Close
8th February 2024
A 21-year-old man was referred to the clinic with the following results after initially presenting to the GP with a long history of lethargy and intermittent muscle spasms.
A 21-year-old man was referred to the clinic with the following results after initially presenting to the GP with a long history of lethargy and intermittent muscle spasms.
| Investigation | Result | Normal value |
|---|---|---|
| Sodium | 130 mmol/l | 135-145 mmol/l |
| Potassium | 2.4 mmol/l | 3.5-5.0 mmol/l |
| Chloride | 90 mmol/l | 98-106 mmol/l |
| Magnesium | 0.39 mmol/l | 0.75-1.00 mmol/l |
| Urea | 6.2 mmol/l | 2.5-6.5 mmol/l |
| Creatinine | 80 micromol/l | 50-120 micromol/l |
| 24-hr urinary sodium | 260 mmol | 100-250 mmol |
| 24-hr urinary potassium | 158 mmol | 25-120 mmol |
Examination and blood pressure were normal.
What is the most likely diagnosis?
Complete Guide to Clinical Genetics ST3 Application and Recruitment (2027)
Written by Medibuddy. Last updated: October 2026. Clinical Genetics is
Clinical Genetics ST3
Complete Guide to Clinical Radiology ST3 Application and Recruitment (2027)
Recruitment paused: NHS England is not running Clinical Radiology ST3+ recru
Clinical Radiology ST3
Complete Guide to Paediatric Surgery ST3 Application and Recruitment in United Kingdom (2026)
Written by Medibuddy. Last updated: October 2026. If you’re planning
Paediatric Surgery ST3
Take your subscriptions with you
Our mobile app allows you to access your interview and exam question banks wherever you are.
