A family brings their 82-year-old grandmother to the emergency room stating that they cannot care for her anymore. They tell you, “She has just been getting sicker and sicker.” Now she stays in bed and won’t eat because of abdominal pain. She is too weak to go to the bathroom on her own. Her symptoms have been worsening over the past year, but she has refused to see a doctor. The patient denies symptoms of depression. Blood pressure is 90/54 with the patient supine; it drops to 76/40 when she stands. Heart and lungs are normal. Skin examination reveals a bronze coloring to the elbows and palmar creases. What laboratory abnormality would you expect to find in this patient?
A family brings their 82-year-old grandmother to the emergency room stating that they cannot care for her anymore. They tell you, “She has just been getting sicker and sicker.” Now she stays in bed and won’t eat because of abdominal pain. She is too weak to go to the bathroom on her own. Her symptoms have been worsening over the past year, but she has refused to see a doctor. The patient denies symptoms of depression. Blood pressure is 90/54 with the patient supine; it drops to 76/40 when she stands. Heart and lungs are normal. Skin examination reveals a bronze coloring to the elbows and palmar creases. What laboratory abnormality would you expect to find in this patient?
💡 Explanation
## **Core Concept**
The patient's presentation suggests a diagnosis of **Addison's disease**, a rare endocrine disorder characterized by the inadequate production of **cortisol** and/or **aldosterone** hormones by the **adrenal glands**. This condition can lead to various symptoms, including weakness, fatigue, abdominal pain, and changes in skin pigmentation.
## **Why the Correct Answer is Right**
The patient's symptoms, such as abdominal pain, weakness, and bronze-colored skin (particularly on the elbows and palmar creases), are classic for Addison's disease. The bronze discoloration, also known as **hyperpigmentation**, is due to the increased levels of **ACTH** (adrenocorticotropic hormone), which stimulates melanocortin receptors in the skin, leading to the characteristic bronze or tan skin color. The patient's orthostatic hypotension (a drop in blood pressure upon standing) is also consistent with adrenal insufficiency, as cortisol and aldosterone play crucial roles in maintaining vascular tone and fluid balance.
## **Why Each Wrong Option is Incorrect**
- **Option A:** This option would not directly explain the patient's symptoms of adrenal insufficiency and hyperpigmentation.
- **Option B:** While this could be seen in various conditions, it does not specifically relate to the clinical presentation suggestive of Addison's disease.
- **Option C:** This option might be seen in conditions affecting the liver or biliary system but does not align with the presentation of Addison's disease.
## **Clinical Pearl / High-Yield Fact**
A key clinical pearl in this case is the association between **Addison's disease** and **hyperpigmentation**, which is one of the few endocrine disorders that present with skin changes. Additionally, the presence of **orthostatic hypotension** is a critical finding that points towards adrenal insufficiency. Remember, the combination of weakness, abdominal pain, hyperpigmentation, and orthostatic hypotension is highly suggestive of Addison's disease.
## **Correct Answer:** D. Hyponatremia.
✓ Correct Answer: C. Low serum Na+
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