1. Knotted nasogastric tube in the posterior nasopharynx: a case report;Hirwa;Qatar Med J,2016
2. A case of fatal internal jugular vein perforation during nasogastric tube insertion;Smith;J Surg Case Rep,2017
3. Pyriform sinus perforation secondary to nasogastric tube insertion;Makay;ANZ J Surg,2008
4. Subcutaneous emphysema to the head and neck: an unlikely traumatic origin;Hajiioannou;Case Reports,2018
5. Subcutaneous emphysema. [Updated 2019 may 12];Kukuruza,2019