Acute rheumatic fever
Scarlet fever
Suppurative complications
Peritonsillar abscess
Mastoiditis
Peritonsillar abscess
Mastoiditis<unk>  (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 angina
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
Vincent's angina
Acute necrotizing ulcerative gingivitis
Retropharyngeal abscess
Ludwig's angina
Parapharyngeal space infection
Angioedema
Aphthous stomatitis
Herpes gingivostomatitis
Herpes labialis
Measles (Koplik's spots)
Perioral dermatitis
Oral thrush
Steven Johnson syndrome<unk> 
Tongue diagnoses
Vincent's angina
Streptococcal pharyngitis
Acute rheumatic fever
Croup
Scarlet fever
Pertussis
Suppurative complications
Rabies
Peritonsillar abscess