Large plaque parapsoriasis  are skin lesions that may be included in the modern scheme of cutaneous conditions described as parapsoriasis. These lesions, called plaques, may be irregularly round-shaped to oval and are 10 cm (4 in) or larger in diameter. They can be very thin plaques that are asymptomatic or mildly pruritic. Large-plaque parapsoriasis is a common associate of retiform parapsoriasis, can be accompanied by poikiloderma vasculare atrophicans, and can in rare occasions be a precursor to cutaneous T-cell lymphoma. Cause
Diagnosis
Treatment
Parapsoriasis treatment consists primarily of light therapy (more specifically PUVA therapy or UVB therapy) possibly in combination with topical steroids. Large plaque parapsoriasis is usually a chronic condition that needs long-term treatment. See also
List of cutaneous conditions
Mycosis fungoides

References


== External links ==
Diagnosis
Syringomas can often be diagnosed clinically based on presentation, distribution patterns over the body, lack of associated symptoms, and family history. A definitive diagnosis requires a skin biopsy to allow the tissue to be examined under a microscope. Histologically, syringomas have a characteristic comma-shaped ("tadpole") tail of dilated, cystic eccrine ducts. Treatment
The goal of treatment is to improve the appearance of lesions, since they are otherwise not serious and typically do not cause symptoms. Many treatment methods have been attempted, but complete removal is uncommon. No single treatment method has been shown to work consistently. Both medical and surgical treatments have been studied, each with variable success. Common destructive treatment methods include carbon dioxide lasers, dermabrasion, surgical excision, electrocoagulation, and chemical peels. Many of these methods are very time-consuming and require multiple treatment sessions. Carbon dioxide lasers are the most commonly practiced method; they can cause thermal damage, though, leading to scarring in the area. Medical therapies include topical atropine, topical retinoids, and oral tranilast. The most common adverse effects include redness, skin discoloration, and pain. Other side effects include blistering and scarring. See also
Acrospiroma
List of cutaneous conditions
List of cutaneous neoplasms associated with systemic syndromes

References
External links
eMedicine entry on syringomas
DermNet NZ