Streptococcal pharyngitis (Strep Throat)
Neisseria gonorrhoeae
Diphtheria (C. diptheriae)
Bacterial Tracheitis
Infectious mononucleosis (EBV)
Patients with peritonsillar abscess have a 20% incidence of mononucleosis 
Laryngitis
Acute Bronchitis
Rhinovirus
Coronavirus
Adenovirus
Herpesvirus
Influenza virus
Coxsackie virus
Herpangina
Hand-foot-and-mouth disease
HIV (Acute Retroviral Syndrome)
Patients with peritonsillar abscess have a 20% incidence of mononucleosis 
Herpangina
Hand-foot-and-mouth disease
Stevens-Johnson Syndrome
Pemphigus
Angioedema
Deep neck space infection
Retropharyngeal abscess
Ludwig's<unk> 
Parapharyngeal space infection
Peritonsillar Abscess (PTA)
Epiglottitis
Kawasaki disease
Penetrating injury
Caustic ingestion
Lemierre's syndrome
Peritonsillar cellulitis
Lymphoma
Internal carotid artery aneurysm
Oral Thrush
Parotitis
Post-tonsillectomy hemorrhage<unk> 
Acute necrotizing ulcerative gingivitis
Retropharyngeal abscess
Ludwig's<unk> 
Parapharyngeal space infection
Dental fracture
Dental subluxation
Dental avulsion
Bleeding dental socket
Acute alveolar osteitis (dry socket)
Acute necrotizing ulcerative gingivitis (trench mouth)
Dental abscess
Periapical abscess
Periodontal abscess
Ludwig's<unk> 
Pulpitis (dental caries)
Pericoronitis
Peritonsillar abscess (PTA)
Retropharyngeal abscess<unk>  - tonsillitis and pharyngitis
Periapical abscess
Periodontal abscess
Scurvy
Gingival hyperplasia
Phenytoin
Cyclosporine
Nifedipine, Amlodipine
Leukemia
Phenytoin
Cyclosporine
Nifedipine, Amlodipine
Leukemia
Angioedema
Aphthous stomatitis
Herpes gingivostomatitis
Herpes labialis
Measles (Koplik's spots)
Perioral dermatitis
Oral thrush
Steven Johnson syndrome
Streptococcal pharyngitis
Tongue diagnoses<unk>
Vincent's angina
Streptococcal pharyngitis 
Unstable angina
Neisseria gonorrhoeae
Stable angina
Diphtheria 
STEMI equivalents
Bacterial Tracheitis