A 65-Year-Old Lady Visits the Clinic Because Her Legs Have

A 65-year-old lady visits the clinic because her legs have been becoming weaker over the past five months. Upon examination, the lower extremities exhibit increased muscular tone, quick deep tendon reflexes, and reduced muscle strength. Both legs have a positive Babinski sign. Upper body parts are typical. According to the exhibit, an MRI of the spine shows a 2-cm-diameter spherical lesion that is extramedullary and compresses the spinal cord at the T12 level. The lesion is encircled by cerebrospinal fluid. Which of the following is the most likely cell of origin of the lesion?

A) Ependymal cells
B) Meningothelial cells
C) Metastatic tumor cells
D) Osteoblasts
E) Vascular endothelial cells

Correct Answer:

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