Write the types of renal calculus with features

ashfaq ahmed
Renal calculi, also known as kidney stones, are solid masses that form in the urinary tract. There are different types of renal calculi, each with its own unique features. Here are the four main types of renal calculi and their features:

1. Calcium stones: These are the most common type of renal calculi, accounting for up to (61-75)% of all cases. They are composed of calcium oxalate or calcium phosphate and can be caused by a variety of factors such as high levels of calcium in the urine, dehydration, and certain medications. Appearance: Envelope or dumbbell shaped. Presentation age: In any age. Approx. ratio men vs women: 2:1 . Recurrence: 38%

2. Uric acid stones: These stones are formed when there is an excess of uric acid in the urine. They account for 95-15)% of all renal calculi cases. Uric acid stones are often softer than other types of stones and can be dissolved with medication. Appearance: Amorphous or wedge shaped. Presentation age: In any age. Approx. ratio men vs women: 1:2 . Recurrence: 43%

3. Struvite stones: These stones are also known as infection stones because they are caused by urinary tract infections. They account for (5-15)% of all renal calculi cases. Struvite stones can grow quickly and become quite large, sometimes filling the entire kidney. Appearance: Coffin-lid shaped. Presentation age: In any age. Approx. ratio men vs women: 1:3 . Recurrence: 41%

4. Cystine stones: These stones are rare and hereditary. They account for only (1-2)% of all renal calculi cases. Cystine stones are caused by a genetic disorder that affects the way the body processes certain amino acids. Appearance: Hexagon shaped. Presentation age: most frequently in 0-20 age. Approx. ratio men vs women: 2:1. Recurrence: 89%

5. Uric acid: They account for only (10-15)% of all renal calculi cases. Appearance: Rhomboid shaped. Presentation age: most frequently in 60-65 age. Approx. ratio men vs women: 4:1. Recurrence: 51%