<prompt> 38 year old male underwent a tooth extraction at a local dental camp. After few days he develops fever and trismus. On local examination, there is a swelling at the angle of jaw . He has a poor oral hygiene and tonsils were pushed medially .No membranous covering or discharging sinus were seen around tonsils. Most likely diagnosis in this condition would be ?Peritonsillar abscessRetropharyngeal abscessParapharyngeal abscessLudwigs angina  <response>: Parapharyngeal abscess Pharyngomaxillary L ateral pharyngeal space Located between lateral pharyngeal wallmedially and styloid process with its muscular attachments laterally Styloid process along with its muscle attachements divides the paraphyrangeal space into Anterior and Posterior compaments Anterior compament infection: Prolapse of tonsiltonsil is pushed medially Trismus Due to spasm of medial pterygoid muscle Swelling behind the angle of jawclose to anterior 13rd of Sternocleidomastoid muscle Posterior compament infection: Bulge of pharynx Paralysis of cranial nerve IX,X,XI and XII Swelling of parotid region Other options: Retropharyngeal abscess:Present on 1 side of midline and swelling on posterior pharyngeal wall Peritonsilar abscessquinsy: Collection of pus in the peritonsillar space only tonsil is pushed medially and no swelling bulge at angle of jaw 