Bone tumours mnemonic

Bone tumours by location in the long bone

The mnemonic

E-M-D

What each word stands for

  • EEpiphysis: giant cell tumour (adult), chondroblastoma (adolescent)
  • MMetaphysis: osteosarcoma, osteochondroma
  • DDiaphysis: Ewing sarcoma

Why it matters clinically

Site on the radiograph narrows the differential quickly.

Where it stops being reliable

Lists the classic site only; many tumours overlap zones, such as Ewing sarcoma also in the metadiaphysis.

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

More mnemonics

Common questions

What is the Bone tumours mnemonic?

E-M-D. It helps you recall: Bone tumours by location in the long bone.

What does "E" stand for?

Epiphysis: giant cell tumour (adult), chondroblastoma (adolescent)

What does "M" stand for?

Metaphysis: osteosarcoma, osteochondroma

What does "D" stand for?

Diaphysis: Ewing sarcoma

What are all the parts of the E-M-D mnemonic?

E: Epiphysis: giant cell tumour (adult), chondroblastoma (adolescent); M: Metaphysis: osteosarcoma, osteochondroma; D: Diaphysis: Ewing sarcoma.

Which topic does this mnemonic belong to?

It belongs to Bone tumours in Orthopaedics.

Where does this mnemonic stop being reliable?

Lists the classic site only; many tumours overlap zones, such as Ewing sarcoma also in the metadiaphysis.

How is this useful clinically?

Site on the radiograph narrows the differential quickly.

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 Orthopaedics question about Bone tumours.

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.