ORPHA:90308
Capillary-lymphatic-venous malformation with segmental distribution
Also known as: CLVM with segmental distribution · KTS · Klippel-Trénaunay syndrome
Publications
2,137
Trials
1
Interventional, condition-specific
Researchers
1,041
Distinct authors in sample
Gene link
—
Readiness
2/6
Stages with a signal
Clinical definition (Orphanet)
A rare complex vascular syndrome characterized by capillary malformations manifesting as wine stains and venous varicosities typically prominent along the lateral aspect of the lower extremities, associated with overgrowth of a limb (most commonly a leg, less frequently other regions of the body), involving bone and/or soft tissues. The diagnosis is usually made in presence of at least two of these three features. Lymphatic malformations are also observed, while arteriovenous fistulas are absent. Patients present recurrent painful thrombophlebitis, venous thrombosis, and sudden venous hemorrhage.
How rare: <1 / 1 000 000 — fewer than one in a million. In a city the size of Kolkata, that might mean on the order of fifteen people.
Research stages
Trial readiness signals
Where this condition sits on an open-data research pipeline — not how close a treatment is, and not medical advice. Empty stages often mean “not in these databases under this Mondo ID,” not “impossible.”
2/6 stages with a signal
An interventional trial matched this condition name on ClinicalTrials.gov — see trials below.
- Gene identifiedNot found
No GenCC disease–gene assertion in this build
- LiteraturePresent
2,137 matched papers (1,107 in last 10 years) Source
- Phenotype characterisedNot checked
Not yet enriched from Monarch / HPO
- Animal modelNot checked
Not yet enriched from Monarch / Alliance
- Orphan designationNot checked
FDA/EMA orphan-drug designation not enriched yet
- Interventional trialPresent
1 matched on ClinicalTrials.gov
Biology
Genes and phenotypes
Gene–disease validity from GenCC, plus phenotypes and animal models joined from Monarch Initiative via Mondo ID — not a clinical diagnosis aid.
Do we know what causes it?
Not yet — the cause hasn't been pinned down in GenCC.
No strong gene–disease assertion joined for this Orphanet entity.
Phenotypes (Monarch / HPO)
Not enriched in this build — Monarch phenotype joins were not run for this record.
Animal models (Monarch / Alliance)
Not enriched in this build.
Literature
Is anyone studying this?
2,137
2,137 papers have been published on this condition. That is a real research literature — still far smaller than common diseases (breast cancer: over 700,000 papers). Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=5449) is 41.
2,137 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 41 (publications denominator n=5449).
1,107 in the last 10 years · low confidence
Phrase hits: 2,137 · MeSH hits: 0
Who's working on it?
1,041
Distinct author names in 200 sampled papers — named people below.
Who's working on it?
People publishing on this condition (sampled Europe PMC records). Affiliation is the most recent found in that sample.
- 01Guo Z4 papers · 2026
Department of Pediatric Surgery & Vascular Anomalies, Xi'an International Medical Center Hospital, 710100, Xi'an, China. guozhengtuan@hotmail.com.
Papers in Europe PMC - 02Ishikawa K4 papers · 2026
Department of Plastic and Reconstructive Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
Papers in Europe PMC - 03Kato M4 papers · 2026
Department of Pediatric Surgery, Keio University School of Medicine, Tokyo, Japan.
Papers in Europe PMC - 04Lin W4 papers · 2026
Department of Pediatric Surgery & Vascular Anomalies, Xi'an International Medical Center Hospital, 710100, Xi'an, China.
Papers in Europe PMC - 05Nomura T4 papers · 2026
Department of Plastic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Papers in Europe PMC - 06Wang H4 papers · 2026
Department of Pediatric Surgery & Vascular Anomalies, Xi'an International Medical Center Hospital, 710100, Xi'an, China.
Papers in Europe PMC - 07Xie C4 papers · 2026
Department of Pediatric Surgery & Vascular Anomalies, Xi'an International Medical Center Hospital, 710100, Xi'an, China.
Papers in Europe PMC - 08Yang W4 papers · 2026
Department of Pediatric Surgery & Vascular Anomalies, Xi'an International Medical Center Hospital, 710100, Xi'an, China.
Papers in Europe PMC - 09Yang X4 papers · 2026
Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China.
Papers in Europe PMC - 10Akita S3 papers · 2026
Department of Plastic Surgery, Tamaki Aozora Hospital, Tokushima, Japan. akitasnagasaki@gmail.com.
Papers in Europe PMC
Clinical research
Is a treatment being tested?
1
interventional trials for this specific condition
1 interventional trial matched this specific condition name; none in our sample are currently recruiting.
Data as of 27 July 2026
1 interventional trial — more than 73% of diseases in the trials denominator have none at all (5114 of 7003; this disease is at the 76.8th percentile).
low confidence · 76.8th percentile (trials denominator)
Recruiting interventional trials
From the matched ClinicalTrials.gov set
1 interventional trials matched after quoted-phrase search and title/condition post-filter.
No currently recruiting studies in the matched set. Open the same search on ClinicalTrials.gov.
Where to find support
We do not yet link condition-specific patient organisations. These umbrella groups support undiagnosed and ultra-rare families:
India — NPRD
Last verified 2026-07-26This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.
Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.
How we counted this
Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored on the overview but are not added to the query string.
"Capillary-lymphatic-venous malformation with segmental distribution" OR "CLVM with segmental distribution" OR "Klippel-Trénaunay syndrome"
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Capillary-lymphatic-venous malformation with segmental distribution" OR "CLVM with segmental distribution" OR "Klippel-Trénaunay syndrome"
Interventional trials matched via: phrase (mesh = registered under a MeSH descriptor no name phrase would catch; recall-expansion = gene / selected parent terms used only for trials).
Study-type breakdown: 1 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.
Query health: ok — strategies attempted: phrase; with hits: phrase
Run this search on ClinicalTrials.gov
Synonyms dropped by stoplist: KTS
Confidence reasoning
- Preferred label is multi-word and distinctive
- 1 synonym(s) dropped by stoplist (may under-count)
- No label/synonym collisions with other diseases in this corpus
- Publication count (2137) is implausibly high for prevalence class "<1 / 1 000 000" — treat as possible over-matching, not a measure of research intensity
Ingested 2026-07-27T03:44:08.209Z