Use of multi-detector computed tomographic angiography in the diagnosis of a parapharyngeal aneurysm in a 6-week-old foal.

This research article reports on the successful use of multidetector-row computed tomographic contrast angiography (MDCTA), a scanning method often used in human medicine, to diagnose an aneurysm in a 6-week-old Thoroughbred foal.

Research Objective

• The goal of this research was to explore the potential of using multidetector-row computed tomographic contrast angiography (MDCTA) to investigate a mass in the parapharyngeal region (near the pharynx) of a 6- week-old Thoroughbred foal. This type of angiography has not been previously reported for use in equine patients.

Methodology

• The researchers used a 4-slice helical computed tomography scanner, a sub-type of MDCTA scanner, to examine an oval-shaped mass that was firm and superficial, producing arterial blood when a fine needle aspiration was conducted.

Findings

• The MDCTA enabled the identification of the specific blood vessels involved, facilitated a diagnosis based on the morphology (shape and structure) of the lesion, and greatly aided the surgical planning process.
• After surgery, a histology exam (microscopic examination of tissue) confirmed that the mass was indeed an aneurysm (a bulge in a blood vessel caused by a weak vessel wall).
• The aneurysm contained a mural thrombus (a blood clot that adheres to the wall of a blood vessel) and calcification within its smooth muscle wall – findings that are consistent with a true aneurysm.

Conclusion

• The study concludes that MDCTA was instrumental in providing additional and valuable information than what traditional imaging could offer in the case of vascular masses in the head and neck.
• Therefore, the findings indicate that MDCTA has the potential to improve the diagnosis and aid in the management of similar lesions in future cases.