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Related Experiment Video

Updated: Apr 30, 2026

Teratoma Generation in the Testis Capsule
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Recurrent retrorectal teratoma.

P Geoff Vana1, Sherri Yong1, Dana Hayden1

  • 1Department of Surgery, Loyola University Medical Center, 2160 South First Avenue, Maywood, IL 60153, USA.

Case Reports in Medicine
|April 30, 2014
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Summary
This summary is machine-generated.

Recurrent sacrococcygeal teratomas can transform into adenocarcinoma, even decades after initial resection. Incomplete coccygectomy during initial surgery may increase recurrence risk, highlighting the importance of complete tumor removal.

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Area of Science:

  • Oncology
  • Pediatric Surgery
  • Pathology

Background:

  • Retrorectal tumors are rare, predominantly affecting neonates and infants.
  • Sacrococcygeal teratomas are the most common type, often presenting as a protruding mass.
  • Complete surgical resection, including coccygectomy, is crucial to prevent recurrence.

Purpose of the Study:

  • To present a rare case of recurrent sacrococcygeal teratoma with malignant transformation.
  • To emphasize the long-term implications of incomplete initial resection.
  • To highlight diagnostic challenges and treatment considerations for recurrent retrorectal tumors.

Main Methods:

  • Case report of a 31-year-old female with a history of sacrococcygeal teratoma resection in infancy.
  • Clinical presentation including lower extremity paresthesias and radiographic findings of a cystic mass.
  • Surgical resection and subsequent histopathological analysis.

Main Results:

  • Pathology confirmed a recurrent teratoma with foci of adenocarcinoma.
  • The patient's initial surgery at 3 days of age did not involve coccygectomy.
  • Recurrence presented 31 years after the initial diagnosis and treatment.

Conclusions:

  • Incomplete resection of sacrococcygeal teratomas, particularly failure to remove the coccyx, may predispose to late recurrence.
  • Recurrent teratomas carry a significant risk of malignant transformation, as seen with adenocarcinoma.
  • Long-term surveillance and complete surgical excision are vital for managing these rare tumors.