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Pick's disease is a rare cause of dementia. We studied two clinical cases of Pick's disease in its early stage. A computed tomography (CT) demonstrated lobar atrophy affecting primarily the anterior portions of the frontal lobes and the inferior portions of the temporal lobes. The fact that the characteristic pattern of lobar atrophy is already apparent in the early stage of the disease was demonstrated.

A 51-year-old male has suffered the gradual onset of difficulty with memory, concentration and cognition at age 50. He has progressively developed severe dementia accompanied by muscle wasting and fasciculation prominent in the upper arms and shoulders and the bulbar muscles. EMG and muscle biopsy revealed denervation patterns and a CT-scan showed moderate cerebral atrophy. Cases of presenile dementia with motor neuron disease reported in Japan have been reviewed and the possibility of a new clinico-pathologic entity is discussed.

We examined two cases of tuberous sclerosis for the presence of glial fibrillary acidic protein (GFAP) using the immunoperoxidase technique. The majority of abnormal giant cells in the cerebral cortex showed no reaction to anti‐GFAP. Some abnormal cells in the cortical tuber and white matter showed a weak positive reaction. All of the subependymal tumor cells showed no GFAP in their cytoplasm. The abnormal giant cells in tuberous sclerosis,. morphologically similar to gemistocytic astrocyte, are not accompanied by antigenic properties of GFAP.