Time filter

Source Type

Edogawa-ku, Japan

Takahashi H.,Asahikawa Medical College | Nakajima S.,Moriyama Memorial Hospital | Ogasawara K.,Sarufutsu Hokuho Hospital | Asano R.,Photochemcal Co. | And 3 more authors.
Journal of Dermatology | Year: 2014

Photodynamic therapy (PDT) is useful for superficial skin tumors such as actinic keratosis and Bowen disease. Although PDT is non-surgical and easily-performed treatment modality, irradiation apparatus is large and expensive. Using 7, 12-dimethylbenz[a]anthracene (DMBA) and 12-ο- tetradecanoylphorbol-13-acetate (TPA)-induced mouse skin papilloma model, we compared the efficacy of TONS501- and ALA-PDT with a LED lamp, a diode laser lamp or a metal-halide lamp on the skin tumor regression. TONS501-PDT using 660 nm LED lamp showed anti-tumor effect at 1 day following the irradiation and the maximal anti-tumor effect was observed at 3 days following the irradiation. There was no significant difference in the anti-tumor effects among TONS501-PDT using LED, TONS501-PDT using diode laser, and 5-aminolevulinic acid hydrochloride (ALA)-PDT using metal-halide lamp. Potent anti-tumor effect on DMBA- and TPA-induced mouse skin papilloma was observed by TONS501-PDT using 660 nm LED, which might be more useful for clinical applications. © 2014 Japanese Dermatological Association.

Takahashi H.,Asahikawa University | Nakajima S.,Moriyama Memorial Hospital | Sakata I.,Photochemical | Iizuka H.,Asahikawa University
Journal of Dermatology | Year: 2014

Numerous reports indicate therapeutic efficacy of photodynamic therapy (PDT) against skin tumors, acne and for skin rejuvenation. However, few reports exist regarding its efficacy for fungal skin diseases. In order to determine the antifungal effect, PDT was applied on Malassezia furfur. M. furfur was cultured in the presence of a novel cationic photosensitizer, TONS504, and was irradiated with a 670-nm diode laser. TONS504-PDT showed a significant antifungal effect against M. furfur. The effect was irradiation dose- and TONS504 concentration-dependent and the maximal effect was observed at 100 J/cm2 and 1 μg/mL, respectively. In conclusion, TONS504-PDT showed antifungal effect against M. furfur in vitro, and may be a new therapeutic modality for M. furfur-related skin disorders. © 2014 Japanese Dermatological Association.

Ishida A.,Moriyama Memorial Hospital | Shibuya M.,Tokyo Medical University | Komori T.,Tokyo Metropolitan Institute for Neuroscience | Nobusawa S.,Gunma University | And 3 more authors.
Brain Tumor Pathology | Year: 2013

Papillary tumor of the pineal region (PTPR) is a recently described neoplasm. Several studies have been published on this tumor, but its pathological features and the appropriate treatment remain unclear. PTPR is reported to originate from ependymal cells in the subcommissural organ. Isocitrate dehydrogenase 1 and 2 (IDH1/2) mutations have been a focus area in glioma research as promising predictors. We report a case of PTPR that was characterized by local recurrence, although subtotal removal and radiotherapy seemed effective for many months. Histological examination showed ependymal features in the surgical specimens. As far as we are aware, this case study is the first to show that the IDH1/2 genotypes in PTPR cells are wild-type genotypes, which is consistent with the negative immunoreactivity that was observed for the IDH1 mutant antibody in this study. © 2012 The Japan Society of Brain Tumor Pathology.

Asakuno K.,Moriyama Memorial Hospital | Ishida A.,Moriyama Memorial Hospital
Surgical Neurology International | Year: 2014

Background: Cortical deafness is a rare symptom that is associated with bilateral lesions of the auditory cortex. To date, cortical deafness has been reported in only three cases of subarachnoid hemorrhage (SAH). Copyright:Case Description: This 55-year-old female was admitted to our hospital with SAH caused by a ruptured left internal carotid artery (ICA) paraclinoid aneurysm. Computed tomography (CT) scans showed diffuse thick SAH with no other lesions such as an old infarction or hemorrhage. Emergent stent-assisted coil embolization was performed successfully and subsequent cisternal irrigation with urokinase almost completely washed out the thick SAH. During follow-up, she was alert and without any neurological deficits, however, she developed acute bilateral deafness on day 7 even though she had no history of hearing impairment. Because of the deafness, verbal communication was difficult. She became almost completely unable to hear and communication was confined to writing. Immediate diffusion-weighted (DW) image showed high intensities in bilateral superior temporal gyri due to severe vasospasm of bilateral middle cerebral arteries (MCAs). Immediate angiography showed severe vasospasm especially right MCA. A microcatheter was advanced to the right M1 and papaverine was administered. Soon after that, her hearing impairment dramatically improved. Our simple audiometry showed a hearing threshold average for both 1000 and 4000 Hz at 25 dB in both ears. She was discharged without any deficits in 2 weeks.Conclusions: To our knowledge, this is the first reported case of pure cortical deafness due to bilateral vasospasm, which was immediately resolved by intraarterial administration of papaverine. © 2014 Asakuno K.

Ishida A.,Moriyama Memorial Hospital | Matsuo S.,Moriyama Memorial Hospital | Kawamura S.,Tokyo Womens Medical University | Nishikawa T.,Tokyo Womens Medical University
Surgical Neurology International | Year: 2014

Background: The incidence of subarachnoid hemorrhage (SAH) in young adults is relatively rare. Kawasaki disease is a systemic vasculopathy that is known to cause coronary artery aneurysms; however, its effect on cerebral arteries remains largely unclear. Case Description: We report the case of a 20-year-old male with a history of Kawasaki disease who presented with SAH caused by the rupture of a nonbranching middle cerebral artery aneurysm. This is the third report of SAH associated with Kawasaki disease. Preoperative echocardiography of the patient rejected the presence of bacterial endocarditis and other heart abnormalities. An emergency craniotomy and clip occlusion of the aneurysm was successfully performed without obstructing the parent artery. Two weeks later, the patient was discharged without any apparent neurological deficit. We also performed a circumstantial pathological study on specimens obtained from the aneurysm wall. Our histological findings suggest that the elastic lamina and tunica intima were completely destroyed during the acute vasculitis phase of Kawasaki disease, which possibly led to the aneurysmal formation. Conclusions: Lack of active inflammatory changes and atherosclerotic lesions may explain the chronic feature of Kawasaki disease, not a typical aneurysmal formation. Copyright:© 2014 Ishida A.

Discover hidden collaborations