Question:

The commonest locations for malignancies associated with endometriosis include the following:
1. Endometriotic cyst
2. Sigmoid colon
3. Sigmoid colon
4. Ureter
5. Rectovaginal septum





Answer:

The correct answers for the question "The commonest locations for malignancies associated with endometriosis include the following:" are:

1. Endometriotic cyst

2. Sigmoid colon

5. Rectovaginal septum



Explanation
The most common locations of malignant tumors associated with endometriosis include endometriomas, followed by the rectum, sigmoid colon and rectovaginal septum. (Approximately 75% of tumors in patients with endometriosis arise in endometriotic cysts and less often in the rectovaginal septum, rectum and sigmoid colon).



From the manuscript:
Malignant transformation of an endometriotic cyst: MDCT and MR findings
Radiology Case. 2011 Jan; 5(1):9-17


This article belongs to the GU section.




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From the manuscript

Malignant transformation of an endometriotic cyst: MDCT and MR findings

Free full text article: Malignant transformation of an endometriotic cyst: MDCT and MR findings

Abstract
Malignant transformation is a rare complication of endometriosis. MR criteria for diagnosis include the presence of soft-tissue components, enhancement after contrast material administration in an endometriotic cyst. We present the multidetector CT and MR imaging findings in a case of an incidentally found endometrioid adenocarcinoma in a left-sided ovarian endometrioma, occurring in a 30-year old woman. MR imaging enabled the correct preoperative characterization of the lesion, by depicting a soft-tissue element, with strong and early enhancement after gadolinium administration. The same area had high signal intensity on diffusion-weighted images and low apparent diffusion coefficient values due to restricted diffusion, findings also strongly suggestive of malignancy.






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