Myelodysplastic syndrome w isolated del(5q) chromsoml abnlt

This code represents a specific subtype of myelodysplastic syndrome (MDS) characterized by a unique genetic abnormality: a deletion on the long arm of chromosome 5 (del(5q)). Patients typically present with refractory anemia and often have a favorable prognosis compared to other MDS subtypes.

Use this code when documentation explicitly states a diagnosis of myelodysplastic syndrome with the isolated del(5q) chromosomal abnormality. This diagnosis is typically confirmed by cytogenetic analysis. It is crucial to ensure the deletion is isolated and not accompanied by other significant chromosomal abnormalities.

• Confirm cytogenetic testing results explicitly state "isolated del(5q)" to differentiate from other MDS subtypes with del(5q) in combination with other abnormalities.
• Do not use this code if other chromosomal abnormalities are present, even if del(5q) is also noted; a more specific MDS code would be required.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, such as for treatment or monitoring of the MDS.