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Persistence of the stapedial artery: a histopathologic study
Summary
Persistent stapedial artery is a rare vascular anomaly. Histopathologic study reveals varying degrees of persistence, sometimes substituting for the middle meningeal artery.
Area of Science:
- Anatomy
- Embryology
- Vascular Biology
Background:
- The stapedial artery, a fetal remnant, typically regresses during development.
- Persistence of the stapedial artery is an uncommon vascular anomaly with fewer than 30 reported cases.
Observation:
- A histopathologic study examined three temporal bones from two patients with persistent stapedial artery.
- The full course of the anomalous artery was traced in the specimens.
Findings:
- In two specimens, a large persistent stapedial artery was observed, replacing the middle meningeal artery.
- In one specimen, a small persistent stapedial artery terminated in the arterial plexus around the facial nerve.
Implications:
- The findings suggest that the stapedial artery can persist to different extents.
- Understanding this anomaly is crucial for embryogenesis and developmental theories.
- Clinical significance relates to potential vascular variations and surgical considerations.