Webster's New World Medical Dictionary

keratodermia blennorrhagicum
A skin dis-
ease that occurs in patients with reactive arthritis
(formerly Reiter’s syndrome). Abbreviated KB.
Classically, the areas of the skin that are involved are
the palms of the hands and the soles of the feet,
although other body surfaces may also be affected.
The inflammation of the skin can come and go.
When the inflammation is present, it appears as
patches of reddish, raised pustules that can be
painful and tender. These patchy areas may group
together and peel periodically. KB can be treated
with topical medications, including skin softeners
(emollients) and medications that clear off the peel-
ing, dry skin (keratolytic medications). Sometimes
these treatments are used along with vitamin D
creams, such as calcipotriene. Emotional stress and
certain medications may aggravate the condition.
keratoplasty
Corneal transplant.
keratosis
A localized horny overgrowth of the
skin, such as a wart or callus. Among the common
types of keratosis are actinic keratosis and sebor-
rheic keratosis. 
keratosis, actinic
A small rough spot on the
skin that can give rise to a skin cancer called squa-
mous cell carcinoma. Actinic keratosis is due to
excessive sun exposure and most frequently occurs
in fair-skinned people after 40 years of age.
Common locations for actinic keratosis are the face,
scalp, nape of the neck, upper chest, forearms, and
backs of the hands. Prevention involves minimizing
sun exposure and using sunscreen. Treatments
include cryosurgery (freezing), surgical removal,
topical medications, laser therapy, and photody-
namic therapy (injection into the bloodstream of a
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chemical that collects in the actinic keratoses to
make them more sensitive to exposure to a special-
ized form of light). Also known as senile keratosis
and solar keratosis.