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[Terata catydidymus dicephalus: description of a case]
P L Alò1, G Trombetta, P Marcone
1Dipartimento di Medicina Sperimentale e Patologia, Università La Sapienza di Roma.
Pathologica
|March 7, 1998
Summary
This case report details a rare male fetus with dicephalia, a severe form of conjoined twinning (Terata Catydidymus). The fetus exhibited two necks and spines but a single torso, with normal brain development.
Area of Science:
- Medical Genetics
- Developmental Biology
- Teratology
Background:
- Conjoined twinning is a rare developmental anomaly.
- Twins are classified into three types: Terata Catydidymus, Terata Anadidyma, and Terata Anacatadidyma.
- Dicephalia is a rare subtype of Terata Catydidymus with a severe prognosis.
Observation:
- A 15-week male fetus presented with dicephalia, characterized by two necks and spines conjoined distally.
- The fetus had a single chest and abdomen, with fused clavicles and scapulae.
- Rib buds were present between the two spines, while arms and legs were normally formed.
Findings:
- The central nervous system structures were normally developed with two independent cerebral hemispheres.
- This case represents a rare instance of Terata Catydidymus, specifically the dicephalus subtype.
- The occurrence of dicephalia in a male fetus is exceptionally rare.
Implications:
- This case contributes to the understanding of rare conjoined twin malformations.
- Further research into the genetic and environmental factors influencing dicephalia is warranted.
- Understanding such anomalies aids in prenatal diagnosis and counseling.