PMC5579563_01
CT scan images (from left to right: sagittal, transverse and dorsal plane): the mass-type lesion (short arrows) extends dorsally to the first tracheal rings and larynx, causing right lateral deviation of the proximal trachea and oesophagus; the deviation of the intraoesophageal tube appears evident (long arrows).
OpenVetJ-7-235-g001.jpg
PMC5579563_01_OpenVetJ-7-235-g001.jpg
F1
Pfizer), cephalexin (ICFVET; ICF), carprofen (Rimadyl; Pfizer) and prednisone (Deltacortene; Bruno Farmaceutici SPA) without significant clinical improvement. Previous CT scan investigation of the neck region performed by primary veterinary surgeon had revealed the presence of a space-occupying lesion 3x1x5 cm dorso-lateral to the trachea (Fig. 1).
Laryngoscopy image: The extraluminal mass distorts the normal laryngeal architecture causing narrowing of the glottis lumen (arrows) and bilateral laryngeal paralysis.
OpenVetJ-7-235-g002.jpg
PMC5579563_01_OpenVetJ-7-235-g002.jpg
F2
The rima glottidis appeared of abnormal shape due to severe dorso-lateral compression suggestive of the presence of an extraluminal space-occupying mass at the right side (Fig. 2).
Histology image: Portion of skeletal muscle with markedly distorted architecture and mild inflammatory changes. Myofibers show severe variations in size, shape and staining affinity. Disarray of orientation is evident, with fibres in transverse, longitudinal and oblique section. Degeneration, regenerative changes and fibrosis are also evident (H&E stain, 10X).
OpenVetJ-7-235-g003.jpg
PMC5579563_01_OpenVetJ-7-235-g003.jpg
F3
Histopathological examination of samples obtained from the mass was similar to previous results of incisional biopsy examination (Fig. 3).