Berhan Genc, Abstract Co-Author: Nothing to Disclose

Mecit Kantarci, Presenter: Nothing to Disclose

Aynur Solak, Abstract Co-Author: Nothing to Disclose

Neslin Sahin MD, Abstract Co-Author: Nothing to Disclose

Mine Genc, Abstract Co-Author: Nothing to Disclose

Hayri Ogul, Abstract Co-Author: Nothing to Disclose

Oya Sivrikoz, Abstract Co-Author: Nothing to Disclose

Berhan Pirimoglu MD, Abstract Co-Author: Nothing to Disclose

To investigate the utility of difusion weighted (DW) Magnetic Resonance (MR) imaging in the diagnosis of abdominal wall endometrioma (AWE) and to compare ADC values of AWE with uterine endometrium, during different two phases of menstrual cycle.

21 women with 25 AWE lesions, ages between 27 – 42 (mean:32.8), with regular menstrual cyclus were included in the study. The mean and standard deviation of the apparent diffusion coefficient (ADC) values of normal endometrium/AWE were calculated for menstrual and luteal phases. All examinations were performed with a 1.5 T magnet (b values: 50,400 and 800 mm/s2). The results were analyzed by means Shapiro Wilk, Pearson correlation test, ANOVA test and Paired sample t-test per data.

The ADC values of the endometrium were different in the two phases of the menstrual cycle (menstrual phase: 0.924±0.256; luteal phase: 1.256±0.215) Similarly the ADC values of AWEs were different in these phases (menstrual phase: 0.924±0.171, luteal phase: 1.171±0.135). Both ADC measurements (AWE and uterine endometrium) were significantly lower in the menstrual phase than during the luteal phase and statistical significant difference was observed between menstrual and luteal phase (p < 0.05). There was no significant difference in ADC values between endometrial layer and AWE, in the same phase (p=0.216 for menstrual phase, p=0.104 for luteal phase, paired sample t-test).

This study demonstrated that the DWI features of AWEs were significantly similar to the uterine endometrial tissue in all patients and they show similar cyclic changes on ADC measurements. These preliminary results sugest that ADC values of lesion close to the uterine endometrium may be used to differentiate AWE from the other pathologic conditions of abdominal wall.

DWI particularly ADC measurements together with uterine endometrial lining, provide useful information for diagnosis of AWE.

Genc, B, Kantarci, M, Solak, A, Sahin, N, Genc, M, Ogul, H, Sivrikoz, O, Pirimoglu, B, Diffusion Weighted Imaging in the Evaluation of Hormonal Cyclic Changes in Abdominal Wall Endometriomas.  Radiological Society of North America 2013 Scientific Assembly and Annual Meeting, December 1 - December 6, 2013 ,Chicago IL. http://archive.rsna.org/2013/13018061.html