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Lumbar Fetiform Teratoma: Limb in the Back - A case report
Mohammad Tahir Aien1, Naqibullah Foladi2, Mohammad Saboor Rastin3
1Radiology Department, Kabul University of Medical sciences, Kabul, Afghanistan.
Radiology Case Reports
|January 3, 2022
Summary
This study describes a rare fetiform teratoma in a neonate, presenting as a lumbar mass resembling an extremity. Early differentiation from fetus in fetu is crucial for prognosis and treatment.
Area of Science:
- Developmental biology
- Pediatric surgery
- Medical imaging
Background:
- Teratomas are congenital neoplasms arising from embryonic germ layers.
- Fetiform teratoma is a rare, highly differentiated subtype.
- Congenital masses require accurate diagnosis for appropriate management.
Observation:
- A 1-day-old neonate presented with a lumbar mass.
- The mass grossly resembled an extremity.
- CT scan revealed a highly organized skeletal structure within the mass.
Findings:
- The observed skeletal structure consisted of flat, long, and short bones, characteristic of an extremity.
- This presentation is consistent with a fetiform teratoma.
- Absence of an axial skeleton differentiated it from fetus in fetu.
Implications:
- Accurate differentiation between fetiform teratoma and fetus in fetu is critical.
- These conditions have distinct prognostic outcomes.
- Surgical excision is the recommended treatment for both entities.

