Congenital
Flexible
Physiologic (painless / painful)
Ligamentous laxity (DIAL HOME CS)
Rigid
CVT
Tarsal Coalition
Skewfoot
Acquired
Tendon
Tibialis posterior tendon dysfunction
Tight T achilles
Ligament
Rupture of spring ligament
Rupture of plantar fascia (including iatrogenic)
Bone
Fracture (talus / calcaneus / lis franc)
Tumour - OO/ABC/UBC
RA midfoot
OA hind/midfoot
Charcot (SADSLIPS)
Sinus Tarsi Syndrome
Neuromuscular
CP
Spinal dysraphism (SB)
Polio
MND
Compensatory
Genu valgum
Internal tibial torsion