Author: Vanessa Ngan, Staff Writer, 2006.
Proteus syndrome is also known as elattoproteus syndrome and elephant man disease. The syndrome became widely recognised after the release of the movie “The Elephant Man”, a screenplay depicting the life of Joseph Merrick who was thought to have neurofibromatosis, but is now believed to actually have had severe Proteus syndrome.
A German paediatrician named the syndrome in 1983 after the Greek god Proteus, who had the ability to change his body into different shapes.
Proteus syndrome is an extremely rare genetic disorder that is characterised by the abnormal growth of bones and blood vessels, and various skin lesions including lipomas, epidermal naevi and café au lait macules. The condition is usually not evident until late infancy or early childhood when signs and symptoms start to appear. Overgrowth of different body parts is progressive with time.
The disease occurs sporadically and rarely arises in siblings or other family members.
The gene involved was identified in 2011, AKT1. The mosaic alteration or mutation in the AKT1gene leading to this syndrome is thought to occur soon after conception. The abnormal gene is present in some cells, where it makes a abnormal protein that increases cell proliferation. Unaffected cells behave normally.
Every patient described with Proteus syndrome presents slightly differently, but the features described below occur in many of them.
Abnormal bone and soft tissue development
Abnormal skin and connective tissue development
Common facial features include:
Internal organs affected include the spleen and thymus, which can become enlarged. The condition also causes quite significant physical disfigurement and learning disabilities or developmental delays. Affected individual's are prone to blood clots (thrombosis, embolus).
There is no specific treatment for Proteus syndrome. The condition should be managed by identifying early any serious medical problems and providing prophylactic and symptomatic treatment. A multidisciplinary team of doctors is required to manage Proteus syndrome. This should include and orthopaedist, craniofacial surgeon, plastic surgeon, dermatologist, dentist, neurosurgeon, geneticist, and psychologist.
Management of skin abnormalities may include:
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