Norman
Allan | ||||
| home alternative medicine herbs science ask the doctor biography blog | ||||
Some
horizontal ridge phenomena include: | ||
| ||
| Mees'
lines or Aldrich-Mees' lines are horizontal lines of discoloration which occur
on the nails of the fingers and toes after an episode of poisoning | ||
(I wouldn't swear to this - I think this may happen after minor injury?) | ||
| koilonychia
("spoon nails") not exactly a horizontal ridge, this "depression",
but needs to be distinguished. . | ||
Nails
may exhibit many different abnormalities. In
the condition known as koilonychia ("spoon nails"), the nails are
flattened and have concavities. This condition may be associated with iron deficiency
(but it can simply be a normal variant).. | ||
| ||
A group of oncologists describe how a patient on chemotherapy developed fingernail anomalies."Two months into his second-line chemotherapy, he developed multiple, concomitant, transverse and longitudinal black lines in all of his fingernails and toenails. After an interval of 3 months, he presented a complex pattern of nail hyperpigmentation, from combined dense horizontal and longitudinal streaks in some nails to diffuse black discoloration in others (Figure). Other associated changes included koilonychia, dystrophy, and friability of nail plates." The point here is that these doctors had no idea why these disfigurations were occurring. Skinmed. 2007 Mar-Apr;6(2):95-6. "A complex pattern of melanonychia and onycholysis after treatment with pemetrexed for lung cancer." Dasanu CA, Wiernik PH, Vaillant J, Alexandrescu DT. | ||