This week’s case is a 6-year-old female neutered Egyptian Mau cat presenting with respiratory distress. What are your differential diagnoses?

Findings
On a lateral radiograph, there is thickening of the tracheal wall and narrowing of the lumen at the thoracic inlet. The nasopharynx is widened and the hyoid apparatus is retracted, consistent with airway obstruction. The pulmonary parenchyma and cardiovascular structures appear normal. The liver appears small.Differential Diagnosis
- Neoplasia – lymphoma, adenocarcinoma
- Granuloma
- Possible microhepatia, not pursued further