A patient is brought to the hospital with history of A 8 hours back. A few drops of blood were noted at the external urethral meatus. He has not passed urine and his bladder is palpable per abdomen. What is the probable diagnosis
**Core Concept**
The patient's presentation suggests an obstructive uropathy, specifically a urethral obstruction, which can lead to urinary retention and hematuria. The external urethral meatus is the external opening of the urethra, and blood at this site indicates a possible urethral injury or trauma.
**Why the Correct Answer is Right**
The patient's symptoms are consistent with a diagnosis of posterior urethral injury or rupture, often seen in the context of pelvic trauma. The presence of hematuria and urinary retention suggests an obstruction at the level of the urethra. The mechanism of injury likely involves a sudden increase in intra-abdominal pressure, such as in a motor vehicle accident, which can cause a posterior urethral injury. The inability to void urine (urinary retention) and the palpable bladder indicate a complete obstruction.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the patient's presentation. A urethral stricture typically presents with a gradual onset of obstructive symptoms, such as difficulty voiding or weak urine flow, rather than acute urinary retention and hematuria.
**Option B:** This option is incorrect because a bladder neck contracture typically presents with obstructive symptoms, such as difficulty voiding or weak urine flow, but does not usually cause hematuria at the external urethral meatus.
**Option C:** This option is not relevant to the patient's presentation. A neurogenic bladder typically presents with symptoms of urinary retention, but the presence of hematuria at the external urethral meatus suggests a mechanical obstruction rather than a neurological issue.
**Option D:** This option is incorrect because a prostatic abscess typically presents with symptoms of urinary retention, fever, and irritability, but does not usually cause hematuria at the external urethral meatus.
**Clinical Pearl / High-Yield Fact**
In patients with a history of pelvic trauma, a high index of suspicion for posterior urethral injury or rupture should be maintained, as this can lead to significant morbidity if not promptly diagnosed and treated.
**Correct Answer:** C. Posterior urethral injury or rupture.