Directory of Nasu-Hakola Disease Resources

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PLOSL is an adult-onset recessively inherited disorder of bones and central nervous system leading to early dementia and death. Recent studies have shown that the genetic basis of PLOSL is mutation(s) in the gene encoding a tyrosine kinase-binding protein TYROBP. Onset of clinical disease occurs in the third decade of life with pain and swelling following strain of the wrist and ankle. Fractures may occur after minor accidents. Neuropsychiatric symptoms begin after age of 30 years presenting progressive dementia with an accentuated prefrontal syndrome, signs of upper motor neuron involvement, agnostic-aparactic-aphasic symptoms, myoclonic jerks and epileptic seizures. Death occurs before the age 50.

Resources in This Category

• CNS Manifestations of Nasu-Hakola Disease: A Frontal Dementia with Bone Cysts

  http://www.neurology.org/content/56/11/1552.abstract
  Abstract of paper by Paloneva et al.

• Online Mendelian Inheritance in Man

  http://omim.org/entry/221770
  Population genetics, references, and symptoms of polycystic lipomembranous osteodysplasia with sclerosing leukoencephalopathy, also known as Nasu-Hakola disease, and as presenile dementia with bone cysts.

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