| NRI | nerve root involvement; nerve root irritation; nonrespiratory infection |
|---|---|
| AFTN | autonomously functioning thyroid nodule |
| HAN | heroin-associated nephropathy; hyperplastic alveolar nodule |
| LN | Lesch-Nyhan [syndrome]; lipoid nephrosis; Lisch nodule; low necrosis; lupus nephritis; lymph node |
| NIV | nodule-inducing virus |