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case_images: Clinical photogram showed a mass similar to a lower limb-like structure in the back of the girl.
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case_images: Upon physical examination, the mass exhibited a firm, smooth texture and was non-painful, displaying a lower limb-like structure (Figure 1).
case_images: (a-c) Axial, coronal and sagittal 3D CT images showed a mass (green arrow) with bony structure (orange arrow). (d) Axial bone reconstruction shows dorso-lumbar spinal dysraphism communicating with the mass (yellow arrow).
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case_images: Computed tomography (CT) revealed a complex mass with a bony structure reminiscent of a hip bone and femur (Figure 2a, b, and c). Additionally, examination unveiled a spinal dorsolumbar dysraphism in the host, along with continuous adipose tissue within the epidural space connected to the mass (Figure 2d).
case_images: (a-c) Axial and sagittal T2WI (with and without fat suppression) show that both share the same column with a spinal defect of the posterior elements from T12 to L5 onward, with nerve roots involvement compatible (orange arrows) with a myelomeningocele. Conus medullaris (green arrow).
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case_images: This configuration resulted in a myelomeningocele with a tethered cord, with the conus medullaris terminating at the level of the fourth lumbar vertebra (see Figure 3).
case_images: (a and b) Sagittal T1WI and T2WI-FS show thickened filum terminale with filar lipoma dragged posterior in the sacral canal (orange arrows).
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case_images: The filum terminale displayed thickening due to a filar lipoma and had been displaced into the sacral canal (Figure 4).
case_images: Coronal and axial T2WI (with and without fat suppression) showed mass with bony structure resembling hip bone, the femur, the tibia, the fibula and a phalanx (a-c) and with cystic lesions (d) soft tissue components similar to skeletal muscle around joints and abundant percutaneous adipose tissue (e). Right kidney agenesis (f).
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case_images: Furthermore, MRI imaging showcased the mass's bone structure resembling that of a hip bone, femur, tibia, fibula, and phalanx (Figure 5a, b, and c), in addition to cystic lesions. Soft tissue components reminiscent of skeletal muscle were observed around joints, alongside bones and abundant subcutaneous adipose tissue (Figures 5d and e). Notably, associated right kidney agenesis was also apparent (Figure 5f).