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Pathology - Renal Calculi
Crystal aggregates that originate in the renal collecting ducts but can deposit anywhere in the urine tract are known as urinary calculi. The study of epidemiology • Frequent, with a 15% lifetime incidence • The risk is larger for men than for women (3:1). Types of stones • 75% calcium oxalate. Ammonium phosphate of magnesium (15%) 5% of stones are uric acid
The pathogenesis • Hypercalciuria is linked to calcium stones. The majority of patients have absorptive hypercalciuria, a condition in which the intestines absorbs excessive amounts of calcium. Others suffer from renal hypercalciuria, a condition where the proximal tubule's ability to absorb calcium is compromised. A small percentage of people experience hypercalciuria as a result of hypercalcaemia, which is typically brought on by primary hyperparathyroidism. Infections with organisms like Proteus, which produce the urease enzyme that breaks down urea into ammonia, are a major cause of triple stones.
Ammonia causes the urine to become alkaline and encourages the precipitation of magnesium ammonium phosphate salts. Triple stones have the potential to grow to enormous sizes and develop into branching masses that fill the renal pelvis and calyces (staghorn calculus).
• Patients with hyperuricaemia, such as those with gout, and diseases characterized by fast cell turnover, such as leukemias, may develop uric acid stones. The majority of individuals, however, do not have elevated uric acid excretion in their urine or hyperuricaemia. These people are believed to have a propensity to produce slightly acidic urine, which increases the risk of developing uric acid. Presentation: Big stones usually stay inside the kidney. They could be detected during a checkup for recurrent UTls or haematuria, or they could be asymptomatic.
• Urinary colic can result from smaller stones getting lodged in the ureter. The vesicoureteric junction, pelvic brim, and pelviureteric junction are frequently the sites of impaction. Issues · A superadded infection in a blocked urinary tract or any obstruction inside the tract of a single kidney is a urological emergency requiring rapid intervention. > Complete obstruction of the urinary tract necessitates prompt intervention to remove the stone.
Crystal aggregates that originate in the renal collecting ducts but can deposit anywhere in the urine tract are known as urinary calculi. The study of epidemiology • Frequent, with a 15% lifetime incidence • The risk is larger for men than for women (3:1). Types of stones • 75% calcium oxalate. Ammonium phosphate of magnesium (15%) 5% of stones are uric acid
The pathogenesis • Hypercalciuria is linked to calcium stones. The majority of patients have absorptive hypercalciuria, a condition in which the intestines absorbs excessive amounts of calcium. Others suffer from renal hypercalciuria, a condition where the proximal tubule's ability to absorb calcium is compromised. A small percentage of people experience hypercalciuria as a result of hypercalcaemia, which is typically brought on by primary hyperparathyroidism. Infections with organisms like Proteus, which produce the urease enzyme that breaks down urea into ammonia, are a major cause of triple stones.
Ammonia causes the urine to become alkaline and encourages the precipitation of magnesium ammonium phosphate salts. Triple stones have the potential to grow to enormous sizes and develop into branching masses that fill the renal pelvis and calyces (staghorn calculus).
• Patients with hyperuricaemia, such as those with gout, and diseases characterized by fast cell turnover, such as leukemias, may develop uric acid stones. The majority of individuals, however, do not have elevated uric acid excretion in their urine or hyperuricaemia. These people are believed to have a propensity to produce slightly acidic urine, which increases the risk of developing uric acid. Presentation: Big stones usually stay inside the kidney. They could be detected during a checkup for recurrent UTls or haematuria, or they could be asymptomatic.
• Urinary colic can result from smaller stones getting lodged in the ureter. The vesicoureteric junction, pelvic brim, and pelviureteric junction are frequently the sites of impaction. Issues · A superadded infection in a blocked urinary tract or any obstruction inside the tract of a single kidney is a urological emergency requiring rapid intervention. > Complete obstruction of the urinary tract necessitates prompt intervention to remove the stone.
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