Tuberous Sclerosis Complex Associated with Vascular Anomalies or Overgrowth
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Updated: Mar 17, 2026

A Patient-Derived Xenograft Model for Venous Malformation
Published on: June 15, 2020
David Jenkins1, Catherine McCuaig2, Beth A Drolet3
1Dermatology Department, John Hunter Hospital, New Lambton, New South Wales, Australia. dwtjenkins@gmail.com.
Background:
Dysregulation of the mammalian target of rapamycin pathway is the underlying pathogenic mechanism in tuberous sclerosis complex (TSC). Other syndromes caused by genetic alterations in this pathway frequently manifest as vascular anomalies or asymmetric overgrowth. Rarely, these features have been documented in TSC.
Objective:
To collate cases of TSC with vascular anomaly or overgrowth that have been published and to assemble additional recent cases, as this finding has been underreported.
Methods:
TSC cases from three pediatric dermatology referral centers on two continents were reviewed to identify individuals noted to have hemihypertrophy or vascular anomalies.
Results:
We report five additional cases of TSC associated with vascular anomalies or overgrowth that contribute to our understanding of some of the pathways and treatments involved in vascular anomalies.
Conclusion:
Hemihypertrophy and vascular anomalies may be more frequent in the setting of TSC than previously appreciated. A common pathogenetic mechanism may tie these manifestations together.
Insights
Vascular anomalies and overgrowth are more common in tuberous sclerosis complex (TSC) than previously thought. Further research is needed to understand the shared pathways and treatments for these conditions.
Area of Science:
- Genetics
- Dermatology
- Pathophysiology
Background:
- Tuberous sclerosis complex (TSC) is characterized by mTOR pathway dysregulation.
- Genetic alterations in this pathway can cause vascular anomalies and overgrowth.
- These features are rarely documented in TSC.
Purpose of the Study:
- To review published TSC cases with vascular anomalies or overgrowth.
- To report additional recent cases of TSC with these manifestations.
- To address the underreporting of these findings.
Main Methods:
- Review of TSC cases from three pediatric dermatology centers.
- Identification of individuals with hemihypertrophy or vascular anomalies.
- Analysis of contributing pathways and treatments.
Main Results:
- Five new cases of TSC associated with vascular anomalies or overgrowth were identified.
- These cases enhance understanding of related pathways and treatments.
- The findings suggest a potential link between TSC and these conditions.
Conclusions:
- Hemihypertrophy and vascular anomalies may occur more frequently in TSC.
- A common pathogenetic mechanism might link these TSC manifestations.
- Further investigation into the prevalence and mechanisms is warranted.
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