| Patients No. (%) | |
| Hair feature | 112 (100) |
| Brittle hair or hair shaft abnormality | 108 (96) |
| Brittle hair | 98 (88) |
| Hair shaft abnormality | 76 (68) |
| Tiger tail | 82 (73) |
| Decreased sulfur or cystine | 79 (71) |
| Sparse hair | 54 (48) |
| Alopecia | 44 (39) |
| Hair loss with fever or infection | 8 (7) |
| Dry hair | 24 (21) |
| Fine hair | 16 (14) |
| Slow growing hair | 8 (7) |
| Long hair | 5 (4) |
| Nail feature | 70 (63) |
| Onychodystrophy* | 41 (37) |
| Brittle nails | 16 (14) |
| Hypoplasia | 15 (13) |
| Koilonychia | 13 (12) |
| Splitting (onychoschizia); peeling | 8 (7) |
| Ridging | 7 (6) |
| Other† | 3 (3) |
| Normal nails; not reported | 14 (13); 28 (25) |
| Total | 112 (100) |
*We collated reports of dysplasia, dystrophic nails, thickening and yellow discoloration as onychodystrophy.
†Slow growing nails (2 patients) and soft nails (1).