Keratoderma blennorrhagica

Blennorrhea

Blennorrhea is mucous discharge, especially from the urethra or vagina .Blennorrhagia is an excess of such discharge, often specifically referring to that seen in gonorrhea. In fact, blennorrhagia is also a German name of Gonorrhea that was previously in use, but now no longer in technical use....

(or keratoderma blennorrhagicum) are skin lesions commonly found on the palms

Hand

A hand is a prehensile, multi-fingered extremity located at the end of an arm or forelimb of primates such as humans, chimpanzees, monkeys, and lemurs...

 and soles

Sole (foot)

The sole is the bottom of the foot.In humans the sole of the foot is anatomically referred to as the plantar aspect. The equivalent surface in ungulates is the hoof.- Human sole :...

 but which may spread to the scrotum

Scrotum

In some male mammals the scrotum is a dual-chambered protuberance of skin and muscle containing the testicles and divided by a septum. It is an extension of the perineum, and is located between the penis and anus. In humans and some other mammals, the base of the scrotum becomes covered with curly...

, scalp

Scalp

The scalp is the anatomical area bordered by the face anteriorly and the neck to the sides and posteriorly.-Layers:It is usually described as having five layers, which can conveniently be remembered as a mnemonic:...

 and trunk

Torso

Trunk or torso is an anatomical term for the central part of the many animal bodies from which extend the neck and limbs. The trunk includes the thorax and abdomen.-Major organs:...

 also, and which resemble psoriasis

Psoriasis

Psoriasis is an autoimmune disease that appears on the skin. It occurs when the immune system mistakes the skin cells as a pathogen, and sends out faulty signals that speed up the growth cycle of skin cells. Psoriasis is not contagious. However, psoriasis has been linked to an increased risk of...

.

Keratoderma blennorrhagica is commonly seen as an additional feature of reactive arthritis (Reiter's syndrome)

Reactive arthritis

Reactive arthritis , is classified as an autoimmune condition that develops in response to an infection in another part of the body. Coming into contact with bacteria and developing an infection can trigger the disease. Reiter's syndrome has symptoms similar to various other conditions collectively...

in almost 15% of male patients. The appearance is usually of a vesico-pustular waxy lesion with a yellow brown colour. These lesions may join together to form larger crusty plaques with desquamating edges.