port-wine stain

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Related to port-wine stain: nevus flammeus, Port Wine Nevus


1. a substance used to impart color to tissues or cells, to facilitate microscopic study and identification.
2. an area of discoloration of the skin.
acid-fast stain a staining procedure for demonstrating acid-fast microorganisms.
differential stain one that facilitates differentiation of various elements in a specimen.
endogenous stain an intrinsic stain acquired during tooth development.
exogenous stain an intrinsic stain acquired after a tooth has erupted.
extrinsic stain a stain that can be removed from a tooth surface by polishing.
Giemsa stain a solution containing azure II-eosin, azure II-glycerin, and methanol; used for staining protozoan parasites such as Plasmodium and Trypanosoma, for Chlamydia, for differential staining of blood smears, and for viral inclusion bodies. Stained elements appear pink to purple to blue.
Gram stain a staining procedure in which bacteria are stained with crystal violet, treated with strong iodine solution, decolorized with ethanol or ethanol-acetone, and counterstained with a contrasting dye; those retaining the stain are called gram-positive, and those losing the stain but staining with the counterstain are called gram-negative.
hematoxylin and eosin stain a mixture of hematoxylin in distilled water and aqueous eosin solution, employed universally for routine examination of tissues.
intrinsic stain a stain that is within the enamel of a tooth and cannot be removed by polishing.
metachromatic stain one that produces in certain elements a color different from that of the stain itself.
nuclear stain one that selectively stains cell nuclei, generally a basic stain.
port-wine stain a persistent dark red to purple nevus flammeus that grows proportionately with the affected child and is usually found on the face. Initially it is macular, but the surface may develop angiomatous overgrowths with time. Port-wine stains often occur in association with other congenital abnormalities.
supravital stain a stain introduced in living tissue or cells that have been removed from the body.
tumor stain an area of increased density in a radiograph, due to collection of contrast material in distorted and abnormal vessels, prominent in the capillary and venous phases of arteriography, and presumed to indicate neoplasm.
vital stain a stain introduced into the living organism, and taken up selectively by various tissue or cellular elements.
Wright's stain a mixture of eosin and methylene blue, used for demonstrating blood cells and malarial parasites.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ne·vus flam·'me·us

, flame nevus
a large congenital vascular malformation nevus having a purplish color; it is usually found on the head and neck and persists throughout life.
See also: Sturge-Weber syndrome.
Synonym(s): port-wine stain
Farlex Partner Medical Dictionary © Farlex 2012
A common congenital neurovascular malformation, appearing as deep red-purple macular lesions, corresponding to cutaneous angioma(s), often located in the ophthalmic branch of the trigeminal nerve; when located on the meninges, port-wine nevi may be confined to the occipitoparietal pial vessels, where sluggish blood flow predisposes to hypoxia of underlying cortex; port-wine nevi may occur in the normal population—e.g., Mikhail Gorbachev—or be part of various syndromes—e.g., Klippel-Trenaunay, Beckwith-Wiedemann, Cobb, Rubenstein-Taybi, trisomy 13 syndromes
Management Flashlamp-pulsed tunable argon dye laser, most effective if administered < age 7. More treatment may be required for facial lesions
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

port-wine stain

A flat, permanent, purple-red birthmark caused by a benign tumour of small skin blood vessels. A capillary HAEMANGIOMA. Port-wine stains can be treated by skin grafting or with laser burns.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
Port-wine stains (PWSs) are congenital, slow-flow, capillary vascular malformations, characterized by normal epidermis overlying abnormal plexus of dilated dermal blood vessels.1 PWSs are present at birth, with incidence of 0.3% and do not disappear spontaneously.2 In newborn babies, the lesions typically appear as light red macules and tend to grow proportionally with age.
Sturge-weber syndrome in patients with facial port-wine stain. Pediatr Dermatol 2012;29:32-7.
When the protagonist asks her husband for the garbage can, he first thinks he perceives the hitherto absent port-wine stain on her cheek; subsequently he thinks it is jam--but then he cannot wipe it off (174).
Like the girl with the port-wine stain, she can invoke no state of personal normality to which she might be restored.
The photograph depicted an adult female applicant either (a) seated with no physical or facial disfigurement, (b) seated with a visible port-wine stain, (c) seated in a wheelchair with no facial disfigurement, or (d) seated in a wheelchair with a visible port-wine stain.
The most common types of vascular birthmarks are macular stains, hemangiomas, and port-wine stains. There are also many rare types of vascular birthmarks.
"These children need not be scarred by the psychological impact of these lesions anymore," says Tan, who notes that children with port-wine stain often are shunned by other children.
Epidemiology: A port-wine stain is a cutaneous capillary malformation that occurs in approximately 3 of every 1000 newborns and usually involves the head and neck regions.
Most children with port-wine stain show no other symptoms.
After 1 year of treatment, about 89% of patients were cleared of their port-wine stain. The best response rates were seen in infants in whom the lesion covered less than 20% of the face, which had a 91% clearance rate, and in lesions in the V1 dermatome, which had a 94% clearance rate.
For a resource list of hemangioma and port-wine stain specialists in your area, log onto The Vascular Birthmarks Foundation at www.birthmark.org.