Flashcards in Hair & Nails Deck (75)
Half and half nails
Chronic renal disease (also called Lindsay's nails)
Proximal 1/2 with white zone, distal 1/2 with red brown zone
Nail finding in kidney disease
Half and half nails (Lindsay's nails), proximal 1/2 with white zone, distal 1/2 with red brown zone
Proximal 1/2 with white zone, distal 1/2 with red/brown zone
1/2 and 1/2 nails (Lindsay's nails) - found in renal disease
Beaded appearance of hair due to periodic thinning of hair shaft (like necklace with string of beads)
Normal at birth, develops in a few months with short fragile brittle hair
Large uneven bubbles in hair due to trauma
Two paint brushes against each other (incomplete fracture with frayed ends), seen in which diseases?
*Seen in Nethertons, Menkes disease, TTD, arginosuccinic aciduria
Name the hair finding found in Nethertons, Menkes, TTD, and arginosuccinase deficiency?
Trichorrhexis Nodosa found in what disease(s)?
Alternating light and dark bands under polarizing light
Trichothiodistrophy (due to sulfur deficiency), found in TTD duh
Twisting and flattening of the hair fiber
Pili torti found in what disorders
Bjornstad, Crandall Syndrome, Menkes, Netherton
Clean transverse fracture of hair shaft, mechanical or aquired
What disease is trichoscisis found in?
Name the hair findings in Trichothiodystrophy
Name the hair findings in Menkes
Pili torti (most common)
Short brittle "steel wool" hair
Cupid's bow upper lip
Progressive CNS deterioration
Menkes Disease, due to defect in copper transporter
Pili trianguli et canaliculi
Uncombable Hair syndrome
Spun glass hair
Uncombable hair syndrome
Triangular cross-section with central linear groove along one side
Pili trianguli et canaliculi (seen in uncombable hair syndrome)
Spun glass hair (Pili trianguli et canaliculi) is due to premature keratinization of what part of the hair follicle?
Inner root sheath
Which part of the hair is derived from the mesoderm?
The infundibulum of the hair extends from the surface of the epidermis Down to which structure?
Opening of sebaceous gland
The isthmus extends from the opening of the sebaceous gland Down to what structure?
Insertion of arrector pili muscle (bulge)
Where is the bulge located in the hair follicle?
At the junction of the isthmus and the inferior segment. It is where the arrector pili muscle inserts
The outer root sheath occurs where in the hair follicle?
EVERYWHERE! It's just that going up during the isthmus it will undergo trichilemmal differentiation, and then in the infundibulum is essentially keratinized like the rest of the epidermis
The inner root sheath is found in what part of the hair follicle?
Starts in the dermal papilla but disintegrates by the time it reaches the bulge which is in the isthmus
Which portion of the hair follicle is the inner root sheath never present?
How long is anagen phase for each hair?