Background
Cushing’s syndrome (CS) is a rare and serious disease with high mortality. Patients are often diagnosed late in the course of the disease. Whether defined patient populations should be screened outside the at risk populations defined in current guidelines remains a topic of discussion.
Patients and methods
As part of the prospective German Cushing’s registry, we studied 377 patients with suspected CS. The chief complaint for CS referral was documented. Using urinary free cortisol, late-night salivary cortisol, and the 1 mg dexamethasone suppression test as well as long-term clinical observation, CS was confirmed in 93 patients, and ruled out for the remaining 284.
Results
Patients were referred for 18 key symptoms, of which five were more common in patients with CS than in those where CS was ruled out: Osteoporosis (8% vs. 2%, p = 0.02), adrenal incidentaloma (17% vs. 8%, p = 0.01), metabolic syndrome (11% vs. 4%, p = 0.02), myopathy (10% vs. 2%, p <0.001) and presence of multiple symptoms (16% vs. 1%, p < 0.001). Obesity was more common in patients where CS was ruled out (30% vs. 4%, p <0.001), but recent weight gain was prominent in those with CS. 68 of 93 patients with CS (73%) had typical chief complaints, as did 106 of 284 of patients with rule-out CS status (37%) according to the Endocrine Society practice guideline 2008.
Conclusions
The 2008 Endocrine Society Practice guideline for screening and diagnosis of CS defined at-risk populations that should undergo testing. These recommendations are still valid in 2022.