A 'smart' type of Cushing's syndrome.
Cushing's syndrome results from lengthy and inappropriate exposure to excessive concentrations of either endogenous or exogenous glucocorticoids. This case report describes a patient with a novel type of Cushing's syndrome due to the use of party drugs. A 35-year-old woman had gained 8 kg body weight in 5 months and complained of anxiety. She showed a Cushing-like appearance and mild hypertension (blood pressure, BP 150/95 mmHg). She reported daily use of increasing doses of gamma-hydroxybutyric acid (GHB), a popular party drug. ACTH plasma levels were in the upper normal range (41 ng/l), with normal plasma cortisol (0.36 micromol/l). She showed an abnormal overnight 1 mg dexamethasone suppression test (cortisol 0.38 micromol/l). The urinary excretion of free cortisol in 24 h was also increased (0.47 micromol/24 h). CT scanning of the abdomen showed normal adrenals. After stopping GHB intake she lost 7 kg body weight and her BP normalized (BP 135/80 mmHg). GHB is a popular party drug in the Netherlands, but it is also used as a narcotic and for the treatment of narcolepsy. We hypothesize that GHB may bind to the pituitary gland gamma-aminobutyric acid-B receptors leading to ACTH overproduction.
Razenberg
A J
AJ
Sint Franciscus Gasthuis Rotterdam, Department of Internal Medicine, Center for Diabetes and Vascular Medicine, PO Box 10900, 3004 BA Rotterdam, The Netherlands.
Elte
J W F
JW
Rietveld
A P
AP
van Zaanen
H C T
HC
Cabezas
M Castro
MC
D000328:Adult; D003480:Cushing Syndrome / Q000139:chemically induced*; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000652:urine; D006973:Hypertension / Q000139:chemically induced; D012978:Sodium Oxybate / Q000009:adverse effects*; D019966:Substance-Related Disorders / Q000150:complications
D012978:Sodium Oxybate; D006854:Hydrocortisone