Autosomal dominant transmitted disorder with
strabismus and hemifacial hyperplasia.
Hemifacial Hyperplasia with Strabismus.
Only a few cases have been
described in the world literature, and the true incidence is unknown.
Autosomal dominant inheritance is suspected.
Hemifacial hyperplasia involves the facial bones
and facial soft tissue. Growth of the neurocranium is unaffected. The
eyeball of the affected side is of normal size, but two of the three
generations in the first described family had ipsilateral, uncorrectable
amblyopia and/or convergent or alternating strabismus. Dentition was
accelerated on the affected side. In the opinion of Bencze et al.,
hemifacial hyperplasia and eye features were genetically connected. In a
second family that was described later, the phenotypic spectrum was expanded
to include submucous cleft palate. Intelligence in this latter family
reportedly was normal.
Although hemifacial hyperplasia is mild
in many cases, involvement of the tongue, tonsils, and neck has been
described in some cases. Severe respiratory distress can develop, similar to
infants with extensive cystic hygroma. Therefore, a thorough clinical
assessment of the upper airway is mandatory prior to anesthesia.
Other syndromes of hemifacial
hyperplasia with or without bone involvement have been reported worldwide,
first by Beck in 1836. However, these cases did not include eye features. In
addition, syndromes of hemihypertrophy involving other body parts, such as
Klippel-Trénaunay syndrome, are well known.
Bencze J, Schnitzler A, Walawska J: Dominant inheritance of hemifacial
hyperplasia associated with strabismus. Oral Surg Oral Med Oral Pathol
Sculerati N, Jacobs JB: Congenital facial hemihypertrophy: A report of a
case with airway compromise. Head Neck Surg