The clinical and biochemical spectrum of patients with mevalonic aciduria is heterogeneous. Manifestations of the disease seem to be age dependent, as evident from this first report of adolescent patients. In patients who survive infancy, short stature, ataxia caused by cerebellar atrophy, and ocular involvement with retinal dystrophy become predominant findings. Recurrent febrile crises seem to diminish with increasing age and may not even be an obligatory finding. Elevation of IgD is most likely a secondary phenomenon that seems to be linked to recurrent febrile crises.
Using the retinal function imaging technology revealed significantly lower retinal blood flow velocities in the small and large retinal vessels in patients with retinitis pigmentosa than in healthy subjects. This corresponds with the known decrease in the retinal vessel diameters as observed upon ophthalmoscopy in patients with retinitis pigmentosa. Retinal function imaging technology may hold promise for measurements of retinal blood flow parameters.
With the Heidelberg software, automated static threshold perimetry using the SLO is possible within reasonably short examination times. The mean time interval between two test point presentations is about one tenth of that necessary using the original Rodenstock software. There is a systematic difference between SLO and Octopus fields of about 4 dB which was not very much influenced by the stimulus locations.
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