8D67

ICD-11 MMS 2026-01

Intracranial arachnoid cyst

Description

A fluid filled cavity within the arachnoid membrane which may be congenital or acquired. Acquired causes include trauma, infection and surgery. The most common site is the middle cranial fossa. Factors that influence whether the cyst causes symptoms include its size and location. Symptoms if present may include headache, dizziness, nausea and vomiting, seizures, developmental delay

Index terms

  • Intracranial arachnoid cyst
  • arachnoid brain cyst
  • arachnoid cerebral cyst
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  • arachnoid cyst
  • intracranium cyst NOS
  • Cerebellopontine cyst
  • cerebellopontine arachnoid cyst
  • Subarachnoid cyst

Exclusions from above levels

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

Sibling codes

  • 8D60 – Increased intracranial pressure
  • 8D61 – Intracranial hypotension
  • 8D62 – Cerebrospinal fluid rhinorrhoea
  • 8D63 – Cerebrospinal fluid otorrhoea
  • 8D64 – Hydrocephalus
  • 8D65 – Cerebrospinal fluid fistula
  • 8D66 – Syringomyelia or syringobulbia
  • 8D68 – Porencephalic cyst
  • 8D6Y – Other specified disorders of cerebrospinal fluid pressure or flow
  • 8D6Z – Disorders of cerebrospinal fluid pressure or flow, unspecified

Foundation entity

Intracranial arachnoid cyst – http://id.who.int/icd/entity/943887241

Part of: 08: Diseases of the nervous system