Klippel–Trénaunay syndrome

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Klippel–Trénaunay Syndrome
Other names: KTS or KT

Klippel–Trénaunay syndrome, formerly Klippel–Trénaunay–Weber syndrome[1] and sometimes angioosteohypertrophy syndrome and hemangiectatic hypertrophy,[2] is a rare congenital medical condition in which blood vessels and/or lymph vessels fail to form properly. The three main features are nevus flammeus (port-wine stain), venous and lymphatic malformations, and soft-tissue hypertrophy of the affected limb.[2] It is similar to, though distinctly separate from, the less common Parkes Weber syndrome.

The classical triad of Klippel–Trenaunay syndrome consists of:[3]

  1. vascular malformations of the capillary, venous and lymphatic vessels;
  2. varicosities of unusual distribution, particularly the lateral venous anomaly; and
  3. unilateral soft and skeletal tissue hypertrophy, usually the lower extremity.

Signs and symptoms

Klippel–Trénaunay syndrome

The birth defect is diagnosed by the presence of a combination of these symptoms (often on approximately ​14 of the body, though some cases may present more or less affected tissue):[citation needed]

In some cases, port-wine stains (capillary port wine type) may be absent. Such cases are very rare and may be classified as "atypical Klippel–Trenaunay syndrome".[citation needed]

KTS can either affect blood vessels, lymph vessels, or both. The condition most commonly presents with a mixture of the two. Those with venous involvement experience increased pain and complications, such as venous ulceration in the lower extremities.[citation needed]

Those with large AVMs are at risk of formation of blood clots in the vascular lesion, which may migrate to the lungs (pulmonary embolism). If there is large-volume blood flow through the lesion, high-output heart failure may develop due to the inability of the heart to generate sufficient cardiac output.[4] Much rarer are haemorrhages. They can be serious if the brain is affected.[5]

Prevalence of symptoms in sufferers[6][full citation needed]
Symptom %
Port wine stain 98%
Longer extremity/hypertrophy 67%
Circumferential hypertrophy 77%
Varicosity 72%
Pain 37%
Bleeding 17%
Superficial thrombophlebitis 15%
Cellulitis 13%
Rectal bleeding 12%
Lymphatic malformation 11%
Lymphedema 10%
Hyperpigmentation 8%
Ankle ulcers 6%
Verrucae 6%
Hyperhidrosis 5%
DVT 4%
Induration 4%
Pulmonary embolism 4%
Limb numbness 2%


The birth defect affects men and women equally, and is not limited to any racial group. It is not certain if it is genetic in nature, although testing is ongoing.[7] There is some evidence that it may be associated with a translocation at t(8;14)(q22.3;q13).[8] Some researchers have suggested AGGF1 has an association.[9]


Differential diagnosis


There is disagreement as to how cases of KTS should be classified if there is an arteriovenous fistula present. Although several authorities have suggested that the term Parkes Weber syndrome is applied in those cases,[4][12][13] ICD-10 currently uses the term "Klippel–Trénaunay–Weber syndrome".


KTS is a complex syndrome, and no single treatment is applicable for everyone. Treatment is decided on a case-by-case basis with the individual's doctors.[citation needed]

At present, many of the symptoms may be treated, but there is no cure for Klippel–Trenaunay syndrome.[14]


Debulking has been the most common treatment for KTS for several decades and while improvements have been made, the procedure is still considered invasive and has several risks associated with it. More effective and less invasive treatment choices now exist for KTS patients and therefore debulking is generally only recommended as a last resort. Debulking operations can result in major deformities and also leave patients with permanent nerve damage.[citation needed]

