Gynaecological imaging: dermoid: practice question

A Radiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Radiology · Gynaecological imaging: dermoid

Sample item

An ultrasound of a young woman shows an ovarian mass with a hyperechoic nodule, acoustic shadowing and echogenic lines (dermoid plug and dot-dash pattern). CT shows fat and a tooth. What is the diagnosis?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. Mature cystic teratoma

Mature cystic teratoma contains tissues from all three germ layers and shows fat, calcification and a Rokitansky nodule. It is the commonest ovarian germ cell tumour. Torsion is the commonest complication.

Option by option

  • A. Serous cystadenoma

    Serous cystadenoma is a thin-walled cyst with no fat.

  • B. Endometrioma

    Endometrioma shows homogeneous low-level echoes (ground glass).

  • C. Dysgerminoma

    Dysgerminoma is a solid tumour with lobulated septa.

  • D. Mature cystic teratoma (correct)

    Correct. Fat and teeth in an ovarian mass indicate a dermoid.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

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Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is D, Mature cystic teratoma. Mature cystic teratoma contains tissues from all three germ layers and shows fat, calcification and a Rokitansky nodule.

Why is "Serous cystadenoma" not the answer?

Serous cystadenoma is a thin-walled cyst with no fat.

Why is "Endometrioma" not the answer?

Endometrioma shows homogeneous low-level echoes (ground glass).

Why is "Dysgerminoma" not the answer?

Dysgerminoma is a solid tumour with lobulated septa.

What concept does this question test?

It tests Gynaecological imaging: dermoid in Radiology. It is the commonest ovarian germ cell tumour. Torsion is the commonest complication.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Gynaecological imaging: dermoid?

Learn signs with the image, and the disease they point to. Then use the flashcards and the other Radiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.