Table 1.

Classification of trigger thumb in children according to Sujimoto.

Sugimoto Staging of Trigger Thumb
Stage I	Palpable Notta nodule +, no triggering/snapping
Stage II	Active triggering, seen on active IP joint extension
Stage III	Passive triggering, seen on passive IP joint extension, active IP joint extension not possible
Stage IV	Rigid type, no active or passive extension possible.