ICD-11 classes
02 Neoplasms
Malignant neoplasms, except primary neoplasms of lymphoid,...
Malignant neoplasms, stated or presumed to be primary, of...
Malignant mesenchymal neoplasms
2B5A — Synovial sarcoma, primary site

ICD-11 2B5A — Synovial sarcoma, primary site

A malignant neoplasm characterised by the chromosomal translocation t(X; 18)(p11; q11). It can occur at any age, but mainly affects young adults, more commonly males. Although any site can be affected, the vast majority of the cases arise in the deep soft tissues of extremities, especially around the knee. Microscopically, synovial sarcoma is classified as monophasic (with a spindle or epithelial cell component) or biphasic (with both spindle and epithelial cell components). Synovial sarcomas can recur or metastasize to the lungs, bones, and lymph nodes.

The diagnosis includes nothing.

The diagnosis excludes nothing.

Diagnosis with code 2B5A contains 4 clarifying diagnoses:

  1. 2B5A.0 — Synovial sarcoma of soft tissues of limb
  2. 2B5A.1 — Synovial sarcoma of respiratory or intra-thoracic organs
  3. 2B5A.Y — Synovial sarcoma, other specified primary site
  4. 2B5A.Z — Synovial sarcoma, unspecified primary site

The diagnosis is coded elsewhere:

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