Extreme hypokalemia in an asymptomatic 40-year-old cachectic male

Hypokalemia is a relatively common electrolyte disturbance that, despite its frequency, can pose a serious threat when it occurs in patients with end-stage chronic illnesses. In many individuals, mild to moderate reductions in serum potassium may be surprisingly well tolerated over time; however, severe depletion remains a potentially life-threatening condition that demands rapid recognition and intervention. In this report, we describe an exceptional case of extreme hypokalemia < 2 mmol/L in a patient living with human immunodeficiency virus (HIV) infection, who also suffered from persistent chronic diarrhea and marked unintentional weight loss, yet exhibited few of the classical clinical signs usually associated with profound potassium deficiency. We outline the urgent procedures carried out by the laboratory under emergency conditions, examine the complex pathophysiological mechanisms, ranging from gastrointestinal potassium losses to altered renal handling, responsible for this critical imbalance, and detail the specific treatment regimen administered. By presenting these elements in concert, we aim to offer clinicians a clearer understanding of both the diagnostic approach and the therapeutic strategies necessary to manage similar high-risk patients effectively.