Diseases of Hair + Nail

Question 1

What are the two types of hair follicles? Which gives rise to what hair?

Answer 1

• Terminal - thicker and larger hair
• Vellus - more fine and short hair

Question 1

What are four stages of hair growth?

Answer 1

• Anagen (growing - most of our hair on head)
• Catagen (Transition)
• Telegen (Resting)
• Exogen (shedding)

Question 2

What are three causes of “buckets” of hair loss?

Answer 2

• Disorders of hair cycling
• Inflammatory conditions (damage to hair follicles)
• Hair shaft abnormalities (inherited or acquired)

Question 3

What is the division of hair loss based on reversibility?

Answer 3

• Scarring alopecia (irreversible cessation of hair growth and permanent hair loss)
• nonscarring alopecia (not permanent, regrowth possible)
• structural hair disorders (chemicals, heat, can be reversible)

Question 4

What is a Hypertrichosis?

Answer 4

It is an excessive hair growth anywhere on the body - often where usually do not grow.

Question 5

What are the three types of alopecia?

Answer 5

• Androgenic/androgenetic Alopecia
• Traction Alopecia
• Alopecia Areata

Question 6

Which alopecia type is caused by autoimmune disease? How is hair lost in that case?

Answer 6

• Alopecia Areata

Question 7

Patient presents with hair loss on the entire head, including eyebrows.

Answer 7

• Alopecia Areata Totalis

Question 8

Patient presents with hair loss throughout the entire body.

Answer 8

• Alopecia Areata universalis

Question 9

Patient presents with a random patches of hair loss.

Answer 9

• Alopecia Areata (general no progression)

Question 10

How does one diagnose alopecia areata during a clinical visit?

Answer 10

Can be done by hair pull test. Grabbing about 60 hair. If more than 6 hair easily come out with a light tug - test is positive.