![]() These types of cysts are usually uncommon. But, in rare cases, some corpus luteum cysts can split or rupture causing sudden pain and internal bleeding. These types of cysts are generally found on only one side, do not trigger any symptoms and disappear within few months. Sometimes, the fluid gets accumulated inside the follicle, causing the corpus luteum to grow into a cyst. This follicle is now known as corpus luteum or luteal ovarian. When an egg is released from the follicle, the follicle begins to produce the female sex hormones estrogen and progesterone for conception. ![]() However, these types of cysts require no treatment and usually go away within a few weeks. So, if the follicle doesn’t shed the fluid and shrink after releasing the egg cell or doesn’t release the egg cell, it can swell and develops into a follicular ovarian cyst. When the egg cell gets released, the follicle bursts. Every month when an egg is released from the ovaries, it’s cell is first formed in the follicle that contains a fluid which protects the growing egg. © RSNA, 2019.This kind of cysts usually develop as a result of a failed step in a woman’s reproductive cycle. Large size, persistence, and separability from the ovary were most helpful for identification of nonphysiologic paratubal cysts. Conclusion No malignancies were encountered in the study population and the majority of cysts resolved at follow-up imaging. Of 409 patients, no malignancies were encountered in this study population with surgical or imaging resolution. Of the 159 cysts, 100 (62.8%) were defined in the pathologic report as paratubal cysts. One-hundred fifty-nine patients underwent surgical intervention (mean cyst size, 8.5 cm ± 5.3), and 69.8% (111 of 159) of the cysts had simple characteristics. In the patients with complete imaging follow-up, mean time to US documentation of resolution was 194 days ± 321 59.6% (149 of 250) patients had nonsimple cyst characteristics. Results Of 754 patients who met inclusion criteria (age, 8-18 years mean age, 14.6 years ± 1.9 mean cyst size, 5 cm ± 3.3), 409 patients underwent complete follow-up that included resolution at imaging ( n = 250) or surgery ( n = 159). Statistical analysis was performed with the Wilcoxon rank sum and Kruskal-Wallis tests for continuous variables and the Fisher exact test for categorical variables. Initial and follow-up dates of US, cyst size and complexity, imaging diagnosis, and change on subsequent US images were recorded. Demographic characteristics, date of surgery, surgical notes, and pathologic reports were extracted from the electronic medical record. Patients older than 7 years and younger than 18 years with ovarian or adnexal cysts at least 2.5 cm were included. Materials and Methods Female patients who underwent pelvic US with or without Doppler from January 2009 through December 2013 were identified by using a centralized imaging database. ![]() Purpose To identify characteristics at US that help to distinguish physiologic ovarian cysts from nonphysiologic entities. Background Ovarian and adnexal cysts are frequently encountered at US examinations performed in preadolescent and adolescent patients, yet there are few published studies regarding the outcomes of cysts in this population.
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