- Klippel-Trènaunay-Weber Syndrome (KTW) Center
- Patient Comments: Klippel-Trenaunay-Weber Syndrome - Personal Experience
- Patient Comments: Klippel-Trenaunay-Weber Syndrome - Prognosis
- Patient Comments: Klippel-Tr�naunay-Weber syndrome - Symptoms
- What is Klippel-Trènaunay-Weber (KTW) syndrome?
- What is a port-wine stain?
- What is asymmetrical limb hypertrophy?
- Are there other abnormalities in Klippel-Trènaunay-Weber syndrome?
- How is intelligence affected?
- What is the basic defect in Klippel-Trènaunay-Weber syndrome?
- What causes Klippel-Trènaunay-Weber syndrome?
- What is the prognosis (outlook) with Klippel-Trènaunay-Weber syndrome?
- Why is it called Klippel-Trènaunay-Weber syndrome?
- Alternative names for Klippel-Trènaunay-Weber (KTW) syndrome
What is Klippel-Trènaunay-Weber (KTW) syndrome?
Klippel-Trènaunay-Weber (KTW) syndrome is a condition characterized by a triad of findings:
What is a port-wine stain?
A port-wine stain is a certain type of hemangioma. This capillary hemangioma has a recognizable appearance. It is usually a deep violet ("port-wine") colored lesion with fairly linear borders. These are most often found on the affected hypertrophied limb. They are generally flat or only slightly raised compared to the surrounding unaffected skin surface. The actual depth of the lesion is unpredictable and less commonly may even affect muscle and bone.
In addition to the port-wine stain, individuals with Klippel-Trènaunay-Weber also develop varicose veins. These often can be seen at birth as a large superficial vein extending from the lower leg all the way up to the buttocks. This vein has been referred to as the "Klippel-Trènaunay" vein and may not be obvious until later in childhood.
Occasionally affected individuals develop an arteriovenous fistula (abnormal connection between an artery and a vein). This is known as the Parkes-Weber variant of KTW. These patients usually have numerous fistulae that can result in heart failure if untreated.
What is asymmetrical limb hypertrophy?
Asymmetric limb hypertrophy is enlargement of one limb compared to the opposite side. For example, an individual with Klippel-Trènaunay-Weber syndrome may have a left leg or arm that is larger than his/her right leg or arm. This asymmetry is found in other inherited syndromes as well. Most commonly in individuals with Klippel-Trènaunay-Weber, the leg is involved more frequently than an arm; however, on occasion there is enlargement of two limbs, a buttock, or part of the trunk of the body.
Are there other abnormalities in Klippel-Trènaunay-Weber syndrome?
Although the triad of "port-wine stain, varicosities, and asymmetric limb hypertrophy," is the consistent clinical centerpiece of Klippel-Trènaunay-Weber, there are often other less frequent abnormalities found in those affected by the syndrome. These may include other limb or digit abnormalities such as:
- atrophy (a limb that is underdeveloped),
- fingers and toes that are disproportionately large or small,
- digits that are webbed (syndactyly),
- too many digits (polydactyly), or
- too few digits (oligodactyly).
In addition to limb abnormalities, there are some other common features, including:
- asymmetrical facial hypertrophy (one side of the face may be smaller than the other),
- macrocephaly (a large head), or
- microcephaly (a small head).
Eye problems may include glaucoma and cataracts. Any of the vascular anomalies can affect the internal organs including the intestinal and urinary tract systems. These may be at risk for spontaneous bleeding, and it is important to evaluate any individual with evidence of superficial abdominal lesions. Additionally, there is an increased risk of abnormal blood clots forming, which can move to the lungs, causing a pulmonary embolism.
How is intelligence affected?
Intelligence is usually not impaired in Klippel-Trènaunay-Weber. However, when there are hemangiomas on the face (facial hemangiomatosis), there may also be hemangiomas in the brain which can cause seizures (convulsions) or mental retardation. Fortunately, such problems are rare in Klippel-Trènaunay-Weber.
What is the basic defect in Klippel-Trènaunay-Weber syndrome?
It is not completely known, but some researches believe part of the defect is related to the control of angiogenic cells (precursors of blood vessels). Others believe it is caused by some injury to the developing embryo within the womb, resulting in venous compression and resultant abnormal venous pressures, causing varicosities and limb enlargement. In other words, we don't currently know the precise events that lead to the development of Klippel-Trènaunay-Weber.
What causes Klippel-Trènaunay-Weber syndrome?
Most cases of Klippel-Trènaunay-Weber are sporadic. They usually occur without warning, with no prior case in the family. However, there have been some cases that run in families.
What is the prognosis (outlook) with Klippel-Trènaunay-Weber syndrome?
