Keratoderma climactericum is a skin condition characterized by hyperkeratosis of the palms and soles beginning at about the time of menopause. : 213

Causes
Keratoderma climactericum is either inherited through an abnormal gene, or it is acquired through a change in the health or environment of the individual. See also
Keratoderma
List of cutaneous conditions


== References ==
Diplopod limb buds first differ visibly from normal limb buds by their abnormally thick and long apical ectodermal ridges. Diplopodia usually delays the embryonic growth of cartilage, bone, and tendon by two days, particularly in the limbs. Other characteristics frequently seen in diplopodia mutants are shortened wings and legs, short upper beak, and smaller embryo size. Many embryos reach the final embryonic stage but then are unable to hatch, though, diplopod embryos can occasionally hatch and mature.Single diplopodia mutations produce wide ranges of phenotypes sharing these general characteristics and can even affect individual chickens left and right legs differently. The ranges of phenotypes produced by the different mutations also overlap broadly, so diplopodia mutations sometimes need to be distinguished by their phenotype distributions. Dr. Ursula Abbott has extensively studied the phenotypes and descriptions of the first four diplopodia mutations and has ranked them from least severe to most severe: dp-3, dp-1, dp-4, dp-2.Diplopodia-1
This autosomal mutation gives homozygotes duplicated wing tips and feet in front of the usual structures, as in the experimentally induced diplopodia described above. However, unlike the experimentally manipulated embryos, these embryos show no change in shh expression. The embryos express hoxd-11, hoxd-12, hoxd-13, Bmp-2, and Fgf-4 along the whole edge of each limb bud, even though these genes are normally only expressed at the posterior edge.Diplopodia-2
This is an autosomal trait that gives a very extreme diplopod phenotype, with up to eight toes on a foot. In some embryos, the two outer front toes on each foot are joined together.