Medical ConditionsCraniofacial & dental genetics: Proteus syndrome
Medical ConditionsCraniofacial & dental genetics: Proteus syndrome
Proteus syndrome
Overview
Board takeaway: Plan around overgrowth, airway anatomy, lung disease, thrombosis, and positioning; oral treatment is individualized.
What causes Proteus syndrome?
A postzygotic activating AKT1 variant causes mosaic, progressive, disproportionate overgrowth. Only a subset of cells is affected; this is generally not an inherited familial disorder. Cerebriform connective-tissue nevi, asymmetric skeletal overgrowth, altered adipose tissue, and vascular malformations help characterize the phenotype.
Which systemic findings matter for dental care in Proteus syndrome?
Scoliosis, skeletal deformity, limited mobility, vascular malformations, pulmonary bullae or cystic disease, and increased deep-vein thrombosis or pulmonary embolism risk are important. Some patients have neurologic impairment or seizures. Severity and distribution vary markedly.
What oral findings are reported in Proteus syndrome?
Facial or jaw overgrowth, asymmetric alveolar development, unilateral macroglossia, midline deviation, and condylar abnormalities can occur. Impacted or ectopic teeth, altered tooth size or number, enamel defects, root distortion, gingival overgrowth, or exostoses are reported. Local-anesthetic landmarks and mouth opening may be abnormal.
How should dental treatment be adapted for Proteus syndrome?
- Anatomy: assess access, imaging needs, vascular lesions, and altered landmarks before injections or surgery.
- Airway and lungs: consult anesthesia or pulmonology for tissue overgrowth, vascular malformations, and pulmonary cysts. Nitrous oxide can expand closed gas spaces and may be unsuitable with relevant lung disease.
- Thrombosis and medication: review clot history and anticoagulants; the medical team directs perioperative thrombosis prevention.
- Positioning and prevention: accommodate deformities, remove traumatic factors, and support hygiene.
- Specialty care: orthodontic or surgical treatment follows achievable goals and individualized risk rather than a universal prohibition.
What determines treatment and prognosis in Proteus syndrome?
Multidisciplinary care addresses overgrowth, orthopedic needs, vascular and pulmonary complications, and function. Deep-vein thrombosis and pulmonary embolism are major threats. Prior orthopedic surgery alone does not establish a dental antibiotic-prophylaxis indication.