Mayo Clinic has reported the largest experience in managing KTS with major surgery. In 39 years at Mayo clinic the surgery team evaluated 252 consecutive cases of KTS, of which only 145 (57.5%) could be treated by primary surgery.[15] The immediate success rate for treating varicose veins was only 40%, excision of vascular malformation was possible in 60%, debulking operations in 65%, and correction of bone deformity and limb length correction (epiphysiodesis) had 90% success. All the procedures demonstrated high recurrence rate in the follow-up. Mayo clinic studies demonstrate that primary surgical management of KTS has limitations and non-surgical approaches need to be developed in order to offer a better quality of life for these patients. Major surgery including amputation and debulking surgery does not seem to offer any benefit on a long-term basis.[citation needed]


Sclerotherapy is a treatment for specific veins and vascular malformations in the affected area. It involves the injection of a chemical into the abnormal veins to cause thickening and obstruction of the targeted vessels. Such treatment may allow normal blood flow to resume. It is a non-surgical medical procedure and is not nearly as invasive as debulking. Ultrasound guided foam sclerotherapy is the state of the art new treatment which could potentially close many large vascular malformations.[16][17]

Compression therapies are finding more use as of the last ten years. The greatest issue with KTS syndrome is that the blood flow and/or lymph flow may be impeded, and will pool in the affected area. This can cause pain, swelling, inflammations, and in some cases, even ulceration and infection. Among older children and adults, compression garments can be used to alleviate almost all of these, and when combined with elevation of the affected area and proper management, can result in a comfortable lifestyle for the patient without any surgery. Compression garments are also used lately after a debulking procedure to maintain the results of the procedure. For early treatment of infants and toddlers with KTS, custom compression garments are impractical because of the rate of growth. When children may benefit from compression therapies, wraps and lymphatic massage may be used. While compression garments or therapy are not appropriate for everyone, they are relatively cheap (compared to surgery), and have few side-effects. Possible side-effects include a slight risk that the fluids may simply be displaced to an undesirable location (e.g., the groin), or that the compression therapy itself further impedes circulation to the affected extremities.[citation needed]


The condition was first described by French physicians Maurice Klippel and Paul Trénaunay in 1900; they referred to it as naevus vasculosus osteohypertrophicus.[18][19] The German-British physician Frederick Parkes Weber described cases in 1907 and 1918 that were similar but not identical to those described by Klippel and Trénaunay.[20][21]


