Hallermann–Streiff syndrome

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Hallermann–Streiff syndrome
Synonyms	Hallermann-Streiff-François syndrome, Oculomandibulofacial syndrome
Pronounce
Specialty	Medical genetics
Symptoms	Dwarfism, craniofacial dysmorphism, dental abnormalities, hypotrichosis, cataracts
Complications	N/A
Onset	Congenital
Duration	Lifelong
Types	N/A
Causes	Genetic mutation (unknown specific gene)
Risks
Diagnosis	Clinical diagnosis
Differential diagnosis	Progeria, Crouzon syndrome, Apert syndrome
Prevention	None
Treatment	Symptomatic treatment, surgical intervention
Medication
Prognosis	Variable, depends on severity of symptoms
Frequency	Rare, estimated <1 in 1,000,000
Deaths

Hallermann–Streiff syndrome (HSS) is a rare congenital disorder characterized by distinctive craniofacial abnormalities, dental anomalies, and proportionate dwarfism. The syndrome is named after the German ophthalmologist Wilhelm Hallermann and the Swiss ophthalmologist Enrico Streiff, who first described the condition in the 20th century.

Clinical Features

Individuals with Hallermann–Streiff syndrome typically present with a combination of the following features:

• Craniofacial dysmorphisms: These include a small head (microcephaly), a beaked nose, a small mouth, and a receding chin (micrognathia).
• Dental anomalies: These may include delayed eruption of teeth, missing teeth (hypodontia), and dental crowding.
• Proportionate dwarfism: Short stature with normal body proportions.
• Ocular abnormalities: These can include cataracts, microphthalmia (small eyes), and nystagmus.
• Skin and hair abnormalities: Thin skin and sparse hair, particularly on the scalp.
• Respiratory issues: Due to craniofacial abnormalities, individuals may experience breathing difficulties.

Diagnosis

The diagnosis of Hallermann–Streiff syndrome is primarily clinical, based on the characteristic physical features. Genetic testing may be used to rule out other conditions with overlapping symptoms.

Management

There is no cure for Hallermann–Streiff syndrome, and treatment is symptomatic and supportive. Management may involve a multidisciplinary team, including:

• Ophthalmology: For the management of cataracts and other eye abnormalities.
• Dentistry: For dental anomalies.
• Orthopedics: For skeletal issues.
• Respiratory therapy: For breathing difficulties.

Prognosis

The prognosis for individuals with Hallermann–Streiff syndrome varies depending on the severity of the symptoms and the presence of complications. With appropriate medical care, many individuals can lead relatively normal lives.

See also

• Craniofacial dysmorphisms
• Microcephaly
• Micrognathia
• Hypodontia
• Proportionate dwarfism
• Cataracts
• Microphthalmia
• Nystagmus

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