Boyd Classification for Congenital Pseudoarthrosis of Tibia

Mnemonic: BBCCDDE

CPT classification

Boyd’s classification

I – Bowing

II – Constriction (hourlgass)

III – Cyst

IV – Dense (Sclerotic)

V – Dysplastic fibula

VI – “En-” neurofibroma or schwannoma (intraosseous)


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