Dirk Timmerman

OBJECTIVE: To evaluate the performance of transvaginal ultrasound (TVS) using the International Deep Endometriosis Analysis (IDEA) terminology in the detection of deep endometriosis (DE). DESIGN: International multicenter prospective diagn…

BACKGROUND: Several diagnostic prediction models to help clinicians discriminate between benign and malignant adnexal masses are available. This study is a head-to-head comparison of the performance of the Assessment of Different NEoplasias…

IMPORTANCE: Approximately 60% of women develop a uterine niche after a cesarean delivery (CD). A niche is associated with various gynecological symptoms including abnormal uterine bleeding, pain, and infertility, but there is little consens…

RESEARCH QUESTION: Is there a difference in recurrence rate of endometrioma(s) after cystectomy versus CO2 laser vaporization of the cyst wall? DESIGN: This single-centre retrospective study included 270 patients undergoing laparoscopic su…

The pelviperineal organs of the female reproductive tract form an essential cornerstone of human procreation. The system comprises the ectodermal external genitalia, the Müllerian upper-vaginal, cervical, endometrial and oviductal derivativ…

BACKGROUND: Possible transtubal spillage of malignant cells is a major concern in fluid instillation sonography, as it is in hysteroscopy. This study aims to compare the transtubal flow of gel and saline and validate the clinical hypothesis…

There are many diagnostic methods to assist clinicians in assessing adnexal masses on ultrasound. After suggesting a standardized terminology and measurement technique to evaluate adnexal masses, the International Ovarian Tumor Analysis (IO…

Endometrial disorders represent a major gynaecological burden. Current research models fail to recapitulate the nature and heterogeneity of these diseases, thereby hampering scientific and clinical progress. Here we developed long-term expa…

The endometrium, which is of crucial importance for reproduction, undergoes dynamic cyclic tissue remodeling. Knowledge of its molecular and cellular regulation is poor, primarily owing to a lack of study models. Here, we have established a…

OBJECTIVE: To compare ultrasonographic features of uterine lesions with the findings at macroscopy and microscopy. METHODS: Case series of ten consecutive women undergoing a hysterectomy for uterine pathology. A preoperative transvaginal u…

STUDY QUESTION: Do sonographic characteristics of ovarian endometriomas vary with age in premenopausal women? SUMMARY ANSWER: With increasing age, multilocular cysts and cysts with papillations and other solid components become more common…

The use of in vitro three-dimensional ultrasound examination with needle stereotaxis after hysterectomy is illustrated in a case of extensive adenomyosis. The quality of the images at in vitro ultrasonography was compared with the quality o…

We will describe a case of a patient diagnosed with a rare identity of a benign lesion, "reactive nodular fibrous pseudotumor" (RNFP). It is a tumor which preoperatively can present as a malignant tumor and is only reported in 19 cases. Acc…

Characterizing ovarian masses enables patients with malignancy to be appropriately triaged for treatment by subspecialist gynecological oncologists, which has been shown to optimize care and improve survival. Furthermore, correctly classify…

Due to the confounding or unknown presence of endometriosis in both cases and controls, it is difficult to test the hypothesis that adenomyosis causes infertility. Based on the limited available evidence, there is evidence to support a caus…

BACKGROUND: To translate the concept of full-conditioning (FC) from animal experiments to the human, and to evaluate the efficacy for adhesion prevention. FC consisted of decreasing acute inflammation by 86% CO2+ 10% N2O + 4% O2 for the pne…

AIM: To evaluate the performance of subjective evaluation of ultrasound findings (pattern recognition) to discriminate endometriomas from other types of adnexal masses and to compare the demographic and ultrasound characteristics of the tru…

OBJECTIVE: To determine the prevalence of histologically proven endometriosis in a subset of infertile women. DESIGN: Retrospective case series with electronic file search and multivariable logistic regression analysis. SETTING: Tertiary …

Endometriosis is defined by the presence of endometrial tissue outside the uterus. Clinical and basic research in endometriosis has been hampered severely by the lack of accurate noninvasive diagnostic techniques. Transvaginal ultrasonograp…

This review discusses uterine adenomyosis as a (co-)factor in female subfertility. The clinical presentation of adenomyosis uteri is reviewed as well as recent developments in non-invasive imaging modalities for the condition. Different tre…