FB50.2

ICD-11 MMS 2026-01

Synovial cyst of popliteal space

Description

This is a benign swelling of the semimembranous or more rarely some other synovial bursa found behind the knee joint.

Index terms

  • Synovial cyst of popliteal space
  • Baker cyst
  • Baker cyst of knee
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  • popliteal cyst
  • synovial Baker cyst
  • synovial cyst of knee

Excludes

  • FB41.0 – Spontaneous rupture of popliteal cyst

Exclusions from above levels

  • FB54.2 – Tibial collateral bursitis
  • 01 – Certain infectious or parasitic diseases
  • 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
  • DA0E.8 – Temporomandibular joint disorders

Sibling codes

  • FB50.0 – Infectious bursitis
  • FB50.1 – Bursitis related to use, overuse or pressure
  • FB50.3 – Calcium deposit in bursa
  • FB50.Y – Other specified bursitis
  • FB50.Z – Bursitis, unspecified

Foundation entity

Synovial cyst of popliteal space – http://id.who.int/icd/entity/435131151

Allowed postcoordination axes

Part of: FB50: Bursitis › 15: Diseases of the musculoskeletal system or connective tissue