[Fabry's disease with malocclusion and acromegalic-appearance: clinical and electromicroscopic studies (author's transl)].

The present case is a 24-years-old man who complained painful attack with numbness in both bilateral shoulder regions and distal extremities. This pain was increased by the stimulations of sunlight and heat. On physical examinations, he had an acromegalic-like-appearance, thick mustache and beard. Malocclusion of the teeth which showed the broad space was found. And skin lesion was not found out. Hypesthesia in bilateral distal extremities was revealed and no other abnormal neurological findings were observed. He was made diagnosis of Fabry's disease by laboratory examinations which were alpha-galactosidase deficiency analysed in leukocytes, increased ceramide trihexosides demonstrated in urinary sediment and electron microscopic findings in the biopsy of the skin and sural nerve. His mother had and decreased alpha-galactosidase activity which levels showed between normal and patient and was speculated to be a carrier. On an electron microscopy, "Zebra body" was observed in fibroblasts, capillary endothelial cells, their pericytes, prineural and Schwann cells. Many of them had a distinct limiting membrane and laminal structure with irregular alterations of light and dark zone. In the cytoplasma of Schwann cells, there were many rough endoplasmic reticulums which were located parallel with alignment and seemed to show the loosed laminal structure with the unclear limited membrane. Occasionally, fusions between irregular laminal structure and rough endoplasmic reticulum were also observed. These findings could be indicated that the formation of Zebra body is related to rough endoplasmic reticulum, because laminal structure which described above is corresponded to pre-Zebra body. In the cytoplasma of the prineural cells, recket-like structure which was seen in histiocytosis X were occasionally observed.