AB91

ICD-11 MMS 2026-01

Mucosal cyst of postmastoidectomy cavity

Index terms

  • Mucosal cyst of postmastoidectomy cavity

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 02 – Neoplasms
  • 05 – Endocrine, nutritional or metabolic diseases
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  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • AB90 – Recurrent cholesteatoma of postmastoidectomy cavity
  • AB92 – Granulation of postmastoidectomy cavity
  • AB93 – Chronic inflammation of postmastoidectomy cavity

Foundation entity

Mucosal cyst of postmastoidectomy cavity – http://id.who.int/icd/entity/593239689

Allowed postcoordination axes

Part of: 10: Diseases of the ear or mastoid process