The likelihood that a test or procedure will provide the information needed to establish a diagnosis.
The diagnostic yield of needle evaluation is more than 95%. It can be as high as 98%.
When one does a needle evaluation, one gets the following information:
- Whether the mass is solid or cystic or complex
- Whether pus is obtained or not
- If the mass is solid, whether it is gritty or not
- If the mass is solid, the characteristics of the aspirate obtained, whether suggestive of malignancy or not.
- The biopsy result
The post-needle evaluation diagnosis should be correlated with the biopsy result and the clinical diagnosis.