Description
This comprehensive academic article, co-authored by Dr. Aaron Michels from the University of Colorado Denver and Dr. Nicole Michels, provides a detailed overview of primary adrenal insufficiency, known as Addison's disease. The paper focuses on autoimmune adrenatitis as the most common etiology in the developed world, outlining the stages of its pathogenesis from genetic predisposition to overt adrenal crisis. It details the subtle and often nonspecific clinical features, such as fatigue, anorexia, hyperpigmentation, and salt craving, which necessitate a high index of suspicion for diagnosis. The article thoroughly explains the diagnostic algorithm, centering on the cosyntropin stimulation test as the first-line confirmatory investigation, supported by measurements of adrenocorticotropic hormone, renin, and aldosterone levels. The core of the management discussion covers lifelong hormone replacement therapy, including glucocorticoid options like hydrocortisone or prednisone and the mineralocorticoid fludrocortisone, with titration guided by clinical symptoms and laboratory parameters. A critical component is patient education on stress-dose glucocorticoid adjustment during illness or procedures, and the need for emergency injectable steroids. The review also emphasizes the importance of lifelong vigilance for associated autoimmune disorders, such as thyroid disease, type 1 diabetes, and celiac disease, which occur in up to half of affected individuals. This resource is essential for medical students, postgraduate trainees in endocrinology and internal medicine, and clinicians aiming to solidify their understanding of the pathophysiology, accurate diagnostic workup, and nuanced, lifelong management of this life-threatening endocrine disorder. It serves as an authoritative study and reference guide. Review this detailed paper to enhance your clinical competency in managing adrenal insufficiency.
What's inside
April 1, 2014 ◆ Volume 89, Number 7 www.aafp.org/afp American Family Physician 563 Addison Disease: Early Detection and Treatment Principles AARON MICHELS, MD, University of Colorado–Denver, Aurora, Colorado NICOLE MICHELS, PhD, Rocky Vista University, Parker, Colorado M ore than 150 years ago, Thomas Addison described a group of patients with ane mia and diseased adrenal glands at autopsy, a condition now known as primary adrenal insufficiency. Autoim mune adrenalitis is the most common cause of primary adrenal insufficiency, or Addi son disease, in the United States. Less com mon causes include infection, hemorrhage, metastatic cancer, medication use, and adrenoleukodystrophy. Autoimmune adrenalitis is a disorder in which the adrenal cortex is destroyed, result ing in the loss of mineralocorticoid, gluco corticoid, and adrenal androgen hormone production. Addison disease can be part of the autoimmune polyglandular syndromes (type 1 and 2), or it may present as an iso lated disorder.1 This article focuses on the diagnosis and treatment of Addison disease as an isolated disorder, with a focus on the pathophysiology and treatment consider ations of autoimmune adrenalitis. Pathogenesis Autoimmune adrenalitis can be divided into stages of progression2,3 (Table 13). As the disease develops, individuals lose adrenocor tical function over a period of years. In the first three stages, the human leukocyte anti gen genes confer genetic risk; an unknown precipitating event initiates antiadrenal auto immunity; and 21-hydroxylase antibodies are produced, which predict future disease. The production of these antibodies can precede symptom onset by years to decades, and they are present in more than 90% of recent-onset cases.2,4-7 In the fourth stage, overt adrenal insufficiency develops. One of the first meta bolic abnormalities to occur is an increase in plasma renin level, followed by the sequential development of other abnormalities, includ ing a decreased response to adrenocortico tropic hormone (ACTH) stimulation in the fifth stage. If symptoms of adrenal insuf ficiency are present but go undiagnosed, an addisonian crisis can occur. Clinical Diagnosis Because the estimated prevalence of Addison disease is one in 20,000 persons in the United States and Western Europe, a high clinical suspicion is needed to avoid misdiagnosing a life-threatening adrenal crisis.8 Signs and symptoms can be subtle and nonspecific. Primary adrenal insufficiency, or Addison disease, has many causes, the most common of which is autoimmune adre nalitis. Autoimmune adrenalitis results from destruction of the adrenal cortex, which leads to deficiencies in glucocor ticoids, mineralocorticoids, and adrenal androgens. In the United States and Western Europe, the estimated prevalence of Addison disease is one in 20,000 persons; therefore, a high clinical suspicion is needed to avoid misdiagnosing a life-threatening adrenal crisis (i.e., shock, hypotension, and volume depletion). The clinical manifestations before an adrenal crisis are subtle and can include hyperpigmentation, fatigue, anorexia, orthostasis, nausea, muscle and joint pain, and salt craving. Cortisol levels decrease and adrenocorticotropic hormone levels increase. When clinically sus pected, patients should undergo a cosyntropin stimulation test to confirm the diagnosis. Treatment of primary adrenal insufficiency requires replacement of mineralocorticoids and glucocorticoids. During times of stress (e.g., illness, inva sive surgical procedures), stress-dose glucocorticoids are required because destruction of the adrenal glands prevents an adequate physiologic response. Management of primary adrenal insufficiency or autoimmune adrenalitis requires vigilance for concomitant autoimmune diseases; up to 50% of patients develop another autoimmune disorder during their lifetime. (Am Fam Physician. 2014;89(7):563-568. Copyright © 2014 American Academy of Family Physicians.) CME This clinical content conforms to AAFP criteria for continuing medical education (CME). See CME Quiz Questions on page 515. Author disclosure: No rel evant financial affiliations. ▲ Patient information: A handout on this topic is available at http:// familydoctor.org/ familydoctor/en/diseases- conditions/addisons- disease.html. Downloaded from the American Family Physician website at www.aafp.org/afp. Copyright © 2014 American Academy of Family Physicians. For the private, noncom mercial use of one individual user of the website. All other rights reserved. Contact copyrights@aafp.org for copyright questions and/or permission requests. Addison Disease 564 American Family Physician www.aafp.org/afp Volume 89, Number 7 ◆ April 1, 2014 Patients may experience fatigue, weakness, weight loss, and gastrointestinal upset9 (Table 210). Symptoms are gradual and worsen over a period of years, making early diagnosis difficult.10 The symptoms relate to the degree of cortisol, mineralocorticoid, and adrenal androgen deficiency at the …
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