JOURNAL ARTICLE

Cushing syndrome in the McCune-Albright syndrome

Rebecca J Brown, Marilyn H Kelly, Michael T Collins
Journal of Clinical Endocrinology and Metabolism 2010, 95 (4): 1508-15
20157193

CONTEXT: Cushing syndrome (CS) is a rare but potentially fatal feature of McCune-Albright syndrome (MAS). Optimal management, prognostic features, and long-term follow-up of this disorder have not been described.

SETTING: The study was conducted at an academic tertiary care center.

PATIENTS: A total of 112 patients participating in a natural history study at the National Institutes of Health (NIH) were evaluated, and 21 published cases were reviewed.

INTERVENTIONS: Subjects received observation, medical management, or bilateral adrenalectomy.

MAIN OUTCOME MEASURES: We measured prevalence, prognostic factors, and natural history.

RESULTS: The prevalence of CS among NIH patients was 7.1%. The median age at diagnosis was 3 months. Clinical features included "Cushingoid facies" (66.7%), failure to thrive (60.0%), low birth weight (50.0%), liver disease (36.7%), and heart disease (26.7%). Six patients (20.0%) died, four after adrenalectomy. Death was more likely in patients with comorbid heart disease (odds ratio, 13.3; P < 0.05). Of 23 survivors, 13 underwent adrenalectomy, and 10 exhibited spontaneous resolution. Two patients with spontaneous resolution who were tested later in life (3 and 15 yr after resolution) continued to have low-level, autonomous adrenal function with biochemical adrenal insufficiency. Compared to MAS patients without CS, patients with CS were more likely to have a cognitive/developmental disorder (44.4 vs. 4.8%; P < 0.001; odds ratio, 8.8).

CONCLUSIONS: Comorbid heart and liver disease were poor prognostic markers and may indicate the need for prompt adrenalectomy. The high incidence of cognitive disorders indicates a need for close developmental follow-up and parental counseling. Patients with spontaneous resolution of CS may develop adrenal insufficiency, and they require long-term monitoring.

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