C77Secondary and unspecified malignant neoplasm of lymph nodes
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use C77 directly
Use the most specific code supported by the record.
- Chapter II
- Neoplasms
- Group C00-C97
- Malignant neoplasms U ác tính
- Official Vietnamese name
- U ác tính thứ phát và/hoặc không xác định ở hạch lympho
- Additional WHO coding guidance
- Excl.: malignant neoplasm of lymph nodes, specified as primary (C81-C86, C96.- )
Related C77 codes
C77.0
Primary diagnosis candidate
Lymph nodes of head, face and neck
C77.1
Primary diagnosis candidate
Intrathoracic lymph nodes
C77.2
Primary diagnosis candidate
Intra-abdominal lymph nodes
C77.3
Primary diagnosis candidate
Axillary and upper limb lymph nodes
C77.4
Primary diagnosis candidate
Inguinal and lower limb lymph nodes
C77.5
Primary diagnosis candidate
Intrapelvic lymph nodes
C77.8
Primary diagnosis candidate
Lymph nodes of multiple regions
C77.9
Primary diagnosis candidate
Lymph node, unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
