Which of the following are common clinical features of Hyperosmolar Hyperglycemic State (HHS)?

• A. Weight gain
• B. Chest pain
• C. Cough
• D. Weakness, mental status change, dehydration, orthostasis, ± focal deficits and seizures

Answer: (D)

Hyperosmolar hyperglycemic state presents with severe hyperglycemia that drives osmotic diuresis, leading to profound dehydration and marked changes in mental status. In this state, patients are often older with type 2 diabetes and may show weakness and varying levels of confusion or agitation. The combination of dehydration with orthostatic symptoms and neurologic involvement—ranging from focal deficits to seizures—reflects the brain’s response to extreme serum osmolality and fluid shifts. Ketosis is minimal, so there isn’t the same acid-base picture as in diabetic ketoacidosis, and fruity breath is not typical.

That’s why the cluster of weakness, mental status change, dehydration with orthostatic signs, and possible focal neurologic deficits or seizures best captures the common clinical features of HHS. Weight gain is not typical, and chest symptoms like cough or chest pain aren’t characteristic features of the syndrome, making them less relevant to the classic presentation.