Mee's lines Transverse white line(s) in the nail plate that is non specific and
can be seen with any severe systemic insult. They grow out with the
nail plate. Often seen with arsenic ingestion.
meniscus of pus Pus within a bulla often having a crescentic shape.
micaceous scale Shiny, flat flakes resembling the mineral mica.
milia Tiny white cysts, usually less than 2 mm, containing keratin.
moniliform Resembling a string of beads.
morbilliform Generalized, small erythematous macules and/or small papules resembling
the rash of measles.
mottled Marked with spots of different colors.
Muehrcke lines Transverse white bands that are an abnormality
of the nail bed and do not grow out with the nail. Muehrcke lines
are commonly associated with hypoalbuminemia.
multilocular Multiple chambers separated by septae.
nail bed Epithelium and dermis beneath nail plate extending from the nail
matrix to the hyponychium.
nail folds The folds of skin that overlap the nail at its proximal and lateral
edges. The proximal nail folds consist of ventral and dorsal portions.
The ventral portion of the proximal fold adheres to the nail plate
and cannot be seen externally.
nail matrix The nail matrix is the specialized anatomical
unit beneath the posterior nail fold to the distal edge of the lunula
responsible for nail plate formation.
nail pitting Punctate depressions in the nail plate.
nail plate The hard, fully keratinized structure commonly
referred to as the nail.
nail unit An anatomic location or unit consisting
of the nail plate, nail bed, nail folds, and nail matrix.
Pertaining to the death of tissue in response to disease or injury.
A dermal or subcutaneous firm, well-defined lesion usually greater than .5 cm
click image to view animation
nuchal Pertaining to the nape of the neck.
nummular Round to oval shape usually less than 2-3
cm in diameter. Coin-shaped.