A unique case of a genu valgum deformity manifested in Hallermann–Streiff syndrome

Abstract

Hallermann–Streiff syndrome (HSS) is a relatively rare genetic disorder causing mainly dysmorphic craniofacial features. Very few cases are reported in the literature, none of which reported lower limb skeletal deformity. The main objective of this paper is to report a skeletal manifestation of HSS and the outcomes of its surgical treatment. A patient with HSS was evaluated, treated with corrective surgery, and followed up at the authors' hospital. The standard guidelines for genu valgum correction by guided growth method were applied on both limbs using an 8-plate system at the distal femurs. Subjective and objective satisfaction was achieved with the return of functional status. The surgical treatment was successful, and the patient went back to the potential functional level without significant impairment.

Keywords

• Genu valgum
• growth modulation surgery
• guided growth treatment
• Hallermann–Streiff syndrome
• hemiepiphysiodesis
• osteopetrosis
• skeletal dysplasia