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Related Concept Videos

Diverticular Disease of the Colon01:27

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Diverticular disease involves the formation of diverticula—small sac-like outpouchings of the colonic wall—and their complications. It most commonly affects the sigmoid colon due to higher intraluminal pressure and structural vulnerability. It results from structural weakness and increased pressure in the colon, producing pseudodiverticula that may remain silent or progress to inflammation and serious complications.Structure of DiverticulaIn diverticulosis, these outpouchings are...
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Appendicitis is an acute inflammatory condition of the vermiform appendix, most commonly caused by obstruction of its lumen. The appendix is a narrow, blind-ended pouch that extends from the cecum, making it particularly prone to obstruction. Causes include fecaliths, lymphoid hyperplasia (often after viral infections), parasites, tumors, or foreign bodies. This obstruction initiates a cascade of pathological changes.Luminal Obstruction and Early InflammationAfter obstruction, normal mucosal...
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Renal calculi, commonly termed kidney stones, are crystalline solid masses that form in the kidneys but can occur at any point within the urinary system, encompassing the kidneys, ureters, bladder, and urethra.The pathophysiology of renal stones involves several key factors: supersaturation of the urine with stone-forming constituents, changes in urine pH, a decrease in urine volume, and the presence of substances that promote or inhibit stone formation.Supersaturation of Urine: This is the...
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Calyceal diverticula: a comprehensive review.

Nikhil Waingankar1, Samih Hayek2, Arthur D Smith1

  • 1The Arthur Smith Institute for Urology, Hofstra North Shore-LIJ School of Medicine, New Hyde Park, NY.

Reviews in Urology
|May 3, 2014
PubMed
Summary

Calyceal diverticula, often congenital, frequently harbor stones. Treatment options like shock wave lithotripsy, ureteroscopy, and percutaneous nephrolithotomy vary in effectiveness and patient outcomes.

Keywords:
Calyceal diverticulaLaparoscopic surgeryPercutaneous nephrostolithotomyShock wave lithotripsyUreterorenoscopy

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Area of Science:

  • Urology
  • Nephrology
  • Surgical Science

Background:

  • Calyceal diverticula are uncommon congenital outpouchings of the renal collecting system.
  • Stones are present in up to 50% of calyceal diverticula, with 96% of symptomatic patients presenting with stones.

Purpose of the Study:

  • To review current theories on the pathogenesis of calyceal diverticula.
  • To examine current classification and diagnostic methods.
  • To summarize literature on the outcomes of different treatment approaches for stone-bearing calyceal diverticula.

Main Methods:

  • Literature review of pathogenesis, classification, diagnosis, and treatment outcomes.
  • Analysis of diagnostic modalities including intravenous urography and computed tomography urogram.
  • Evaluation of various treatment modalities: shock wave lithotripsy (SWL), ureteroscopy (URS), percutaneous nephrolithotomy, and laparoscopic surgery.

Main Results:

  • SWL is a first-line option for select cases but has the lowest stone-free rates, though many patients become asymptomatic.
  • Ureteroscopy is suitable for anterior mid- to upper-pole stones but faces challenges with ostium identification and obliteration rates.
  • Percutaneous management is effective for posterior stones and allows diverticulum ablation; laparoscopic surgery offers definitive treatment for refractory or complex cases.

Conclusions:

  • Treatment choice for calyceal diverticula with stones depends on stone burden, location, and diverticulum characteristics.
  • While SWL offers symptomatic relief, other modalities like percutaneous or laparoscopic approaches may provide higher stone-free rates or definitive management.
  • Further research may refine optimal treatment strategies for this rare condition.