A 41-year-old man was diagnosed as having primary parotid carcinoma on the right side. After radical parotidectomy, radiation therapy and systemic chemotherapy, the primary parotid carcinoma was completely remitted. Two years later, right abducens nerve palsy and Horner syndrome appeared. Neuroimaging demonstrated a gadolinium-enhanced lesion in the posterior portion of the right cavernous sinus, and metastasis of parotid carcinoma was suspected. After radiosurgery and systemic chemotherapy, the intracavernous lesion disappeared. This is the first case of combination of abducens nerve palsy and ipsilateral Horner syndrome due to metastasis from parotid carcinoma to the cavernous sinus.

The aggregation of a surfactant metal complex, dichlorobis(N-hexylethylenediamine)zinc(II) (= [ZnCl2(hex-en)2]), was studied in such solvents as water, methanol (or water–methanol mixed), and chloroform (or water-containing chloroform). This complex was readily dissolved in water to form aggregates extensively, and was also very soluble in water-containing chloroform to give reversed-type aggregates. In dilute aqueous solutions, the complex was hydrolyzed and precipitated, while the solution was stable at concentrations above 0.25 mol kg-1 where the complex aggregates considerably. Precipitation was prevented by the addition of NaCl; this effect can be attributed to chloride-ion binding. The aggregation behavior in solutions was investigated by measuring the self-diffusion coefficients for the complex and of the vapor pressure depressions. The degrees of aggregation of the aqueous and water-containing chloroform solutions were in a similar manner at higher concentrations, although the critical concentration for aggregation in the aqueous solution was considerably smaller than in the chloroform solution. The hydration mode of this surfactant complex is discussed in comparison to the D2O longitudinal relaxations between the aqueous solutions and the water-containing chloroform solutions.

We report a 23-year-old man with suprasellar germinoma accompanied by optic tract syndrome, Horner's syndrome, and trochlear nerve palsy. Neuroimaging demonstrated that the optic tract, the hypothalamus on the left side, and the trochlear nerve in the subarachnoid space were involved by a germinoma. In addition to neuroimaging findings, detailed observation of various ocular symptoms was highly useful for determining the localization of the germinoma.

We evaluated the cause in each type of 180 Japanese internuclear ophthalmoplegia (INO) from the clinical registry. Bilateral INO was seen in 14 of 33 patients with stroke and 12 of 33 with multiple sclerosis. Unilateral INO was observed in 108 of 147 patients with stroke, 15 of 147 with MS. One-and-a-half syndrome was detected in 19 of 22 patients with stroke and 3 in MS. Low prevalence rate of MS mainly reflect the much lower incidents in Japan and may be due to the difference between conventional form of MS in Western communities and optic-spinal form of MS in Japan.