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Click Computed Tomography of a 31-year-old female with retroperitoneal giant cystic leiomyoma. Axial CT of the abdomen (GE LightSpeed, 16-Slice Scanner; 370 mAs, 120 kVP, 10 millimeter (mm) slices, no contrast). Axial images showing a huge cystic mass occupying the entire pelvis that extends up to the upper abdomen, displacing the rectum laterally and surrounding the uterus.

Click Magnetic resonance imaging of a 31-year-old female with retroperitoneal giant cystic leiomyoma. T1-weighted Sagittal MRI of the abdomen (GE SIGNA, 1.5Tesla MR scanner; Fasto Spin Echo (FSE) sequence, TR=4017, TE=103, 10 mm slices). Sagittal images showing a well-defined cystic mass. It is hypointense, but it is hyperintense relative to the urinary bladder.

Click Magnetic resonance imaging of a 31-year-old female with retroperitoneal giant cystic leiomyoma. T1-weighted Axial MRI of the abdomen (GE SIGNA, 1.5Tesla MR scanner; FSE sequence, TR=4017, TE=103, 11 mm slices). Axial images showing a cystic mass that occupied almost the entire pelvic space. It is hypointense, but it is hyperintense relative to the urinary bladder.

Click Magnetic resonance imaging of a 31-year-old female with retroperitoneal giant cystic leiomyoma. T2-weighted Sagittal MRI of the abdomen (GE SIGNA, 1.5Tesla MR scanner, FSE sequence, TR=4017, TE=103, 10 mm slices). Sagittal images showing a heterogeneously hyperintense cystic mass that is isointense relative to muscle. A normal-sized uterine body is visible in the middle of the pelvis.

Click Magnetic resonance imaging of a 31-year-old female with retroperitoneal giant cystic leiomyoma. T2-weighted Axial MRI of the abdomen (GE SIGNA, 1.5Tesla MR scanner; FSE sequence, TR=4017, TE=103, 11 mm slices). Axial images showing a cystic mass that occupied almost the entire pelvic space. A normal-sized uterus is shown in the middle of the pelvis.

Click Magnetic resonance imaging of a 31-year-old female with retroperitoneal giant cystic leiomyoma. Sagittal contrast enhanced fat saturated T1-weighted MRI of the abdomen (GE SIGNA, 1.5Tesla MR scanner; FSE sequence, TR=4017, TE=103, with 10ml gadopentetate dimeglumine (Magnevist, Bayer Pharma, Japan) injection, 10 mm slices). A huge mass is occupying the entire pelvis that extends up to the upper abdomen. The mass has an enhanced rim and some soft-tissue components.

Click Magnetic resonance imaging of a 31-year-old female with retroperitoneal giant cystic leiomyoma. Axial contrast enhanced fat saturated T1-weighted MRI of the abdomen (GE SIGNA, 1.5Tesla MR scanner; FSE sequence, TR=4017, TE=103, with 10ml gadopentetate dimeglumine (Magnevist, Bayer Pharma, Japan) injection, 11 mm slices). A huge mass is occupying the entire pelvis that extends up to the upper abdomen. The mass has an enhanced rim and some soft-tissue components.

Click Magnetic resonance imaging of a 31-year-old female with retroperitoneal giant cystic leiomyoma. Coronal contrast enhanced fat saturated T1-weighted MRI of the abdomen (GE SIGNA, 1.5Tesla MR scanner; FSE sequence, TR=4017, TE=103, with 10ml gadopentetate dimeglumine (Magnevist, Bayer Pharma, Japan) injection, 8 mm slices). Coronal images showing a huge cystic mass occupying the entire pelvis that extends up to the upper abdomen. The mass has an enhanced rim and some soft-tissue components.

Click Magnetic resonance imaging of a 31-year-old female with retroperitoneal giant cystic leiomyoma. Axial diffusion weighted MRI of the abdomen (GE SIGNA 1.5Tesla MR scanner, FSE sequence, TR=4017, TE=103, 11 mm slices). Axial diffusion weighted MRI showing a large hyperintense tumor.