Introduction to Urology
Urology is the surgical and medical care of the urinary tract in both sexes and the male genital tract — and almost every problem is one of six things: obstruction, infection, cancer, stones, dysfunction, or trauma.
The big picture
Urology covers the kidneys, ureters, bladder and urethra in everyone, plus the prostate and male genitalia. It is uniquely both a medical and a surgical specialty: the same urologist manages a stone medically, resects a tumour, and counsels a couple on fertility. The unifying skill is pattern recognition across a small number of problem types.
Frame the problem (obstruction / infection / cancer / stones / function / trauma), then ask 'how urgent?' — emergencies are defined by threatened kidneys, testes, or life, not by symptom severity alone.
Anatomy map
- Upper tract: the kidneys (with the adrenals sitting on top) and the ureters that drain them — the territory of stones, obstruction, renal masses and upper-tract urothelial cancer.
- Lower tract: the bladder and urethra — storage and voiding, bladder cancer, outlet obstruction and incontinence.
- Prostate: surrounds the male urethra — benign enlargement (BPH), prostatitis and prostate cancer.
- Male genitalia: testes, epididymis, vas, penis — torsion, tumours, infection, fertility and sexual function.
- The adrenal glands, though endocrine, are removed by urologists and so sit within the specialty.
- Medical urology (stones prevention, infection, BPH drugs, sexual/fertility medicine) and surgical urology (endoscopy, laparoscopy, robotics, open reconstruction) are both core — the specialty spans clinic and theatre.
- Imaging (ultrasound, CT, MRI, nuclear medicine) is woven through every pathway — the next two Foundations modules cover the tests and imaging in detail.
- Pain in the urinary tract usually means obstruction (a stretched, blocked system), not the lesion itself.
- A urological emergency threatens an organ (kidney, testis) or life (sepsis, bleeding) — recognise tempo first.
Classification & subtypes
Obstruction
Something blocks urine flow (stone, prostate, stricture, tumour).
- Why it matters:
- Raises pressure and damages the kidney; with infection it becomes an emergency.
- Management:
- Relieve the obstruction (drain, stent, resect).
- Memory hook:
- Blocked flow → pressure → organ at risk.
- Board trap:
- Obstruction + infection is a drain-first emergency.
Infection
Bacterial (or other) infection of the tract or genitalia.
- Why it matters:
- Common, but dangerous when obstructed or in Fournier's gangrene.
- Management:
- Antibiotics + source control where needed.
- Memory hook:
- Treat symptoms, drain pus.
- Board trap:
- Antibiotics alone cannot clear an obstructed infected system.
Cancer
Malignancy of kidney, urothelium, prostate, testis, penis or adrenal.
- Why it matters:
- Staged and treated by organ and extent.
- Management:
- Diagnose, stage, treat by stage; surveil.
- Memory hook:
- Painless visible haematuria = cancer until excluded.
- Board trap:
- Dismissing painless haematuria.
Stones
Crystallisation of urinary solutes into calculi.
- Why it matters:
- Cause colic, obstruction and infection; recur.
- Management:
- Relieve danger, treat by size/site, prevent by chemistry.
- Memory hook:
- Pain is the obstruction, not the stone.
- Board trap:
- Fever + obstruction = drain.
Function
Storage/voiding, continence, sexual and fertility disorders.
- Why it matters:
- Quality-of-life dominant; mechanism-driven therapy.
- Management:
- Match drug/behaviour/surgery to the failing mechanism.
- Memory hook:
- Pipe vs pump vs nerve.
- Board trap:
- Treating the gland and forgetting the bladder.
Trauma
Injury to kidney, bladder, urethra or genitalia.
- Why it matters:
- Graded; some managed conservatively, some need surgery.
- Management:
- Resuscitate, image, grade, intervene selectively.
- Memory hook:
- Blood at the meatus → image the urethra before catheter.
- Board trap:
- Blind catheterisation in suspected urethral injury.
Red flags
Septic obstructed kidney — urgent decompression, not just antibiotics.
Testicular torsion until proven otherwise — explore.
Catheterise; high-pressure retention threatens the kidneys.
Exclude urinary-tract cancer.
Consider Fournier's gangrene — surgical emergency.
Summary tables
Medical vs surgical, emergency vs elective
| Axis | Examples | Key point |
|---|---|---|
| Medical urology | Stone prevention, BPH drugs, infection, fertility, sexual medicine | Much of urology is non-operative |
| Surgical urology | Endoscopy, laparoscopy, robotics, open reconstruction | Mechanism leads to the operation |
| Emergency | Septic obstruction, torsion, Fournier's, high-pressure retention, major bleeding | Action in hours |
| Elective | Most cancers, BPH, stones, fertility | Planned work-up and treatment |
Memory hooks
Six lenses: Obstruction, Infection, Cancer, Stones, Function, Trauma.
Pain = obstruction (pressure), not the lesion.
Emergencies threaten an organ or life.
Painless visible haematuria = cancer until excluded.
Fever + obstruction = drain.
Board traps
Obstruction + infection treated with antibiotics alone.
Sudden scrotal pain sent for non-urgent ultrasound.
Painless haematuria attributed to infection without work-up.
Catheter forced despite blood at the meatus.
Clinical cases
A 60-year-old presents with fever, rigors, left loin pain and a known ureteric stone with hydronephrosis.
Through which lens do you frame this, and what is the tempo?