# A nurse is assessing a 58-year-old male client who presents to the emergency department with complaints of severe fatigue, muscle weakness, and recent weight loss. Which assessment finding would be most indicative of adrenal insufficiency (Addison's disease)? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=177172 > language: ko > subject: Adult Health ## 문제 A nurse is assessing a 58-year-old male client who presents to the emergency department with complaints of severe fatigue, muscle weakness, and recent weight loss. Which assessment finding would be most indicative of adrenal insufficiency (Addison's disease)? ## 보기 1. Blood pressure of 160/95 mmHg with peripheral edema 2. Fasting blood glucose level of 180 mg/dL with polyuria 3. Heart rate of 120 bpm with palpitations and tremors 4. Bronze-colored hyperpigmentation of the skin and mucous membranes **✔ 정답** **정답: 4** ## 해설 Bronze-colored hyperpigmentation is the most characteristic and pathognomonic sign of primary adrenal insufficiency (Addison's disease), caused by elevated ACTH levels stimulating melanocyte activity. Primary adrenal insufficiency (Addison's disease) occurs when the adrenal cortex fails to produce sufficient cortisol and aldosterone. This condition triggers a compensatory mechanism in the anterior pituitary gland, increasing the production of adrenocorticotropic hormone (ACTH) in an attempt to stimulate the underfunctioning adrenal glands. The most characteristic and pathognomonic sign of primary adrenal insufficiency is bronze-colored hyperpigmentation of the skin and mucous membranes. This occurs because ACTH shares structural similarities with melanocyte-stimulating hormone (MSH). Chronically elevated ACTH levels cross-react with melanocyte receptors, leading to increased melanin production and a characteristic bronze or dark skin color, particularly in sun-exposed areas, skin folds, scars, and mucous membranes. This hyperpigmentation is specific to primary adrenal insufficiency and helps distinguish it from secondary adrenal insufficiency, where ACTH levels are low. Nurses' recognition of this finding is crucial, as it indicates a serious endocrine emergency requiring immediate medical intervention. Other symptoms such as fatigue, weakness, and weight loss are common but nonspecific. When hyperpigmentation is combined with the patient's primary symptoms, it creates a clinical picture strongly suggestive of Addison's disease, which can progress to life-threatening adrenal crisis if left untreated. ## 심화 해설 Understanding the Pathophysiology The clinical presentation of fatigue, muscle weakness, and weight loss in a 58-year-old male should immediately raise suspicion for primary adrenal insufficiency (Addison's disease). This condition arises from the destruction of the adrenal cortex, most commonly due to autoimmune adrenalitis or, in endemic regions, infections such as tuberculosis [1]. The resulting deficiency in glucocorticoids (cortisol) and mineralocorticoids (aldosterone) leads to a cascade of metabolic and hemodynamic disturbances. The most specific physical finding for primary adrenal insufficiency is hyperpigmentation. When cortisol levels fall, the negative feedback loop to the pituitary gland is lost. This causes a marked compensatory increase in the secretion of pro-opiomelanocortin (POMC), a precursor protein that is cleaved into adrenocorticotropic hormone (ACTH) and melanocyte-stimulating hormone (MSH). Elevated MSH binds to melanocortin-1 receptors on melanocytes, stimulating melanin production and resulting in a characteristic bronze-colored pigmentation [2][3]. This pigmentation is typically diffuse and most prominent in sun-exposed areas, pressure points (elbows, knees), palmar creases, and mucous membranes (buccal mucosa, gums) [3][4]. Analyzing the Answer Choices To identify the correct answer, it is essential to differentiate the clinical hallmarks of Addison's disease from those of other endocrine and cardiovascular disorders. - **Option 1 (Incorrect):** A blood pressure of 160/95 mmHg with peripheral edema suggests hypertension and fluid volume overload. This is the opposite of the clinical picture in Addison's disease, where aldosterone deficiency leads to sodium and water loss, resulting in hypotension and volume depletion [1][4]. Cushing's syndrome (glucocorticoid excess) would be a more fitting association for this finding. - **Option 2 (Incorrect):** A fasting blood glucose of 180 mg/dL with polyuria is indicative of hyperglycemia and diabetes mellitus. Cortisol is a counter-regulatory