There are multiple definitions:

1. Basle Nomina Anatomica(Latin)

   • NA, TA
   • Anatomy, Terminology

2. borderline nuclear abnormality(English)

   • refers to cytological disease categories
   • CIN, CIN1, CIN2, CIN3, HC2, HPV, LBC, mRNA
   • Pathology, Cytometry / cytology
   • https://doi.org…met.2008.09.027