated structural pathology was diagnosed in 15 (46.9%) fetuses, and was represented by malformations of other organs/systems, and by secondary local and systemic pathological changes due to teratoma. The mean maternal age was 27.9±6.1 years, the largest group was represented by women 25-29 years old (43.8%), the mean age of women with male fetuses was significantly higher than with female (32.3±6.7 and 26.5±5.5 years). Ultrasound features were highly variable, most often giant teratomas (40.6%) were diagnosed, tumors with solid-cystic and solid structure (43.8%), and type I according to Altman. Typical echo-structure in tumors of different sizes was characterized. Less than half of the patients (43.75%) were referred to the specialized department before 22 weeks of pregnancy, which is unsatisfactory for such a severe pathology.

Conclusions. Sacrococcygeal teratoma is a rare pathology that was most commonly diagnosed in fetuses of young women, was often associated with other malformations or led to secondary local and systemic pathological changes. Prenatally most severe anatomical variants were frequently diagnosed, such as giant teratomas, solid-cystic and solid tumors, which determines the importance of timely/early referral of pregnant women to specialized centers for further evaluation and optimal choice of management.

The research was carried out in accordance with the principles of the Helsinki Declaration. The informed consent of the patient was obtained for conducting the studies.

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Published

2025-09-28

Issue

Section

Original articles. Neonatal surgery