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Child With Suspected Excessive Cortisol Production

Home / Clinical Resources / Referral Guidelines / Child With Suspected Excessive Cortisol Production

Clinical Topic

Resource Type

  • Referral Guidelines

Publication Date

June 23, 2021

Contributor

Preneet Brar

PDF Download

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Differential diagnosis for Cushing disease/syndrome

  • Exogenous obesity (typically no associated growth impairment)
  • Depression/ physical stress
  • Polycystic ovary syndrome
  • Uncontrolled diabetes/ alcoholism (in adults)

Additional Information

  • Additional Laboratory Testing:
  • Overnight dexamethasone suppression test: Single dose of 1 mg of dexamethasone given close to 11 pm should suppress the AM cortisol to <1.8 ug/dl (50 nmol/L).
  • Midnight salivary cortisol: Measuring a midnight salivary cortisol measures the free cortisol and is good screening test to rule out Cushings.
  • Low and high dose dexamethasone suppression test.
  • Corticotrophin releasing hormone test.
  • Complete metabolic panel, complete blood count and ESR. Vitamin D levels, calcium and PTH levels. Blood glucose can be elevated and there may be glycosuria as cortisol promotes gluconeogenesis. Frank diabetes and impaired glucose tolerance can develop in children with hypercortilism. Hematological and immune dysfunction, with cortisol stimulating erythropoiesis leading to polycythemia. Lymphopenia and eosinopenia are common. As cortisol affects vitamin D absorption in the intestines and increased loss of calcium from the kidneys there is often osteopenia/osteoporosis.

 

  • Radiological studies:
  • MRI brain with pituitary cuts to image for adenoma if Cushing disease suspected.
  • This condition is rare (1/100,000) and some children will need to be referred to a center which specializes in doing advanced imaging such as Petrosal sinus sampling to localize the pituitary adenoma
  • CT scan or MRI (preferred) if adrenal adenoma or carcinoma is suspected (most common cause of Cushing syndrome in children <7 years)
  • DEXA scan as osteopenia is common in longstanding Cushing syndrome.

 

  • Treatment options:
  • Surgical consultation to a Pediatric neurosurgeon/ surgeon if the cause is a pituitary adenoma or an adrenal tumor/ carcinoma. The first-line treatment for almost all children with Cushing’s disease remains transsphenoidal surgery.
  • Options for Rx include medical management with ketoconazole and mitotane. Radiation therapy usually results in pituitary dysfunction.
  • After surgery the child will need long term monitoring for tumor recurrence as well as replacement with glucocorticoids.

 

Suggested References and Additional Reading:

  • Stratakis CA. Cushing syndrome in pediatrics. Endocrinol Metab Clin North Am. 2012;41(4):793-803.
  • Lodish M. Cushing’s syndrome in childhood: update on genetics, treatment, and outcomes. Curr Opin Endocrinol Diabetes Obes. 2015;22(1):48-54.
  • Lodish MB, Keil MF, Stratakis CA. Cushing’s syndrome in pediatrics: An update.  Endocrinol Metab Clin North Am. 2018;47:451-462.

 

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