case_images: PMC9899128_01
case_images: Cross-sectional view of retroperitoneal hematoma.
case_images: cureus-0015-00000033414-i01.jpg
case_images: PMC9899128_01_cureus-0015-00000033414-i01.jpg
case_images: FIG1
case_images: Biopsies of these masses were negative for malignancy.  Due to concern of active bleeding and extravasation, a CT angiogram of the abdomen and pelvis revealed a left psoas retroperitoneal hematoma with no active extravasation (Figures 1-3).
case_images: Sagittal view of retroperitoneal hematoma.
case_images: cureus-0015-00000033414-i02.jpg
case_images: PMC9899128_01_cureus-0015-00000033414-i02.jpg
case_images: FIG2
case_images: Biopsies of these masses were negative for malignancy.  Due to concern of active bleeding and extravasation, a CT angiogram of the abdomen and pelvis revealed a left psoas retroperitoneal hematoma with no active extravasation (Figures 1-3).
case_images: Coronal view of retroperitoneal hematoma.
case_images: cureus-0015-00000033414-i03.jpg
case_images: PMC9899128_01_cureus-0015-00000033414-i03.jpg
case_images: FIG3
case_images: Biopsies of these masses were negative for malignancy.  Due to concern of active bleeding and extravasation, a CT angiogram of the abdomen and pelvis revealed a left psoas retroperitoneal hematoma with no active extravasation (Figures 1-3).