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Subarcuate canal and artery: a case report.

Alberto Grammatica¹, Matteo Alicandri-Ciufelli, Gabriele Molteni

¹Otolaryngology Department, University Hospital of Modena, Via del Pozzo 71, 41100, Modena, Italy. albertogrammatica@libero.it

Surgical and Radiologic Anatomy : SRA

|June 26, 2009

Summary

An unusual subarcuate artery (SAA) variation in a young patient with hearing loss highlights surgical risks. This anatomical anomaly, particularly near the lateral semicircular canal and facial nerve, necessitates careful surgical planning to prevent bleeding.

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Area of Science:

Otolaryngology
Anatomy
Radiology

Background:

Variations in the subarcuate artery (SAA) and its funnel are typically rare and asymptomatic.
Accurate anatomical knowledge is crucial for middle ear surgery.

Observation:

A 15-year-old girl presented with severe bilateral hearing loss and a subarcuate canal exhibiting an unusual course.
This anomaly showed atypical relationships with the lateral semicircular canal and facial nerve.

Findings:

The reported subarcuate artery variation is novel, not previously documented in the literature.
High-resolution computed tomography (HRCT) effectively visualizes intrapetrous vessels and their funnels.

Implications:

This anatomical variation has significant implications for middle ear surgical procedures, especially retro-facial tympanoplasty.
Surgeons must consider SAA variations in surgical planning to mitigate risks of unexpected hemorrhages.
Mandatory use of HRCT is recommended for posterior approaches to the tympanic cavity to identify such anomalies.