# Study of the Nasal Cavity of the Cadaveric Yellow-Legged Gull (Larus michahellis atlantis) Through Anatomical Cross-Sections and Computed Tomography

## TL;DR

This study uses CT scans and cross-sections to describe the nasal anatomy of yellow-legged gulls, helping diagnose nasal diseases in seabirds.

## Contribution

The study provides a detailed anatomical and radiological reference for the nasal cavity of yellow-legged gulls using CT and cross-sections.

## Key findings

- CT imaging clearly identified nasal structures like conchae, septum, and infraorbital sinus in yellow-legged gulls.
- Combining CT with anatomical cross-sections improved visualization of nasal architecture and spatial relationships.
- The study offers a reference for diagnosing nasal and sinus diseases in seabirds using imaging techniques.

## Abstract

Modern imaging techniques, such as computed tomography (CT), have become valuable tools for veterinarians and researchers studying avian anatomy and disease. This study used CT and anatomical cross-sections to describe the nasal cavity and sinuses of the yellow-legged gull (Larus michahellis atlantis), a seabird commonly found across Europe and North Africa. By comparing CT images with anatomical sections, the main nasal structures, including the rostral, middle, and caudal nasal conchae, the nasal septum, and the infraorbital sinus, were clearly identified. This combined approach allowed accurate visualization of internal nasal features that are difficult to assess by dissection alone. The findings provide a detailed anatomical reference that can assist in diagnosing nasal and sinus diseases in gulls and other seabirds.

Understanding the anatomy of the avian nasal cavity and paranasal sinuses is essential for diagnosing respiratory diseases and interpreting imaging findings. However, detailed tomographic descriptions of these structures are scarce in seabirds. This study aimed to provide an anatomical and radiological characterization of the nasal cavity and associated sinuses of the yellow-legged gull (Larus michahellis atlantis). Computed tomography (CT) was performed on eight cadaveric specimens using a 16-slice helical scanner with bone and pulmonary window settings. Anatomical cross-sections of the same heads were subsequently obtained to correlate and validate CT findings. CT imaging clearly delineated major nasal structures, including the rostral, middle, and caudal nasal conchae, the nasal septum, and the infraorbital sinus, as well as their connections to adjacent cranial bones. The integration of CT and anatomical cross-sections provided detailed spatial relationships and accurate visualization of the internal nasal architecture. This study demonstrates the value of CT for examining avian cranial anatomy and provides a morphological reference framework that may aid in diagnosing nasal and sinus pathologies in seabirds.