Renal papilla

Renal papilla
Kidney, with renal papilla labeled at upper right.
1. Renal pyramid 2. Interlobular artery 3. Renal artery 4. Renal vein 5. Renal hilum 6. Renal pelvis 7. Ureter 8. Minor calyx 9. Renal capsule 10. Inferior renal capsule 11. Superior renal capsule 12. Interlobar vein 13. Nephron 14. Renal sinus 15. Major calyx 16. Renal papilla 17. Renal column
Details
Identifiers
Latin	Papilla Renalis
TA	A08.1.01.027
FMA	15622
Anatomical terminology [edit on Wikidata]

The renal papilla is the location where the renal pyramids in the medulla empty urine into the minor calyx in the kidney. Histologically it is marked by medullary collecting ducts converging to form a papillary duct to channel the fluid. Transitional epithelium begins to be seen.

Clinical significance

Some chemicals toxic to the kidney, called nephrotoxins, exert their damage at the renal papillae. Damage to the renal papillae may result in death to cells in this region of the kidney, called renal papillary necrosis. The most common toxic causes of renal papillary necrosis are NSAIDs, such as ibuprofen, acetylsalicylic acid, and phenylbutazone, in combination with dehydration. Perturbed renal papillary development has also been shown to be associated with onset of functional obstruction and renal fibrosis.^[1][2][3]

Additional Images

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  Renal papilla

References

1. Wilkinson, L; Kurniawan, ND; Phua, YL; Nguyen, MJ; Li, J; Galloway, GJ; Hashitani, H; Lang, RJ; Little, MH (August 2012). "Association between congenital defects in papillary outgrowth and functional obstruction in Crim1 mutant mice.". The Journal of pathology 227 (4): 499–510. PMID 22488641.
2. Phua, YL; Gilbert, T; Combes, A; Wilkinson, L; Little, MH (April 2016). "Neonatal vascularization and oxygen tension regulate appropriate perinatal renal medulla/papilla maturation.". The Journal of pathology 238 (5): 665–76. PMID 26800422.
3. Phua, YL; Martel, N; Pennisi, DJ; Little, MH; Wilkinson, L (April 2013). "Distinct sites of renal fibrosis in Crim1 mutant mice arise from multiple cellular origins.". The Journal of pathology 229 (5): 685–96. PMID 23224993.

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

• Anatomy photo:40:06-0107 at the SUNY Downstate Medical Center - "Posterior Abdominal Wall: Internal Structure of a Kidney"
• Histology image: 15901loa – Histology Learning System at Boston University - "Urinary System: neonatal kidney"
• posteriorabdomen at The Anatomy Lesson by Wesley Norman (Georgetown University) (renalpelvis)