hormone that increases blood glucose; therefore, a deficiency of cortisol in Addison's disease typically predisposes patients to hypoglycemia, not hyperglycemia. - **Option 3 (Incorrect):** A heart rate of 120 bpm with palpitations and tremors points toward a hyperadrenergic state, such as hyperthyroidism or a pheochromocytoma. While patients with Addison's disease can develop compensatory sinus tachycardia secondary to severe volume depletion and hypotension, the presence of tremors is not a typical manifestation of adrenal insufficiency. - **Option 4 (Correct):** Bronze-colored hyperpigmentation of the skin and mucous membranes is the classic, pathognomonic sign of primary Addison's disease. This finding is a direct consequence of chronically elevated ACTH and MSH levels. Notably, hyperpigmentation often precedes other systemic symptoms by months or even years, making it a critical early diagnostic clue that can prevent a life-threatening adrenal crisis [3]. Clinical Application and NCLEX Insight For the NCLEX-RN, it is vital to recognize that hyperpigmentation is the key distinguishing feature between primary adrenal insufficiency (Addison's disease) and secondary adrenal insufficiency (caused by pituitary failure with low ACTH). In secondary insufficiency, the skin does not darken because ACTH and MSH levels are not elevated. Furthermore, while symptoms like fatigue and weight loss are nonspecific, their combination with hyperpigmentation and signs of volume depletion (hypotension, hyponatremia, hyperkalemia) forms a high-yield clinical triad for Addison's disease. The case report literature consistently emphasizes that recognizing this cutaneous manifestation can lead to early diagnosis and management, avoiding the severe cardiovascular collapse of an adrenal crisis [1][2][4]. References (research sources) - [1]Primary Adrenal Tuberculosis Causing Addison's Disease: A Rare Case Report and A brief Update on Diagnosis and Treatment.Case reportDinkar A, Singh J, Tejan N, Patel ML, Patwa AK, Atam I. (2025) · DOI: 10.2174/0118715265391446250916054124 - [2]Successful Therapeutic Approach to Facial Hyperpigmentation Secondary to Addison's Disease: A Case Report and Literature Review.Case reportColorado Franco LA, Villamizar M, Caceres CL, González Ardila C, Holguín Molina AJ. (2026) · DOI: 10.7759/cureus.107884 - [3]Addisonian Pigmentation - The Great Mimicker - A Review.Research articleVerma D, Sarkar R, Mendiratta V, Srivastava A. (2024) · DOI: 10.4103/ijd.ijd_234_23 - [4]A DESCRIPTION OF ADDISON'S DISEASE, AND ITS NEUROPSYCHIATRIC MANIFESTATIONS COMPARING THE DISEASE AS IT IS NOW TO THE DISEASE AS EXPERIENCED BY SAINT ELIZABETH OF THE TRINITY IN 1906.Research articleAgius M, Agius M. (2025) ## 임상 시나리오 Recognizing Hyperpigmentation in Addison's DiseaseDifferentiating primary adrenal insufficiency from other endocrine disorders The most specific physical sign of primary adrenal insufficiency is bronze-colored hyperpigmentation. This occurs due to loss of cortisol negative feedback, causing a compensatory rise in POMC-derived ACTH and MSH. Assess for pigmentation in sun-exposed areas, pressure points (elbows, knees), palmar creases, and buccal mucosa. This finding is absent in secondary adrenal insufficiency (pituitary cause). CautionDo not confuse with the hypertension and hyperglycemia of Cushing's syndrome or the tachycardia of hyperthyroidism. Adrenal crisis presents with hypotension, not hypertension. ## 핵심 개념 - **Addison's disease** — Primary adrenal insufficiency caused by destruction of the adrenal cortex, leading to deficient cortisol and aldosterone production. - **Pro-opiomelanocortin (POMC)** — A precursor protein cleaved into ACTH and MSH; levels rise with loss of cortisol negative feedback in primary adrenal insufficiency. - **Melanocyte-stimulating hormone (MSH)** — A hormone derived from POMC that stimulates melanocytes to produce melanin, causing hyperpigmentation. - **Adrenocorticotropic hormone (ACTH)** — A pituitary hormone that stimulates the adrenal cortex; markedly elevated in primary adrenal insufficiency due to lack of cortisol feedback. ## 같은 주제 문제 - [A nurse is assessing a client for suspected primary adrenal insufficiency (Addison's disea…](https://mymerci.kr/pages/nclex_q.php?qn_id=177171) - [A nurse is assessing a 39-year-old client who presents to the emergency department with co…](https://mymerci.kr/pages/nclex_q.php?qn_id=177173) - [A nurse is assessing a patient with suspected Addison's disease. 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