Most persons with Klippel-Trènaunay-Weber have an enlarged leg and they do relatively well without any significant treatment. It can be helpful to wear compression stockings to prevent venous pooling in the affected extremity (varicose vein management). However, some Klippel-Trènaunay-Weber patients do have considerable pain. Skin ulcers, infections and other skin problems can occur, but usually the treatment is conservative. Surgery is almost never needed.
Why is it called Klippel-Trènaunay-Weber syndrome?
In 1900 the French physicians Maurice Klippel and Paul Trènaunay reported the case of a patient with a port-wine stain, asymmetrical overgrowth (hypertrophy) of soft tissue and bone together with hemangiomas of the skin In 1907, the eminent London physician F. Parkes Weber reported three more cases, and noted the varicosities. As is often the case in medicine, those who describe a syndrome are often given credit by having the syndrome named after them. Thus, in 1918 it became know as Klippel-Trènaunay-Weber syndrome.
Alternative names for Klippel-Trènaunay-Weber (KTW) syndrome
Alternative names for Klippel-Trènaunay-Weber (KTW) syndrome include angio-osteohypertrophy syndrome, congenital dysplastic angiectasia, elephantiasis congenita angiomatosa, hemangiectatic hypertrophy, Klippel-Trenaunay- Parkes-Weber syndrome (Parkes was Weber's middle name), Klippel Trenaunay syndrome, KTS, and osteohypertrophic nevus flammeus.
Health Solutions From Our Sponsors
"Pulmonary Thromboembolism Associated With Klippel-Trenaunay Syndrome." Pediatrics Vol. 116 No. 4 October 1, 2005 pp. e596 -e600.
Klippel-Trenaunay-Weber Syndrome - Personal Experience
Please describe your experience with Klippel-Trenaunay-Weber syndrome.Post View 12 Comments
Klippel-Trenaunay-Weber Syndrome - Prognosis
What is the prognosis for Klippel-Trenaunay-Weber syndrome in you or a relative? How do you manage your symptoms?Post View 2 Comments
Klippel-Tr�naunay-Weber syndrome - Symptoms
What symptoms do you experience from Klippel-Tr�naunay-Weber syndrome?Post View 1 Comment
Top Klippel-Trenaunay-Weber Syndrome Related Articles
Birth DefectsBirth defects have many causes and currently, are the leading cause of death for infants in the first year of life. Some of the causes of birth defects include genetic or chromosome problems. Exposure of the mother to rubella or German measles during pregnancy, or using drugs or alcohol during pregnancy. The treatment for birth defects depends upon the condition of the effected child.
Birthmarks and Other Skin Pigmentation ProblemsBirthmarks and other abnormal skin pigmentation is caused by the body's inability to produce enough melanin. Abnormal skin pigmentation can cause conditions such as vitiligo, pigmentation loss, melasma, albinism, port wine stains, macular stains and hemangioma.
Genetic DiseaseThe definition of a genetic disease is a disorder or condition caused by abnormalities in a person's genome. Some types of genetic inheritance include single inheritance, including cystic fibrosis, sickle cell anemia, Marfan syndrome, and hemochromatosis. Other types of genetic diseases include multifactorial inheritance. Still other types of genetic diseases include chromosome abnormalities (for example, Turner syndrome, and Klinefelter syndrome), and mitochondrial inheritance (for example, epilepsy and dementia).
GlaucomaGlaucoma is a common eye condition in which the fluid pressure inside the eye rises because of slowed fluid drainage from the eye. If untreated, glaucoma may damage the optic nerve and other parts of the eye, causing the loss of vision or even blindness.
Heart failure (congestive) is caused by many conditions including coronary artery disease, heart attack, cardiomyopathy, and conditions that overwork the heart. Symptoms of heart failure include
- congested lungs,
- fluid and water retention,
- fatigue and weakness, and
- rapid or irregular heartbeats.
There are two types of congestive heart failure, systolic or left-sided heart failure; and diastolic or right-sided heart failure. Treatment, prognosis, and life-expectancy for a person with congestive heart failure depends upon the stage of the disease.
Hemangioma Picture 1A birth irregularity where a localized tissue mass grows rich in small blood vessels. See a picture of Hemangioma and learn more about the health topic.
SeizureEpilepsy is a brain disorder in which the person has seizures. There are two kinds of seizures, focal and generalized. There are many causes of epilepsy. Treatment of epilepsy (seizures) depends upon the cause and type of seizures experienced.
Varicose VeinsVaricose vein: A dilated (widened) tortuous (twisting) vein, usually involving a superficial vein in the leg, often associated with incompetency of the valves in the vein. These visible and bulging veins are often associated with symptoms such as tired, heavy, or aching limbs. Spider veins are a group of widened veins that can be seen through the surface of the skin.