Anterior urethral injury is just injury to any portion of the spongy urethra
The bulbous urethra is just 1 portion of the anterior urethral and the smaller portion of it.
AMBOSS:
"Injury to the anterior urethra, which lies within the corpus spongiosum and consists of the bulbous and pendulous urethra"
definition for spongy urethra: "A portion of male urethra that lies within the corpus spongiosum. Consists of the bulbous and pendulous parts of the urethra."
https://next.amboss.com/us/article/9i0NFf?guid=d%2521%2525kqR%2524%257B3O&aid=c911976e-7577-4000-9e68-d6f38cab1dfe&uid=2M0UTLgba#Z2b56ecffc94803423f5dfc399101a180
I think this card says bulbous because of this other card
nid:1518909515112
"Anterior urethral injuries are typically caused by a(n) {{c1::perineal straddle}} injury" this mechanism specifically injuries the bulbous part of the anterior urethra