pterygium unguis; pterygium of nail; dorsal pterygium

Etiology

• lichen planus

Pathology

• scar tissue between the proximal nailfold & nail matrix

Clinical manifestations

• proximal nail fold skin grows out with skin of nail bed, resulting in triangular formation known as pterygium

More general terms

• nail disease
• abnormal morphologic structure (malformation)

Additional terms

• pterygium (web eye)