A Case of Dog with Lung Lobe Torsion Suspected to Be Related to Tracheal Collapse

Abstract

A 10-year-old, ovariohysterectomized female Maltese with tracheal collapse presented with a cough. Thoracic radiographs revealed tracheal collapse from the cervical to pectoral region and less pneumatization of the right middle lung lobe (Day 1). The dog received initial treatment, but the symptoms worsened (Day 2). Lung lobe torsion (LLT) of the right middle lung lobe was diagnosed as a result of ultrasonographic and CT examinations. The affected lobe was resected. Histopathological examination revealed congestion. Immediately after the recovery from the anesthesia, the dog showed severe stridor and lapsed into dyspnea due to tracheal collapse. LLT is a rare disease, while tracheal collapse is a typical respiratory disease. This case suggested the risk of LLT in the dog with airway collapse.