KnotesFree Orthopaedic & FRCS notes, viva stations and higher order SBAs
Topics · Must Know Facts · Foot & Ankle

Interdigital Neuroma

Must KnowFoot & AnklethinKbox SBA

Key points

  • “Degeneration and fibrotic changes in the common digital nerve near its bifurcation”

Causes

  • Anasthemosis m and l plantar nerve in 3rd webspace
  • High heel
  • Bursal hypertrophy
  • Tr metatarsal ligament

C/F

  • Plantar pain
  • Mulder click

Treat

  • Accomod footwear
  • MT bar
  • Excision
    • Dorsal
    • Plantar: in recurrence

Tarsal tunnel

Boundaries

  • MM
  • Calcaneum
  • Talus
  • Flexar retinaculum
  • Abd hallucis

Causes

  • Above MM
    • SOL
  • Below MM
    • Calcaneum #
    • Heel valgus

Related FRCS concepts

Morton’s NeuromaLesser-Toe Disorders and Morton's NeuromaPlantar FasciitisFreiberg’s InfractionBunionette Deformity

Written/reviewed by Kishore Puthezhath

Professor of Orthopaedics and Consultant Paediatric Orthopaedic Surgeon

FRCS (Tr & Orth) revision resource

Reviewed: September 2026