There are multiple definitions:

1. polyarteritis nodosa(English)

   • a systemic vasculitis characterized by necrotizing inflammatory lesions that affect medium-sized and small muscular arteries, preferentially at vessel bifurcations. These lesions result in microaneurysm formation, aneurysmal rupture with hemorrhage, thrombosis, and, consequently, organ ischemia or infarction
   • CPAN, ANCA
   • Vascular disease
   • https://www.ncb…ooks/NBK482157/

2. phthalic anhydride(English)

   • EPA

3. polyomavirus-associated nephropathy(English)

   • one of the most common viral complications in renal transplant recipients and is an increasingly recognized cause of renal transplant dysfunction and graft loss; also denoted as PVAN
   • BKV, PVAN
   • Nephrology, Transplantation
   • https://doi.org…3099(03)00770-9

4. Pediatric and Adolescent Nutrition(English)

   • IDA, IFA, WHO
   • Nutrition, Pediatrics
   • https://pubmed.…h.gov/36263494/

5. periodic alternating nystagmus(English)

   • OKAN, PRN
   • Ophthalmology
   • https://doi.org…88382-0/50058-X

6. panobinostat(English)

   • a histone deacetylase inhibitor mediating apoptosis in PC3 and PC3-AR cells was associated with increased levels of double strand DNA breaks, indicated by p-ɣH2AX
   • AR, ATM, HDACi, PCa, PI3K
   • Oncology, Apoptosis, Prostate
   • https://doi.org…oncotarget.1314