Congenital anterolateral tibial bowing and polydactyly: a case report

Abstract

Congenital anterolateral bowing of the tibia is a rare deformity that may lead to pseudarthrosis and risk of fracture. This is commonly associated with neurofibromatosis type 1. In this report, we describe a 15-month old male with congenital anterolateral bowing of the right tibia and associated hallux duplication. This is a distinct entity with a generally favourable prognosis that should not be confused with other conditions such as neurofibromatosis type 1. Previously published cases are reviewed.

Congenital anterolateral bowing of the tibia with ipsilateral polydactyly of the great toe associated with cerebral cyst: a new entity?

“…bowing of the tibia with ipsilateral polydactyly of the great toe (CABTP). Up to now, and including the present two patients, 21 cases have been described (Newell and Durbin, 1976;Adamsbaum et al, 1991;Watanabe et al, 1992;Weaver et al, 1996;Kitoh et al, 1997;Bressers and Castelein, 2001;Manner et al, 2005;Lemire, 2007;Evans et al, 2008). In none of them, additional major malformations were observed and all reported cases to date have been sporadic (Table 1).…”

Severe lateral tibial bowing with short stature in two siblings—A provisionally novel syndrome

“…One such condition is associated with duplications of structures in the feet including duplications of the hallux, tarsus, or metatarsus [Adamsbaum et al, 1991;Weaver et al, 1996;Lemire, 2007]. Hand abnormalities, such as syndactyly, preaxial polydactyly, and clinodactyly, have also been reported in this condition [Adamsbaum et al, 1991;Weaver et al, 1996;Lemire, 2007].…”

“…Environmental factors, such as abnormal intrauterine pressure; nutritional deficiencies, for example, vitamin D deficiency; Blount disease; fibrous dysplasia, and congenital syphilis, can also result in bowing of the lower extremities [Cheema et al, 2003]. Additionally, there have been several literature reports of tibial bowing of unknown etiology [Badgley et al, 1952;Beals and Fraser, 1976;Adamsbaum et al, 1991;Tuncay et al, 1994;Weaver et al, 1996;Currarino et al, 2003;Lemire, 2007].…”

Imaging features of lower limb malformations above the foot

“…Prognosis is better for patients who do not have concurrent neurofibromatosis type 1. Tibial bowing is associated with polydactyly [17], or preliminary mid-tibial duplication, bifid homolateral great toe and hand malformations in the context of a minor tibial duplication [18]; • congenital anteromedial bowing of the tibia also has a poorer clinical prognosis because it is often associated with fibular hemimelia (Fig. 16) (see below).…”