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Surgery - Benign Prostatic Hyperplasia 
Introduction 
The most common cause of lower urinary tract symptoms in adult males is nodular hyperplasia of the prostate gland's periurethral (transitional) zone, which progresses gradually.


Etiology 
Unknown exact cause; linked to age, exposure to testosterone and dihydrotestosterone.
A pseudocapsule of compressed peripheral zone glandular tissue envelops the epithelial and stromal hyperplasia of the prostate's periurethral transition zone.

Epidemiology 
Frequent: West>Far East, Afro-Carribean>Caucasian men are more likely than East men to have histological benign prostate hypherplasia (BPH), which affects 70% of men over the age of 70. Of them, 50% have substantial symptoms.

History 

Hesitancy, a weak or irregular stream, terminal dribbling, and incomplete emptying are examples of obstructive signs.

Frequency, urgency, urge incontinence, and nocturia are indicative of irritation/storage. 
An assessment tool for symptoms and therapy response is the International Prostate Symptom Score.
Acute retention is characterized by an abrupt inability to urinate and excruciating pain.
Chronic retention: Frequency and painless passage of tiny amounts of pee, particularly during night.

Examination 

The prostate is frequently enlarged during digital rectal examination; however, there is frequently little relationship between the size and symptoms, and if the prostate is noduled, prostate cancer should be feared.
Acute retention manifests as enlarged, palpably felt bladder and suprapubic discomfort.
Chronic retention: A large, distended bladder that is painless (residual volumes greater than 1 L), possibly accompanied by indications of renal failure.

Investigational studies
Bloods: PSA, U&Es for kidney function.
Urine: For sensitivity, culture, and microscopy.
Imaging: Renal tract ultrasound imaging to look for upper urinary tract dilatation. Pre- and post-voiding volumes are measured using bladder scanning.
Transrectal ultrasound: To guide biopsies and quantify prostate size.
Histopathology: Prostate periurethal transition zone epithelial and stromal hyperplasia is encircled by a pseudocapsule made of compressed peripheral zone glandular tissue.
Flexible cystoscopy: To see changes in the bladder, such as trabeculation, and the bladder outlet.
Others: Flowmetry investigations of urinary flow.

Management 
Depending on how severe the symptoms are and whether there are any consequences.
Urinary catheterization in cases of acute retention is an emergency.
Conservative: If symptoms are moderate, monitoring them with the IPSS questionnaire while exercising caution may be necessary.
Health: Alfuzosin and tamsulosin are examples of selective a-blockers that relax the smooth muscle of the prostate capsule and the internal (bladder neck) sphincter. 5 a-reductase inhibitors, such as finasteride, work by preventing the conversion of testosterone to dihydrotestosterone; they can lower prostate growth by 20%, but results may not be seen right away.
Surgery: Prostate excision from within the urethra is known as transurethral resection of the prostate (TURP), and it can be accomplished using a number of techniques, including laser and electrocautery.
Usually reserved for very large glands (>60 g), open prostatectomy (retropubic or suprapubic approaches) can be carried out via open surgery, laparoscopic, or robot-assisted surgery.

Complications 
urinary stasis, bladder stones or diverticulae, acute or chronic urine retention, recurrent urinary infections, obstructive renal failure, and post-obstructive diuresis.
From TURP, the following conditions are common: retrograde ejaculation; hemorrhage (primary, reactionary, or secondary 2–10%); clot retention; incontinence; TUR syndrome (seizures or cardiovascular collapse caused by hypervolaemia and hyponatraemia due to absorption of glycine irrigation fluid); erectile dysfunction; late: urethral stricture.

Prognosis 
Medical treatments can help with mild symptoms, but surgical surgery typically provides great relief for patients with more severe problems.
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