Question | Answer |
Hair development begins at what week gestation? | 14 |
Direction of hair shaft is determined by what week gestation? | 15-19 weeks |
Lanugo hair is present when? | 20 weeks gestation to birth |
Characteristics of mature hair | 1. Central core 2. Outer scales 3. Melanin |
Hair follicles over entire skin surface except: | 1. Palms/soles 2. Elbows/knees 3. Joints of fingers |
Landmarks and measurements | 1. Distributions (thick, thin?) 2. Whorls (Brain development. Single= normal) 3. Color (AS hypopigmented) 4. Eyebrows- position, curvature 5. Pubic/axillary hair |
Examination techniques | 1. Inspection of hairline 2. of distribution 3. of coloration 4. of unusual patches 5. of hair whorls 6. of hair loss 7. of texture (fragile, coarse, wiry) |
Pili torti | Menke's... copper transport issues |
TrichoRhinoPhalangeal syndrome | -Early onset -Arthritis - Joint problems -Wierd wiry, thin, currly hair Large foreheads! |
Minor anomalies of hair | 1. Low anterior hairline 2. Widow's peak (hypertelorism) 3. Male pattern baldness 4. Upswept posterior hairline 5. Supernumerary whorls |
Eyebrow minor anomalies | 1. Synophrys 2. Medial Flare 3. Thinning of lateral eyebrows |
Cornelia de Lange | 7q del... all eyebrow issues, long eyelashes, widow's peak |