Urology mnemonic

Differential of scrotal swelling by transillumination

The mnemonic

Fluid lights up, solid does not

What each word stands for

  • FluidHydrocele and epididymal cyst transilluminate
  • SolidTesticular tumour does not transilluminate
  • BloodHaematocele does not transilluminate
  • BowelHernia does not transilluminate (adult)

Why it matters clinically

A swelling that does not transilluminate needs ultrasound to exclude a tumour.

Where it stops being reliable

Infant hernias and hydroceles can transilluminate, so ultrasound is still needed.

Teaching aid, still awaiting independent review. Confirm facts in a standard source.

More mnemonics

Common questions

What is the Urology mnemonic?

Fluid lights up, solid does not. It helps you recall: Differential of scrotal swelling by transillumination.

What does "Fluid" stand for?

Hydrocele and epididymal cyst transilluminate

What does "Solid" stand for?

Testicular tumour does not transilluminate

What does "Blood" stand for?

Haematocele does not transilluminate

What are all the parts of the Fluid lights up, solid does not mnemonic?

Fluid: Hydrocele and epididymal cyst transilluminate; Solid: Testicular tumour does not transilluminate; Blood: Haematocele does not transilluminate; Bowel: Hernia does not transilluminate (adult).

Which topic does this mnemonic belong to?

It belongs to Urology in General Surgery.

Where does this mnemonic stop being reliable?

Infant hernias and hydroceles can transilluminate, so ultrasound is still needed.

How is this useful clinically?

A swelling that does not transilluminate needs ultrasound to exclude a tumour.

How do I make this mnemonic stick?

Say it aloud, write it from memory tomorrow, then again in a week. Then test yourself on a General Surgery question about Urology.

Is this a standard mnemonic?

It is a teaching aid written or adapted by our team. Some resemble ones students share informally. Check any fact that matters in a standard source.