Short answer · Medically reviewed summary · Last updated: 2026-05-08

Sacrococcygeal teratoma is a germ cell tumor that develops at the base of the tailbone, often presenting as a visible mass at birth or detected via prenatal ultrasound. The primary symptoms range from a palpable, external lump to complications involving pressure on surrounding organs, requiring careful clinical monitoring and specialized surgical management. What are the primary symptoms of Sacrococcygeal Teratoma? The most characteristic sign of Sacrococcygeal teratoma is a noticeable mass protruding from the sacrococcygeal region.

1 people with Sacrococcygeal Teratoma have shared their first-person experience on this question at DiseaseMaps.

1

Which are the symptoms of Sacrococcygeal Teratoma?

Symptoms of Sacrococcygeal Teratoma reported by real patients, from the most common to the most limiting, plus a medically reviewed summary with sources.

Sacrococcygeal Teratoma symptoms

Sacrococcygeal teratoma is a germ cell tumor that develops at the base of the tailbone, often presenting as a visible mass at birth or detected via prenatal ultrasound. The primary symptoms range from a palpable, external lump to complications involving pressure on surrounding organs, requiring careful clinical monitoring and specialized surgical management.



What are the primary symptoms of Sacrococcygeal Teratoma?


The most characteristic sign of Sacrococcygeal teratoma is a noticeable mass protruding from the sacrococcygeal region. Because these tumors can grow rapidly, they may cause symptoms related to their size and location, including:



  • Visible, palpable mass at the base of the spine.

  • Distension of the abdomen or swelling in the lower extremities.

  • Difficulty with bowel or bladder function due to pelvic pressure.

  • Potential for fetal hydrops (fluid accumulation) if the tumor is large and highly vascular.



How do symptoms vary in severity and progression?


The severity of Sacrococcygeal teratoma symptoms often depends on the tumor's size and its classification (Altman classification types I through IV). Type I tumors are predominantly external, while Type IV tumors are entirely internal within the pelvis, making them more difficult to detect early. Over time, if left untreated, the tumor can grow, potentially leading to high-output cardiac failure in the fetus due to the significant blood flow required by the mass.



When should families seek immediate medical attention?


Immediate medical intervention is necessary if a newborn with Sacrococcygeal teratoma exhibits signs of respiratory distress, severe abdominal distension, or neurological deficits in the lower limbs. Any sudden change in the size or firmness of the mass, or signs of skin ulceration, requires an urgent evaluation by a pediatric surgeon or neonatologist.



How does Sacrococcygeal Teratoma impact daily life?


For the 40 members of our DiseaseMaps.org community living with or affected by Sacrococcygeal teratoma, the journey often involves long-term follow-up to monitor for recurrence. Even after successful excision, patients may experience long-term challenges related to pelvic floor function or bowel/bladder management, which can significantly impact daily quality of life and require multidisciplinary support.



Next steps



  • Consult with a pediatric surgeon or a specialized fetal center for comprehensive management.

  • Join the Sacrococcygeal teratoma community at DiseaseMaps.org to connect with other families.

  • Maintain a strict schedule of follow-up imaging (such as MRI or ultrasound) and blood tests (AFP markers) as recommended by your clinical team.



Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.



References



  • NIH Genetic and Rare Diseases Information Center (GARD): Sacrococcygeal Teratoma.

  • Orphanet: Sacrococcygeal teratoma.

  • OMIM (Online Mendelian Inheritance in Man): Germ cell tumors.

  • Children's Hospital of Philadelphia (CHOP) Fetal Diagnosis and Treatment Center.

Author: DiseaseMaps Editorial Team
Reviewed against authoritative medical sources (NIH GARD, Orphanet, OMIM)
Last updated: 2026-05-08
Medical disclaimer: This information does not substitute professional medical advice. Always consult your doctor before making health decisions.
Source: DiseaseMaps.org
2 answers
This tumor is most often found in newborns, and thus the diagnosis is made before symptoms can be identified. However, in cases where the tumor is completely internal it can take time for symptoms to show. Younger children may experience problems such as urinary or bowel incontinence, as well as pain in their bottom region.

Posted May 21, 2017 by Erin 2150

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My medical journey started when my mother was six and a half months pregnant with me. Her pregnancy was going completely as planned, and she was due to have me on Valentine’s Day. She wasn’t due for another ultrasound for nearly a month, but c...

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