Systemic pathology: bone and soft tissue mnemonic

Bone tumours and their radiological signs

The mnemonic

Sunburst, Onion, Soap bubble

What each word stands for

  • SunburstOsteosarcoma, also Codman triangle
  • OnionEwing sarcoma, layered periosteal reaction
  • Soap bubbleGiant cell tumour at the epiphysis

Why it matters clinically

Allows a diagnosis from the radiograph before biopsy confirmation.

Where it stops being reliable

Signs are suggestive and overlap; histology is needed to confirm.

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

More mnemonics

Common questions

What is the Systemic pathology: bone and soft tissue mnemonic?

Sunburst, Onion, Soap bubble. It helps you recall: Bone tumours and their radiological signs.

What does "Sunburst" stand for?

Osteosarcoma, also Codman triangle

What does "Onion" stand for?

Ewing sarcoma, layered periosteal reaction

What does "Soap bubble" stand for?

Giant cell tumour at the epiphysis

What are all the parts of the Sunburst, Onion, Soap bubble mnemonic?

Sunburst: Osteosarcoma, also Codman triangle; Onion: Ewing sarcoma, layered periosteal reaction; Soap bubble: Giant cell tumour at the epiphysis.

Which topic does this mnemonic belong to?

It belongs to Systemic pathology: bone and soft tissue in Pathology.

Where does this mnemonic stop being reliable?

Signs are suggestive and overlap; histology is needed to confirm.

How is this useful clinically?

Allows a diagnosis from the radiograph before biopsy confirmation.

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 Pathology question about Systemic pathology: bone and soft tissue.

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.