Chapter 91 :: Nail Disorders Flashcards
red nails
Erythronychia
may be a sign of phenytoin and alcohol fetopathy and is a constant feature of congenital onychodysplasia of Iso-Kikuchi
Micronychia
it never reaches into the free margin of the nail plate
SUBUNGUAL HEMATOMA
exaggeration of nail bed and matrix hyperkeratosis
Onychogryposis
bridging of the nail pocket by connective tissue, in most cases scar
Pterygium
A temporary slowdown or even arrest of nail formation results in a transverse groove that runs parallel to the lunula border
BEAU LINES
result of a longer-lasting arrest of nail matrix proliferation that eventually results in a proximal gap in the nail and proximal onycholysis
ONYCHOMADESIS
most frequent sign of nail psoriasis
Pits
Multiple longitudinal fissures, often associated with nail thinning and ridges Multiple longitudinal fissures, often associated with nail thinning and ridges
onychorrhexis
analogous to the Auspitz phenomenon on the skin and result from damage to the dilated capillaries in the nail bed causing the blood to clot in these longitudinally arranged small vessels
Splinter hemorrhages
represent psoriatic plaques in the distal matrix and the nail bed
Salmon spots
When more than 50% of the nail is affected or the infection reaches the matrix at any point in onychomycosis
systemic treatment is indicated
Dermatophytes respond best to
terbinafine (Lamisil) 250 mg daily
sausage-like lesions with a keratotic tip.
Most arise from under the proximal nailfold and remain lying on it causing a longitudinal groove
Ungual Fibrokeratoma
occur in the proximal nailfold of the fingers, rarely on toes, where they exert pressure on the underlying matrix, resulting in a regular longitudinal groove
Myxoid Pseudocysts
