Positioning the Dermatoscope at the Nailfold
Probe placed at the cuticle to view capillary loops directly.
- ×200: Typical magnification (video capillaroscope)
- 8: Fingers examined (excluding thumbs, standard protocol)
- ~10 min: Exam duration (per patient, all digits)
- Yes: Immersion oil use (improves optical clarity)
Why the nailfold is examined
Capillaries here run parallel to the skin, easy to view directly.
Who gets screened
Raynaud's patients are screened to catch scleroderma early.
The Healthy Nailfold Capillary Architecture
Loops are regular, evenly spaced, uniform hairpin shape.
- 9–14 /mm: Normal density (loops along nailfold row)
- 0: Giant loops expected (in a healthy pattern)
- <20 µm: Loop diameter (apical limb width)
- Regular: Row arrangement (parallel, evenly spaced)
Normal hairpin morphology
Each loop shows a thin afferent and efferent limb, smooth turn.
Baseline for comparison
This pattern is the reference used to flag abnormal findings.
Early Scleroderma — First Capillary Changes
A handful of loops dilate; density starts to drop slightly.
- 1–3: Giant capillaries (per mm, scattered)
- Mild ↓: Density change (still near-normal count)
- Rare: Hemorrhages (occasional microbleed)
- Mostly preserved: Architecture (slight irregularity)
First sign: giant loops
Isolated enlarged capillaries are the earliest detectable clue.
Clinical relevance
Early pattern can precede overt disease by months to years.
Active Scleroderma — Frequent Giants and Hemorrhage
Many giant loops, visible hemorrhages, moderate capillary loss.
- 4–8: Giant capillaries (per mm, frequent)
- Common: Hemorrhages (multiple per field)
- Moderate ↓: Density change (noticeable loop dropout)
- Disrupted: Architecture (irregular spacing)
Active-stage hallmark
Frequent giants plus hemorrhages define the active pattern.
Monitoring implications
This pattern often prompts closer systemic monitoring.
Late Scleroderma — Avascular Fields and Neoangiogenesis
Severe capillary loss, disorganized bushy regrowth vessels.
- Extensive: Avascular fields (large loop-free zones)
- Severe ↓: Density change (<2 loops/mm typical)
- Present: Bushy / ramified loops (neoangiogenesis)
- Fully disorganized: Architecture (loss of parallel rows)
Loss and regrowth together
Avascular zones sit beside chaotic new bushy vessels.
End-stage significance
Late pattern correlates with more advanced organ involvement.
Placeholder: late pattern is the strongest capillaroscopic risk marker.