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Ectopic adrenals in a sirenomelic fetus
1Department of Pathological Anatomy, Charles University, Pilsen, Czech Republic.
Summary
Sirenomelia, a rare congenital malformation, was diagnosed in a fetus. This case highlights the absence of kidneys and urinary tract development, alongside aberrant adrenal tissue.
Area of Science:
- Reproductive Medicine
- Developmental Biology
- Medical Genetics
Background:
- Sirenomelia, a severe congenital anomaly, is characterized by fusion of the lower limbs.
- This condition is associated with significant urogenital and gastrointestinal abnormalities.
- Early diagnosis and understanding of sirenomelia are crucial for genetic counseling and management.
Observation:
- A fetus diagnosed with sirenomelia exhibited a sympus monopus (fused legs with a single lower limb).
- Normal development was observed in the head, neck organs, thorax, and upper abdomen.
- Key findings included the absence of kidneys, ureters, urinary bladder, and urethra.
Findings:
- The fetus possessed discoid-shaped adrenal glands in their normal anatomical position.
- The large intestine terminated blindly at the sigmoid colon.
- Histological examination revealed that structures near the testes, resembling ovaries, were accessory (aberrant) adrenal glands.
Implications:
- This case underscores the complex interplay of organogenesis in sirenomelia.
- The presence of accessory adrenal tissue suggests potential developmental field defects.
- Further research into the genetic and environmental factors contributing to sirenomelia is warranted.