Sacrococcygeal teratomas in newborns: peculiarities in diagnostics and treatment of small-sized tumors

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Abstract

Introduction. When revealing a sacrococcygeal tumor in pediatric patient (especially — newborn), a germ-cell tumor (GCT) (mostly — teratoma) should be suspected. Just observation in cases of such tumors of small size, which might look as an option, cannot be recommended.

Aim of study: to reveal the peculiarities of diagnostics and treatment of small-sized sacrococcygeal GCT in newborns.

Materials and methods. We analyzed the data of charts of patients with sacrococcygeal GCT from 2 clinics of St. Petersburg (pediatric surgical hospital CCMCSCHMT and pediatric oncological department of St. Petersburg Oncocenter) for past 15 years (2005–2019). Among 55 newborn patients the size of tumor varied, comprising 14 giant (over 14 cm in diameter), 18 large (10–14 сm in diameter), 21 medium-sized (3–9 cm), and 2 small-sized teratomas (under 3 cm in diameter).

Results. In both cases of small-sized GCT prenatal ultrasound was unable to reveal the tumor. Those patients appeared by surgeon occasionally (being either not transferred to hospital from the delivery house after birth or coming because of some other reason). Both patients underwent radical surgery with excision of coccyx (histological diagnosis being ‘mature teratoma’) and are still under observation of oncologist (with no signs of relapse during 6 months and 21 months). During the same period (2005–2019) there were 5 girls treated in St. Petersburg Oncocenter, with sacrococcygeal GCT first diagnosed at older age (10 months – 2 years 9 months). They all had less favorite course and prognosis (histologic variants being yolk sac tumor or embryonic carcinoma; having remote metastases in 2 cases, with relapse in 1 case, and lethal outcomes in 2 cases).

Conclusion. Small-sized sacrococcygeal GCT in newborns can bear a significant risk of delayed diagnosis with possible further malignization and formation of metastases, so active revealing and active surgical treatment in such cases is needed.

About the authors

Mikhail A. Gopienko

Pavlov First St. Petersburg State Medical University; Children’s City Multidisciplinary Clinical Specialized Center of High Medical Technologies

Author for correspondence.
Email: gopienkoma@mail.ru

assistant professor of the department of pediatric surgery with course of anesthesiology and intensive care; pediatric surgeon

Russian Federation, Saint Petersburg

Svetlana A. Karavaeva

Pavlov First St. Petersburg State Medical University; Children’s City Multidisciplinary Clinical Specialized Center of High Medical Technologies; North-Western State Medical University named after I.I. Mechnikov

Email: svetlana.karavaeva@szgmu.ru

Dr. Sci. (Med.), Professor of the department of pediatric surgery with course of anesthesiology and intensive care; pediatric surgeon; Head of the department of pediatric surgery 

Russian Federation, Saint Petersburg

Viacheslav B. Silkov

North-Western State Medical University named after I.I. Mechnikov; St. Petersburg State Pediatric Medical University

Email: silkucci@mail.ru

Cand. Sci. (Med.), associate professor of the department of oncology, pediatric oncology, and radiotherapy; pediatric surgeon-oncologist of the department of chemotherapy and combined treatment of tumors in children

Russian Federation, Saint Petersburg

Oleg I. Uskov

Children’s City Multidisciplinary Clinical Specialized Center of High Medical Technologies

Email: morphologdgb1@mail.ru

Head of pathology department

Russian Federation, Saint Petersburg

Irina E. Miagkova

Children’s City Multidisciplinary Clinical Specialized Center of High Medical Technologies

Email: morphologdgb1@mail.ru

pediatric pathologist of pathology department

Russian Federation, Saint Petersburg

Margarita B. Belogurova

St. Petersburg State Pediatric Medical University; St. Petersburg Clinical Scientific and Practical Center of Specialized Medical Assistance (Oncological)

Email: deton.hospital31@inbox.ru

Dr. Sci. (Med.), Professor, Head of the department of oncology, pediatric oncology, and radiotherapy; chief of the department of chemotherapy and combined treatment of tumors in children

Russian Federation, Saint Petersburg

References

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Supplementary files

Supplementary Files
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1. JATS XML
2. Fig. 1. Case № 1 of small-sized sacrococcygeal teratoma: а — clinical appearance; b — MRI; c — intraoperative picture; d — appearance 1 month after surgery

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3. Fig. 2. Case # 1 (continued) — histological picture (Hematoxylin and Eosin): а — combination of stratified epithelium (left side) and gastric-type epithelium (right side), ×100; b — pancreatic tissue, ×100; c — brain tissue, ×100; d — hyaline cartilage, ×40

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4. Fig. 3. Case № 2 — of small-sized sacrococcygeal teratoma: а — clinical appearance: aspect, from which the tumor is almost invisible; b — clinical appearance: aspect, from which the tumor is detectable; c — ultrasound picture; d — resected tumor; e — appearance 1 month after surgery

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5. Fig. 4. Case № 2 (continued) — histological picture (Hematoxylin and Eosin): а — pseudostratified columnar ciliated epithelium, ×200; b — cysts with intestinal-type epithelial lining, ×100; c — central nervous system tissues, ×100; d — hyaline cartilage and loose connective tissue, ×40

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