Pseudoprogeria syndrome

Pseudoprogeria syndrome, also known as Hallermann-Streiff syndrome (HSS) or Hallermann-Streiff-François syndrome, is a rare congenital disorder characterized by a distinctive combination of craniofacial, ocular, dermatological, and skeletal abnormalities that give affected individuals a prematurely aged (progeroid) appearance. The condition is sometimes also referred to as oculomandibulodyscephaly or dyscephalia mandibulo-oculofacialis. Key clinical features include a characteristic bird-like facial appearance (brachycephaly with frontal bossing, a thin pointed nose, and micrognathia or small jaw), bilateral congenital cataracts, microphthalmia (small eyes), dental anomalies (such as natal teeth, supernumerary teeth, or hypodontia), proportionate short stature, and hypotrichosis (sparse hair), particularly of the scalp, eyebrows, and eyelashes. Skin atrophy, especially over the nose and scalp, contributes to the aged appearance. Additional features may include upper airway obstruction related to the mandibular hypoplasia, which can cause significant respiratory difficulties, particularly in infancy. Intellectual development is typically normal, though some patients may have mild intellectual disability. There is no specific cure or targeted therapy for pseudoprogeria syndrome. Management is multidisciplinary and symptomatic, focusing on ophthalmologic care (including early cataract surgery), dental management, monitoring and treatment of airway obstruction (which may require tracheostomy in severe cases), and orthopedic surveillance. Nutritional support may be needed in infancy due to feeding difficulties associated with the small jaw. Genetic counseling is recommended for affected families, though the exact genetic basis remains incompletely understood in most cases.

Common questions about Pseudoprogeria syndrome