The urine features present in hematuria of glomerular origin except
**Core Concept:**
Hematuria, or the presence of blood in urine, can have various causes. Glomerular hematuria, originating from glomeruli, is characterized by certain features. Glomeruli are tiny filtering units in the kidneys that help maintain fluid and electrolyte balance, and remove waste products from the blood. When they are damaged, it leads to hematuria.
**Why the Correct Answer is Right:**
The correct answer refers to the specific features that are not typically observed in glomerular hematuria. Glomerular hematuria is usually associated with microscopic hematuria, meaning the presence of many red blood cells in urine without visible red blood cell casts under a light microscope. This type of hematuria is often asymptomatic and may be detected incidentally during routine urine testing.
**Why Each Wrong Option is Incorrect:**
A. Macroscopic hematuria: This refers to the presence of visible red blood cell casts in urine under a light microscope. This is different from microscopic hematuria seen in glomerular origin and is not the correct answer.
B. Hematuria associated with visible casts: Hematuria with visible red blood cell casts is indicative of a different cause, such as tubular damage or obstruction, which is not the focus of the question.
C. Hematuria due to infection: Although infection can cause hematuria, the question is specifically about hematuria of glomerular origin, making this option incorrect.
D. Hematuria with dysuria: Dysuria refers to the presence of pain or discomfort during urination. While infections can cause hematuria and dysuria, the question is specifically asking about hematuria of glomerular origin, making this option incorrect.
**Clinical Pearl:**
In clinical practice, it is essential to differentiate between various causes of hematuria to guide appropriate management and prognosis. While hematuria of glomerular origin may be asymptomatic, other causes may require urgent attention, such as infections, obstructive uropathy, or malignancies. A detailed history, physical examination, and further diagnostic tests (e.g., urinalysis, urine culture, and imaging studies) will help to identify the underlying cause.
**Correct Answer:**
The correct answer is **Macroscopic hematuria** (option A). Macroscopic hematuria refers to the presence of visible red blood cell casts in urine under a light microscope, which is different from microscopic hematuria seen in glomerular hematuria. Macroscopic hematuria is more likely due to tubular damage or obstruction, which could be caused by various underlying diseases or conditions, such as interstitial nephritis, pyelonephritis, or stone disease.