All the features of membranous urethral injury except
**Core Concept**
Membranous urethral injuries are a type of urethral trauma that occurs at the junction of the urethra and the prostate gland, specifically at the membranous urethra. This region is anatomically vulnerable due to its location between the pubic symphysis and the coccyx.
**Why the Correct Answer is Right**
Membranous urethral injuries typically present with a high-riding prostate on rectal examination, blood at the urethral meatus, and difficulty voiding. The injury often occurs due to a sudden increase in intra-abdominal pressure, which can cause a separation of the pubic symphysis and subsequent disruption of the membranous urethra. This type of injury is often associated with pelvic fractures.
**Why Each Wrong Option is Incorrect**
**Option A:** Not applicable, as the question requires identification of an exception.
**Option B:** The inability to void is a characteristic feature of membranous urethral injuries.
**Option C:** Blood at the urethral meatus is a common finding in membranous urethral injuries.
**Option D:** A high-riding prostate on rectal examination is a classic sign of membranous urethral injury.
**Clinical Pearl / High-Yield Fact**
In cases of suspected urethral injury, a retrograde urethrogram (RUG) is often performed to evaluate the integrity of the urethra. This imaging modality involves injecting contrast material into the urethra through a catheter to visualize the urethral lumen and identify any disruptions.
**Correct Answer:** A.