hereditary spastic paraplegia

Hereditary spastic paraplegia (HSP) refers to a heterogeneous group of neurodegenerative conditions characterized by progressive degeneration of the corticospinal tracts and posterior column of the spinal cord.

Clinical presentation

Patients often tend to have progressive lower extremity weakness and spasticity.

Pathology

Genetics

Most carry an autosomal recessive inheritance.

Subtypes
  • Troyer syndrome 

Radiographic features

MRI

Often non-specific and variable but can include:

  • corpus callosum atrophy
  • increased T2 signal intensity in the posterior limb of the internal capsule
  • spinal cord atrophy
  • ears of the lynx sign: high T2/FLAIR signal intensity at the tips of the frontal horns of the lateral ventricles
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