Paratracheal air cyst in a foal

• DOI: 10.1111/eve.13460
• Publication Date: 2021-03-04T07:37:17Z
• Authors: S. Zetterström; K. Horzmann; J. Yin; R. Moon; S. Boorman; S. Ceriotti; A. Wooldridge; L. Boone
• Keywords: Foal; Presentation (obstetrics); Neck mass; Lumen (anatomy)

Summary A 1‐day‐old American Paint Horse was presented for a large air‐filled mass along the ventral aspect of neck. Bronchoscopy and oesophagoscopy revealed no sign communication with trachea or oesophagus. Radiographs computed tomography scan neck identified communicating tract between lumen cystic mid‐trachea. The foal systemically healthy at this initial presentation, delayed removal cyst recommended to allow further maturation prior undergoing general anaesthesia. Upon discharge, continued grow in size became more fluid than requiring repeat centesis draining. then re‐presented 3 weeks age surgical removal. In surgery, direct ligated. Histopathology demonstrated that lining composed squamous epithelium goblet cells occasional ciliated cells. location, morphological features congenital presentation were consistent paratracheal air (PAC). Surgical resection resulted excellent functional cosmetic outcome. Although not previously reported horses, PAC should be included differential diagnosis an equine neonates. Complete excision may result successful