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Updated: May 27, 2025
Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton
Published on: May 7, 2016
The Sesquialter (First and a Halfth) Branchial Cleft Anomaly
Evan J Propst1, Jennifer M Siu1, Susan Blaser2
1Department of Otolaryngology - Head & Neck Surgery, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada.
None:
A 6-month-old presented with a sinus in the neck coursing from below the body of the mandible, between the carotid and parotid spaces, and terminating posterior to the stylomastoid foramen on MRI. Facial nerve monitoring was used, a lacrimal probe was placed in the sinus, an elliptical incision was made in the skin, and the tract was followed to the parapharyngeal space. Pathology demonstrated a keratinous squamous epithelial lining, skin adnexae, and elastic cartilage. Because there were clinical, radiographic, and pathological features intermediate to first and second branchial anomalies, we propose calling this a sesquialter (first and a halfth) branchial anomaly.
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