Aunt Mickey (They Look the Same until You Undress Them). Nerve Sheath Tumor or Something Else?

Aunt Mickeys are alternative diagnoses for “Aunt Minnies”. They represent less common diagnoses, and emphasize the importance of clinical history and careful imaging review.

Dumbell spinal mass: Nerve sheath tumor or something completely different?

A  “dumbell” spinal mass was discovered during CT angiographic evaluation of an aortic aneurysm in this 66-year-old female. She had experienced constant but stable low back pain. There were no neurologic deficits.

NECT at T11-12
Non-contrast axial CT at T11-12
CECT at T11-12
Contrast-enhanced axial CT image at T11-12
Axial T2 weighted image at T11-12
Axial T2 weighted image at T11-12
Axial T1 weighted image at T11-12
Axial T1 weighted image at T11-12
Axial enhanced T1 weighted image at T11-12
Axial enhanced T1 weighted image at T11-12

The lesion was biopsied under CT guidance. At pathology, the lesion was composed of closely apposed small to medium sized blood vessels (some of which contained organizing thrombus) without intervening stroma. The vessels were admixed with fibroadipose tissue. The pathological diagnosis was “hemangioma” (a misnomer, as these lesions represent venous vascular malformations, not true hemangiomas). More detailed review of the imaging study revealed several findings that might have suggested this pathologic possibility.

Axial NECT demonstrates a tiny phlebolith (arrow).
Axial NECT demonstrates a tiny phlebolith (arrow).
Bone window demonstrates honeycomb changes and thickened trabeulae (arrow).
Bone window demonstrates honeycomb changes and thickened trabeulae (arrow) in the right transverse process.
Aunt Mickey (They Look the Same until You Undress Them). Nerve Sheath Tumor or Something Else?
Joel Cure
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