Abstract
Epidural spinal myelolipoma was diagnosed in an 11.5-year-old castrated male Husky-cross that was evaluated at the veterinary teaching hospital due to progressive thoracolumbar spinal hyperaesthesia and mild proprioceptive pelvic limb ataxia. A focal, ill-defined mildly inhomogenous extradural mass lesion was detected by MRI. The dog was euthanized. At necropsy an extradurally located reddish mass of about 2.5 cm in diameter was present in the vertebral canal. The mass was identified histopathologically as an epidural myelolipoma.
Highlights
Myelolipomas are benign tumors consisting of mature fat interspersed with haematopoietic elements resembling bone marrow
The present report describes the third case of epidural spinal myelolipoma in a male sled dog
Because of the hyperintensity in T1- and T2- weighted images compared to spinal cord parenchyma and the hypointensity in SPAIR, the lesion was suspected to be primarily composed of fat tissue
Summary
Myelolipomas are benign tumors consisting of mature fat interspersed with haematopoietic elements resembling bone marrow. The present report describes the third case of epidural spinal myelolipoma in a male sled dog. T2-weighted sagittal MR images showed a heterogenous epidural mass, hyperintense compared to spinal cord parenchyma, but hypointense compared to CSF/epidural fat signal. The T1-weighted transverse MR images (without contrast) revealed an extradural left sided lesion compressing the spinal cord to the right side (Figure 2a) There was no enhancement after administration of Gadolinium based paramagnetic contrast medium (Figure 2b).
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