sick building syndrome;  SBS
 respiratory distress syndrome
 economy class syndrome (occurrence of deep vein thrombosis in air travelers)
 Asperger syndrome;  Asperger's syndrome;  Asperger's
 sleep apnea syndrome;  SAS
 Tourette syndrome;  Tourette's syndrome
 Korsakoff's syndrome;  Korsakoff's psychosis
 chronic fatigue syndrome;  CFS
 hyperventilation syndrome
 irritable bowel syndrome;  IBS
 Cotard's syndrome (mental disorder);  Cotard's delusion
 acquired immune deficiency syndrome;  AIDS
 premenstrual syndrome;  PMS
 lunchmate syndrome;  mental state of being afraid of being seen eating by oneself
 Marfan syndrome;  Marfan's syndrome
 severe acute respiratory syndrome;  SARS
 longing to get back in the spotlight
 polycystic ovary syndrome
 Sjogren's syndrome;  Sjogren's disease
 acute coronary syndrome;  ACS
 Sunday night blues;  Sunday night syndrome;  Sunday night depression
 sudden infant death syndrome;  SIDS;  cot death;  crib death
 cold syndrome;  common cold syndrome
 hemolytic-uremic syndrome;  HUS
 primary immunodeficiency syndrome
 Restless Leg Syndrome;  RLS
 severe fever with thrombocytopenia syndrome;  SFTS
 insulin-resistance syndrome
 sudden infant death syndrome;  SIDS
 Brugada syndrome (genetic condition resulting in increased risk of sudden cardiac arrest)
 cerebrospinal fluid hypovolemia;  CSF hypovolemia;  intracranial hypotension syndrome
 primary immunodeficiency syndrome
 Paris syndrome (psychological problems associated with living in Paris)
 Twin-to-twin transfusion syndrome;  TTTS
 general adaptation syndrome
 acute radiation syndrome;  ARS;  acute radiation sickness
 Chinese restaurant syndrome;  CRS
 fetal alcohol syndrome;  FAS
 retired husband syndrome;  stress syndrome resulting from one's husband being at home
 kabuki syndrome;  kabuki makeup syndrome
 sinobronchial syndrome;  SBS
 sick school syndrome;  medical symptoms that occur when inside a school (due to building materials, cleaning chemicals, etc.)
 PET bottle syndrome;  insulin deficiency allegedly caused by high consumption of drinks from plastic bottles
 thoracic outlet syndrome;  TOS
 complex regional pain syndrome;  CRPS
 Middle East Respiratory Syndrome;  MERS
 Loeys-Dietz syndrome;  LDS
 Loeys-Dietz syndrome;  LDS
 congenital central hypoventilation syndrome;  CCHS
 smile mask syndrome;  state of constantly smiling and suppressing one's emotions
 Havana syndrome (unexplained symptoms experienced by American embassy staff)