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Terry's nails half and half nails leukonychia nail signs clinical diagnosis
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Terry's nails half and half nails leukonychia fingernail clinical sign
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Terry's Nails
The image shows Terry's nails — a clinical nail sign characterized by:
- Proximal ~80% of the nail bed appears white/pale (ground-glass opacity)
- Narrow distal band (1–3 mm) of normal pink or red-brown color at the free edge
- The lunula is obliterated and not visible
- The nail surface is smooth with no pitting or onycholysis
Pathophysiology
The whitening results from:
- Edema and fibrosis of the nail bed connective tissue, which obscures the underlying vasculature
- Reduced vascularity of the nail bed (hypoalbuminemia causes decreased oncotic pressure → tissue edema)
- Telangiectatic vessels concentrated in the distal band produce the remaining pink/red coloration
Associated Conditions
| Condition | Mechanism |
|---|---|
| Liver cirrhosis (most classic) | Hypoalbuminemia, portal hypertension |
| Congestive heart failure | Reduced peripheral perfusion, edema |
| Type 2 diabetes mellitus | Microvascular disease |
| Chronic renal failure | Uremia, hypoalbuminemia |
| Malnutrition / hypoalbuminemia | Low oncotic pressure |
| Aging (>70 years) | Age-related nail bed changes |
Terry's Nails vs. Lindsay's (Half-and-Half) Nails
These two are the most important differentials:
| Feature | Terry's Nails | Lindsay's Nails |
|---|---|---|
| Proximal color | White (>80% of nail) | White (proximal 50%) |
| Distal band | Narrow pink/red (1–3 mm) | Broader brown/red band (~50%) |
| Lunula | Obliterated | May be visible |
| Classic association | Liver cirrhosis, CHF, diabetes | Chronic renal failure |
Clinical Workup Prompted
On identifying Terry's nails, the following investigations are warranted:
- LFTs + serum albumin (hepatic disease, hypoalbuminemia)
- Echocardiography / BNP (congestive heart failure)
- Fasting glucose / HbA1c (diabetes)
- Renal function panel (BUN, creatinine)
- Nutritional assessment
Terry's nails are a noninvasive, bedside biomarker of significant systemic disease and should prompt a thorough systemic evaluation.
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