Q93.3Deletion of short arm of chromosome 4
Code usage status
Primary diagnosis
May be used as the primary diagnosis
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Complete code in the classification
Use when the diagnosis matches and no exclusion applies.
- Group Q90-Q99
- Chromosomal abnormalities, not elsewhere classified
- Official Vietnamese name
- Mất đoạn cánh ngắn nhiễm sắc thể số 4
- Additional WHO coding guidance
- Wolff-Hirschorn syndrome
Related Q93 codes
Q93
Monosomies and deletions from the autosomes, not elsewhere classified
Q93.0
Primary diagnosis candidate
Whole chromosome monosomy, meiotic nondisjunction
Q93.1
Primary diagnosis candidate
Whole chromosome monosomy, mosaicism (mitotic nondisjunction)
Q93.2
Primary diagnosis candidate
Chromosome replaced with ring or dicentric
Q93.4
Primary diagnosis candidate
Deletion of short arm of chromosome 5
Q93.5
Primary diagnosis candidate
Other deletions of part of a chromosome
Q93.6
Primary diagnosis candidate
Deletions seen only at prometaphase
Q93.7
Primary diagnosis candidate
Deletions with other complex rearrangements
Q93.8
Primary diagnosis candidate
Other deletions from the autosomes
Q93.9
Primary diagnosis candidate
Deletion from autosomes, 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.
