Journal of Korean Society of Ultrasound in Medicine 2006;25(3): 127-132.
Corpus Luteum Cyst Rupture - US Findings and Clinical Features.
Shang Hun Shin, Jong Hwa Lee, Byeong Seong Kang, Myeon Jun Yang, Young Hwan Kim, Jae Hung Lee, Yoong Ki Jeong
1Department of Diagnostic Radiology, Ulsan University Hospital, Korea. shin@uuh.ulsan.kr
2Department of Diagnostic Radiology, Dongsan Medical Center, Keimyung University College of Medicine, Korea.
3Department of Diagnostic Radiology, Dong Kang General Hospital, Korea.
  Published online: September 1, 2006.
ABSTRACT
PURPOSE: To describe the US findings of corpus luteum cyst rupture in order to elucidate the associated clinical features. MATERIALS AND METHODS: Twenty patients with proven corpus luteum cyst rupture were included in this study. The US findings of these patients were retrospectively analyzed in terms of the presence of designable cyst, size of the cyst, thickness and blood flow of the cyst wall, extension and echogenicity of peritoneal fluid, and involved site (right or left ovary). We also surveyed the clinical features such as the onset period according to the menstrual cycle, and the presence of suspectable cause. RESULTS: Fourteen of the 20 patients revealed designable cysts (mean diameter of 2.6 cm) with thick walled cysts (mean thickness, 4.6 mm, 2.4 -6.8 mm) and increased blood flow. Six patients didn 't reveal any cyst but only hematoma in adnexa. All patients had hemoperitoneum in the pelvic cavity, and the hemoperitoneum was extended to Morrison's pouch in 8 patients and to the subphrenic space in 6. The cysts occurred in the right adnexa in 15 patients and in the left in 5. Mean interval from the last menstrual period (LMP) was 26 days (13-44 days) and 6 of the 8 patients for whom it had been possible to obtain detailed history taking had had coitus just before the occurrence of symptom. CONCLUSION: When women who are hospitalized for acute abdomen and who are in luteal phase reveal US findings of hematoma or thick-walled cyst in adnexa and hemoperitoneum, a corpus luteum cyst rupture is highly suspected. In our case study the corpus luteum cyst rupture predominantly occurred in the right side, and the most suspectable cause was trauma such as coitus in the luteal phase.
Keywords: Ovary, cysts; Ovary, US
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