case_images: PMC11832257_01
case_images: (a) Initial pelvic radiograph taken in the emergency room. (b) Second pelvic radiograph taken in the radiology department; red arrow showing the calcifications.
case_images: CRIOR2025-1491509.001.jpg
case_images: PMC11832257_01_CRIOR2025-1491509.001.jpg
case_images: fig1
case_images: Pelvic radiograph taken in the emergency room did not show any significant findings initially (Figure 1(a)). Then, a subsequent pelvic radiograph revealed calcifications in the psoas muscle (Figure 1(b)).
case_images: Mass originating from left psoas muscle. The red arrow showing the inferior border of the mass, asterisk showing the intersecting femoral nerve (axial T1-weighted MRI).
case_images: CRIOR2025-1491509.002.jpg
case_images: PMC11832257_01_CRIOR2025-1491509.002.jpg
case_images: fig2
case_images: In the T2-weighted series, the mass was hyperintense, lobulated contoured, sharp-edged, markedly enhanced in postcontrast series, and with the dimensions of 72 x 45 x 50 mm (Figures 2, 3, 4, and 5).
case_images: The red arrow showing lobulations and calcifications within the mass, asterisk showing the junction of tumor and psoas muscle (axial T2-weighted MRI).
case_images: CRIOR2025-1491509.003.jpg
case_images: PMC11832257_01_CRIOR2025-1491509.003.jpg
case_images: fig3
case_images: In the T2-weighted series, the mass was hyperintense, lobulated contoured, sharp-edged, markedly enhanced in postcontrast series, and with the dimensions of 72 x 45 x 50 mm (Figures 2, 3, 4, and 5).
case_images: Mass lesion in the psoas muscle (red arrow) in which the upper border is seen as the third lumbar (L3) vertebra (coronal T1-weighted MRI).
case_images: CRIOR2025-1491509.004.jpg
case_images: PMC11832257_01_CRIOR2025-1491509.004.jpg
case_images: fig4
case_images: In the T2-weighted series, the mass was hyperintense, lobulated contoured, sharp-edged, markedly enhanced in postcontrast series, and with the dimensions of 72 x 45 x 50 mm (Figures 2, 3, 4, and 5).
case_images: The red arrow showing the course of the femoral nerve intersecting the inferior border of the tumor. L3: third lumbar vertebra (coronal T2-weighted MRI).
case_images: CRIOR2025-1491509.005.jpg
case_images: PMC11832257_01_CRIOR2025-1491509.005.jpg
case_images: fig5
case_images: In the T2-weighted series, the mass was hyperintense, lobulated contoured, sharp-edged, markedly enhanced in postcontrast series, and with the dimensions of 72 x 45 x 50 mm (Figures 2, 3, 4, and 5).
case_images: The adjacent ureter (arrow) was protected with the help of a tape.
case_images: CRIOR2025-1491509.006.jpg
case_images: PMC11832257_01_CRIOR2025-1491509.006.jpg
case_images: fig6
case_images: The ureter was observed adjacent to the left psoas muscle, and it was protected with the help of a tape (Figure 6).
case_images: Mass originating from the left psoas muscle (arrow), pointed with the hemostat clamp.
case_images: CRIOR2025-1491509.007.jpg
case_images: PMC11832257_01_CRIOR2025-1491509.007.jpg
case_images: fig7
case_images: A mass approximately 8 cm in size was observed on the psoas muscle (Figure 7).
case_images: An approximately 8-cm mass was excised.
case_images: CRIOR2025-1491509.008.jpg
case_images: PMC11832257_01_CRIOR2025-1491509.008.jpg
case_images: fig8
case_images: It was excised from the psoas muscle "en bloc" by sharp and blunt dissection (Figure 8).