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Vascular anomalies in Proteus syndrome
P H Hoeger1, A Martinez, J Maerker
1Department of Paediatric Dermatology, Great Ormond Street Hospital for Children, London, UK. hoeger@uke.uni-hamburg.de
Clinical and Experimental Dermatology
|April 30, 2004
Summary
Vascular anomalies (VA) are a very common finding in Proteus syndrome (PS), affecting 100% of patients in one study. These anomalies, including vascular tumors and portwine stains, appear randomly distributed, supporting the somatic mosaicism theory in PS.
Area of Science:
- Genetics and Developmental Biology
- Dermatology
- Vascular Medicine
Background:
- Proteus syndrome (PS) is a rare hamartomatous disorder characterized by overgrowth, tumors, and various anomalies.
- Vascular anomalies (VA) are known to occur in PS, but their prevalence and characteristics remain incompletely understood.
Purpose of the Study:
- To determine the prevalence and types of vascular anomalies in patients with Proteus syndrome.
- To compare findings with previously reported cases and discuss their implications for understanding PS pathogenesis.
Main Methods:
- Clinical evaluation and review of medical records for 22 PS patients.
- Retrospective analysis of 100 previously reported PS cases (1983-2001).
- Diagnosis of VA confirmed by clinical assessment, imaging, and/or histology.
Main Results:
- All 22 patients in the current series (100%) exhibited VA, with multiple types present in 10 patients.
- Common VA included vascular tumors, portwine stains (PWS), and venous anomalies, occurring with similar frequency.
- Previously reported cases showed VA in 70% (70/100) of patients, with vascular hamartomas being most prevalent.
Conclusions:
- Vascular anomalies are a universal and highly variable finding in Proteus syndrome.
- The random distribution of VA, similar to other PS manifestations, supports the theory of somatic mosaicism.
- VA are a key diagnostic feature and important aspect of PS, requiring further characterization.