Light microscopic morphological appearances in 322 hair samples submitted during a 15 year period (1989–2004)
| Morphological abnormality | N | % | Clinical syndrome |
|---|---|---|---|
| N/A, not available. | |||
| Isolated Trichorrhexis nodosa | 18 | 5.6 | Non-specific |
| Trichorrhexis invaginata | 23 | 7.1 | Nertherton |
| Pili torti | 21 | 6.5 | Menkes |
| “Tiger tail” | 8 | 2.5 | Trichothiodystrophy |
| Pili canaliculati et trianguli | 10 | 3.1 | Uncombable hair |
| Pigment clumping | 9 | 2.8 | Chediak-Hagashi |
| Hypopigmentation | Griscelli | ||
| Monilethrix | 1 | 0.3 | Monilethrix |
| Absent outer root sheath andwrinkled stocking effect | 9 | 2.8 | Loose anagen |
| Abnormal not diagnostic | 60 | 18.6 | Non-specific |
| No pathological abnormality | 161 | 50 | None |
| Inadequate | 2 | 0.6 | N/A |