Percutaneous versus Open Fetal Surgical Intervention for Sacrococcygeal Teratomas: Is Less Really More?

INTRODUCTION: Sacrococcygeal teratomas (SCTs) may require in utero intervention for survival. Open surgical intervention (OSI) was first described, but increasing reports of percutaneous intervention (PI) with variable indications and outcomes exist. We reviewed the literature for all published cases of fetal SCT intervention and compared OSI to PI cohorts. METHODS: A keyword search of PubMed was conducted. Inclusion criteria were as follows: data available per individual fetus including gestational age at intervention, type of intervention, primary indication, survival, gestational age at birth, and complications. Complications were grouped into categories: placenta/membrane, procedural, or hemorrhagic. Failure was defined as little/no improvement or recurrence of the primary indication. χ2 analysis was performed for solid tumor PI versus OSI to assess significant trends in these intervention groups. A meta-analysis was not feasible due to small numbers and heterogeneity. RESULTS: Twenty-seven articles met inclusion criteria. In the PI group, 38 fetuses underwent intervention for solid tumors, 21 for cystic tumors, and 3 for solid and cystic tumor components. Among fetuses with solid tumors, OSI was associated with lower need for multiple interventions (0% vs. 31.6%, p = 0.01) and higher survival to discharge (50% vs. 39.5%, p = 0.02). A fetal intervention was performed in the absence of hydrops/early hydrops in 45% of fetuses receiving PI, compared to 21% receiving OSI. Failure to resolve the primary indication was higher in the PI group (55.9% vs. 11.1% OSI, p = 0.02). The overall complication rates were high in both groups (90% OSI, 87% PI), though bleeding was unique to the PI group (26.5%). Preemptive cyst drainage, for purely cystic tumors, was universally successful and associated with a low complication risk (18.2%). CONCLUSIONS: For solid tumors, OSI appears to be superior with regard to survival to discharge, fewer interventions, and lower failure rates. PIs to drain a cyst may facilitate delivery or preempt future complications, though consideration should be given to long-term oncologic outcomes.