On MRI scan, calcification is shown as low signal intensity and there were
some report of low signal intensities in Wilson disease. Most of all her
clinical findings and age is very suggestive.
If there were real calcification, listed disease can cause that.
idiopathic (no endocrine abnormality)
Fahr disease (familial cerebrovascular ferrocalcinosis)
postinflammatory (tuberculosis, toxoplasmosis, cysticercosis, congenical
Congenital (tuberous sclerosis, Down syndrome, MELAS/MERRF, Cockayne
syndrome, neurofibromatosis, methemoglobinopathy)
Post-anoxic/toxic (CO poisoning, chemotherapy and radiation therapy, lead