Which abbreviation refers to difficulty passing urine as a result of an obstruction at the base of the bladder?

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BNO stands for "bladder neck obstruction", which refers to difficulty passing urine as a result of an obstruction at the base of the bladder. GC stands for "gonorrhea", PSA stands for "prostate-specific antigen", and TURP stands for "transurethral resection of the prostate", which is a surgical procedure to treat an enlarged prostate that may be causing urinary problems. ED stands for "erectile dysfunction", which is a different condition unrelated to urinary obstruction.

Which Abbreviation Refers to Difficulty Passing Urine as a Result