A 25-yr old man comes with features of chronic renal failure. He also gives a h/o an uncle who died of renal failure 10 years ago. Ocular examination by slit-lamp reveals keratoconus. What is the most probable diagnosis?
## **Core Concept**
The question involves a case with features of chronic renal failure and a family history of renal failure. The additional finding of keratoconus on ocular examination suggests a systemic condition that affects both the kidneys and the eyes. This combination of findings points towards a hereditary or genetic condition.
## **Why the Correct Answer is Right**
The correct answer, **Alport syndrome**, is a genetic disorder characterized by glomerulonephritis, end-stage kidney disease, and hearing loss. It often presents with ocular abnormalities, most commonly anterior lenticonus and keratoconus. The syndrome is inherited in an X-linked pattern, which explains the family history provided (the uncle's condition could be related through the maternal lineage). The presence of keratoconus, a condition where the cornea thins and bulges, in conjunction with chronic renal failure and a positive family history, strongly supports the diagnosis of Alport syndrome.
## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not provided, but typically, incorrect options might include other causes of renal failure without the specific ocular findings or family history.
- **Option B:** Similarly, without the specific details of option B, it's hard to directly refute it, but conditions like diabetic nephropathy or hypertensive nephrosclerosis wouldn't typically present with keratoconus or a strong familial component in this pattern.
- **Option C:** Again, lacking specifics, but other genetic conditions might not combine renal failure with these specific ocular findings as characteristically as Alport syndrome.
- **Option D:** Without details, but presumably, this would be another condition that doesn't fit as well with the combination of findings presented.
## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that Alport syndrome is a classic cause of hereditary nephritis and is often associated with sensorineural hearing loss and eye abnormalities, particularly anterior lenticonus and keratoconus. The X-linked inheritance pattern means males are more frequently and severely affected than females, which could explain the presentation in this young man and the history of his uncle.
## **Correct Answer:** . **Alport syndrome**