  1. "Klippel–Trenaunay syndrome". Archived from the original on July 4, 2013. Retrieved May 15, 2014.
  2. 2.0 2.1 James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology (10th ed.). Saunders. p. 585. ISBN 978-0-7216-2921-6.
  3. Karim, Tanweer; Nanda, NavdeepS; Singh, Upvan (2014). "A rare presentation of Klippel–Trenaunay syndrome". Indian Dermatology Online Journal. 5 (2): 154–6. doi:10.4103/2229-5178.131086. PMC 4030342. PMID 24860749.
  4. 4.0 4.1 Mendiratta, V; Koranne, RV; Sardana, K; Hemal, U; Solanki, RS (2004). "Klippel trenaunay Parkes-Weber syndrome". Indian Journal of Dermatology, Venereology and Leprology. 70 (2): 119–22. PMID 17642585.
  5. Petzold, A.; Bischoff, C.; Conrad, B. (2000). "Repetitive cerebral bleeding in an adult with Klippel–Trenaunay syndrome". Journal of Neurology. 247 (5): 389–391. doi:10.1007/s004150050609. PMID 10896274. S2CID 35454693. Archived from the original on 2019-08-13. Retrieved 2021-03-23.
  6. Klippel–Trenaunay syndrome: Spectrum and management
  7. Tian XL, Kadaba R, You SA, Liu M, Timur AA, Yang L, Chen Q, Szafranski P, Rao S, Wu L, Housman DE, DiCorleto PE, Driscoll DJ, Borrow J, Wang Q (2004). "Identification of an angiogenic factor that when mutated causes susceptibility to Klippel–Trenaunay syndrome" (PDF). Nature. 427 (6975): 640–5. Bibcode:2004Natur.427..640T. doi:10.1038/nature02320. PMC 1618873. PMID 14961121. Archived from the original (PDF) on December 9, 2006.
  8. Wang, Q.; Timur, A.A.; Szafranski, P.; Sadgephour, A.; Jurecic, V.; Cowell, J.; Baldini, A.; Driscoll, D.J. (2001). "Identification and molecular characterization of de novo translocation t(8;14)(q22.3;q13) associated with a vascular and tissue overgrowth syndrome". Cytogenetic and Genome Research. 95 (3–4): 183–8. doi:10.1159/000059343. PMC 1579861. PMID 12063397.
  9. Barker, K T; Foulkes, WD; Schwartz, CE; Labadie, C; Monsell, F; Houlston, RS; Harper, J (2005). "Is the E133K allele of VG5Q associated with Klippel–Trenaunay and other overgrowth syndromes?". Journal of Medical Genetics. 43 (7): 613–4. doi:10.1136/jmg.2006.040790. PMC 2564558. PMID 16443853.
  10. EL-Sobky TA, Elsayed SM, EL Mikkawy DME (2015). "Orthopaedic manifestations of Proteus syndrome in a child with literature update". Bone Rep. 3: 104–108. doi:10.1016/j.bonr.2015.09.004. PMC 5365241. PMID 28377973.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  11. Abdulhady, H; El-Sobky, TA; Elsayed, NS; Sakr, HM (11 June 2018). "Clinical and imaging features of pedal macrodystrophia lipomatosa in two children with differential diagnosis review". Journal of Musculoskeletal Surgery and Research. 2 (3): 130. doi:10.4103/jmsr.jmsr_8_18. S2CID 80970016.
  12. Lindenauer, S. Martin (1965). "The Klippel–Trenaunay Syndrome". Annals of Surgery. 162 (2): 303–14. doi:10.1097/00000658-196508000-00023. PMC 1476812. PMID 14327016.
  13. Cohen, M. Michael (2000). "Klippel–Trenaunay syndrome". American Journal of Medical Genetics. 93 (3): 171–5. doi:10.1002/1096-8628(20000731)93:3<171::AID-AJMG1>3.0.CO;2-K. PMID 10925375.
  14. Black, Rosemary (May 19, 2009). "What is Klippel–Trenaunay Syndrome? Brooklyn writer Carla Sosenko shares facts about condition". New York Daily News. Archived from the original on 2011-05-25. Retrieved 2021-03-23.
  15. Jacob, A G; Driscoll, D J; Shaughnessy, W J; Stanson, A W; Clay, R P; Gloviczki, P (1998). "Klippel–Trenaunay syndrome: Spectrum and management". Mayo Clinic Proceedings. 73 (1): 28–36. doi:10.4065/73.1.28. PMID 9443675.
  16. Cabrera, Juan; Cabrera Jr, J; Garcia-Olmedo, MA; Redondo, P (2003). "Treatment of Venous Malformations with Sclerosant in Microfoam Form". Archives of Dermatology. 139 (11): 1409–16. doi:10.1001/archderm.139.11.1409. PMID 14623700.
  17. McDonagh, B; Sorenson, S; Cohen, A; Eaton, T; Huntley, D E; La Baer, S; Campbell, K; Guptan, R C (2005). "Management of venous malformations in Klippel–Trenaunay syndrome with ultrasound-guided foam sclerotherapy". Phlebology. 20 (2): 63–81. doi:10.1258/0268355054069188. S2CID 71504108.
  18. synd/1812 at Who Named It?
  19. Klippel M, Trénaunay P (1900). "Du naevus variqueux ostéohypertrophique". Archives Générales de Médecine. 3: 641–72.
  20. Weber FP (1907). "Angioma-formation in connection with hypertrophy of limbs and hemi-hypertrophy". British Journal of Dermatology. 19: 231–5.
  21. Weber FP (1918). "Hemangiectatic hypertrophy of limbs – congenital phlebarteriectasis and so-called congenital varicose veins". British Journal of Children's Diseases. 25: 13.

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