How are sacrococcygeal teratomas diagnosed?

Updated: Nov 22, 2019
  • Author: Chad A Hamilton, MD; Chief Editor: Yukio Sonoda, MD  more...
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Sacrococcygeal teratomas may be diagnosed antenatally during routine ultrasounds, fetal anomaly scans, or when the mother presents with clinical symptoms such as size greater than dates or polyhydramnios. [2]  Those not diagnosed antenatally present in 2 patterns. The most common pattern is in neonates, who present with a large, predominantly benign tumor protruding from the sacral area that is noted prenatally or at the time of delivery. Less commonly, the newborn may exhibit only asymmetry of the buttocks or present at 1 month to 4 years of age with a presacral tumor that may extend into the pelvis. Symptoms of bladder or bowel dysfunction may be present. The latter group is at a significantly higher risk for malignancy. [18]

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