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Cripes !!......Thank Ewe karen......
can be an indication of either a cutaneous or a systemic disorder.
Re: Meaning of Fingernail MoonsMatrix. The matrix is a highly specialized epithelialstructure that manufactures the bulk of the nail plate. Itgrows and matures like other epithelial structures andproduces a highly dense and compacted stratum corneumcalled the nail plate. The flat, oval shaped, matrix extendsfrom under the proximal nail fold to just beyond theproximal portion of the visible part of the nail plate. Alittle more than one-third of the matrix is seen through thenail plate as the white half-moon shaped lunula. Theepithelium of the proximal nail fold and the proximalportion of the matrix under the nail fold makes the topportion of the nail plate. The distal matrix (lunula) makesthe bottom of the nail plate that is bonded to the nail bed,it is a lighter color as it mixes with the matrix cells.The lunula The lunula is the visible portion of the distal nail matrix that extends beyond the proximal nailfold.It is white, half-moon-shaped, appears by week 14 of gestation, has unique histologic features.The lunula has a primary structural role in defining the free edge of the distal nail plate. Lunular anomalies include changes in form and structure and in color. Lunular dysmorphologic features can be characterized by macrolunula, microlunula or anolunula, and nonconvex lunula. Lunulardyschromias can be confluent or spotted or can be characterized by longitudinal colored bands that traverse the lunula. Alterations in the morphologic features or color (or both) of the lunula can be an indication of either a cutaneous or a systemic disorder.SOURCE: http://www.madsci.org/posts/archives/jun2000/959991296.An.r.html
Here's another little fingernail question.Some of my nails are smooth on the upper surface while on others I've got lots of "ridges" running the length of the nail. These are especially pronounced on the nails of my index fingers. What causes that? And what are the white spots?(OK, I know that's 2 questions... so sue me! [!] )