Gynaecological oncology: malignant transformation in dermoid cyst: practice question

A OBG 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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OBG · Gynaecological oncology: malignant transformation in dermoid cyst

Sample item

Which is the commonest malignancy arising in a mature cystic teratoma of the ovary?

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

The answer and the reasoning

D. Squamous cell carcinoma

Malignant change in a dermoid cyst is uncommon and usually affects older women. The ectodermal lining gives rise to squamous cell carcinoma in most cases.

Option by option

  • A. Adenocarcinoma

    Adenocarcinoma is a less common transformation.

  • B. Basal cell carcinoma

    Basal cell carcinoma is rare in this setting.

  • C. Choriocarcinoma

    Choriocarcinoma arises from trophoblastic tissue.

  • D. Squamous cell carcinoma (correct)

    Correct. Squamous carcinoma of the ectodermal lining is the commonest.

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.

More OBG questions

Questions about this OBG question

What is the answer to this OBG question?

The best answer is D, Squamous cell carcinoma. Malignant change in a dermoid cyst is uncommon and usually affects older women.

Why is "Adenocarcinoma" not the answer?

Adenocarcinoma is a less common transformation.

Why is "Basal cell carcinoma" not the answer?

Basal cell carcinoma is rare in this setting.

Why is "Choriocarcinoma" not the answer?

Choriocarcinoma arises from trophoblastic tissue.

What concept does this question test?

It tests Gynaecological oncology: malignant transformation in dermoid cyst in OBG. The ectodermal lining gives rise to squamous cell carcinoma in most cases.

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 oncology: malignant transformation in dermoid cyst?

Learn management algorithms as steps: PPH, eclampsia, ectopic pregnancy. Then use the flashcards and the other OBG 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.