Faculty Profiles - MATSUZAKI Hidenobu

Papers - MATSUZAKI Hidenobu

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Diagnosis of multiple synchronously occurring cystic jaw lesions in 23 patients: Prognostic implications related to basal cell nevus syndrome

Jun Ichi Asaumi, Jun Murakami, Yoshinobu Yanagi, Miki Hisatomi, Hidenobu Matsuzaki, Yuu Maki, Teruhisa Unetsubo, Yasutoshi Honda, Hironobu Konouchi

Oral Radiology 23 ( 1 ) 16 - 18 2007.6

Publishing type：Research paper (scientific journal)

Objectives. We rarely find multiple cystic lesions in the jaw in panoramic radiographs. Most reports of multiple cystic lesions have described keratocystic odontogenic tumors (KOTs) in patients with basal cell nevus syndrome. In this study, we performed radiographic and clinical examinations of patients with multiple cystic jaw lesions found during their first visit to our department to determine the proportion of basal cell nevus syndrome among multiple cystic lesions. Methods. Patients who had a panoramic radiograph taken at Okayama University Hospital between 1993 and 2000 were examined. Twenty-three patients with multiple cystic jaw lesions on a first panoramic radiography examination were entered into this study. Results. Of the 23 patients, 12 (52.2%) were diagnosed with basal cell nevus syndrome and 11 (47.8%) were not. Of the 14 patients with multiple KOTs, 12 (85.7%) were diagnosed as having basal cell nevus syndrome. Of the nine remaining patients with multiple cystic jaw lesions, only seven had multiple dentigerous cysts and two had multiple simple bone cysts. Cleft palate was observed in four of the 12 patients (33.3%) with basal cell nevus syndrome. Conclusion. Diagnosing basal cell nevus syndrome based on multiple cystic jaw lesions carries a high risk of misdiagnosis. A strong possibility exists that patients with multiple jaw KOTs have basal cell nevus syndrome. Furthermore, cleft palate should be considered an important oral finding in basal cell nevus syndrome because its occurrence was relatively frequent in our study. © 2007 Japanese Society for Oral and Maxillofacial Radiology Springer-Verlag.

DOI： 10.1007/s11282-007-0059-x

Novel cell-surface peptides specific to human oral squamous cell carcinoma using an E-coli peptide display library International journal

Noriko Kawai, Junichi Asaumi, Jun Murakami, Toru Wakasa, Masahiro Kuroda, Miki Hisatomi, Teruhisa Unetsubo, Yuu Maki, Hidenobu Matsuzaki, Yoshinonu Yanagi, Hironobu Konouchi

ONCOLOGY REPORTS 17 ( 4 ) 787 - 791 2007.4

Language：English Publishing type：Research paper (scientific journal) Publisher：SPANDIDOS PUBL LTD

We attempted to find a specific antigen of oral squamous cell carcinoma (SCC) cells that could be safely applied to gene therapy in the conservative clinical treatment of oral cancer. We performed subtraction using normal human keratinocyte cells, followed by selection using four oral SCC cell lines. We isolated three clones from poorly differentiated SCC cells and four from well-differentiated SCC cells. These seven clones adsorbed to the oral SCC cells at rates 10-100 times those of normal human keratinocyte cells. The three clones from the poorly differentiated SCC cells showed the same peptide sequence (LAPRTHP). Of the four clones from the well-differentiated SCC cells, three showed the same peptide sequence (FGTLPGT) and the fourth showed a different one (VTPNSTP). Each peptide sequence may recognize the material that exists specifically on the oral SCC cell cortex. We can expect applications not only for tumor-targeting treatment using a gene therapy virus vector but also for diagnosis using, as a tumor marker, the peculiar SCC surface material that these peptides recognize.

Enhancement effects of test injection with a small amount of MR contrast medium in the oral and maxillofacial region International journal

Yoshinobu Yanagi, Jun-ichi Asaumi, Hironobu Konouchi, Miki Hisatomi, Hidenobu Matsuzaki, Jun Murakami, Yuu Maki, Teruhisa Unetsubo, Kanji Kishi

EUROPEAN JOURNAL OF RADIOLOGY 59 ( 3 ) 367 - 370 2006.9

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER IRELAND LTD

Purpose: To examine whether the signal intensity of dynamic contrast-enhanced MRI (DCE-MRI) is altered by test injection of 1 ml of contrast medium, and if so, whether this change affects the DCE-MRI analysis.Materials and methods: Six healthy volunteers were examined by DCE-MRI using a Magnevist syringe and/or an Omniscan syringe for the injection of contrast medium. Each scan was performed 10 times using steady-state free precession (3D-FISP), a sequence for DCE-MRI, before and after intravenous injection of 1 ml of the contrast medium. The internal pterygoid muscle, masseter muscle, tongue, parotid gland, submandibular gland, bone marrow of the mandible, subcutaneous adipose tissue, and common carotid artery were determined to be regions of interest (ROI), and the ROI internal average signal intensity was measured. The 10 data sets obtained before or after contrast medium administration for each ROI were evaluated using the paired t-test.Results: The test injection increased the signal intensities of six of eight ROIs, with all 20 experiments in the submandibular gland showing significant differences. There was no significant difference in the two ROIs corresponding to the carotid artery and subcutaneous adipose tissue of the cheek.Conclusions: The enhanced signal intensity in the tissue might have been caused by the small amount of contrast medium in the test injection. To eliminate this discrepancy caused by the test injection, a pre-contrast scan should be performed when the average signal intensity of an ROI is measured. We therefore believe that the data obtained before a test injection may be important in the analysis of DCE-MRI. (C) 2006 Elsevier Ireland Ltd. All rights reserved.

DOI： 10.1016/j.ejrad.2006.03.017

Usefulness of contrast enhanced-MRI in the diagnosis of unicystic ameloblastoma International journal

Hironobu Konouchi, Jun-ichi Asaumi, Yoshinobu Yanagi, Miki Hisatomi, Noriko Kawai, Hidenobu Matsuzaki, Kanji Kishi

ORAL ONCOLOGY 42 ( 5 ) 481 - 486 2006.5

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

The radiographic features of unicystic ameloblastoma (UA) are typically unilocular and round area of radiolucency. Therefore, this type of lesion is often misdiagnosed as an odontogenic keratocyst or a dentigerous cyst. UA should be differentiated from odontogenic cysts because the former have a higher rate of recurrence than the latter. In the present study, we performed contrast enhanced-MRI (CE-MRI) to diagnose 13 cases of unilocular, round radiolucent lesions visualized on panoramic radiograph and/or CT. In the cases of UA, low signal intensity was observed on T1-weighted images (WIs), and a markedly high signal intensity was observed on T2-WIs; moreover, relatively thick rim-enhancement with/without small intraluminal nodules was observed upon CE-T1 WIs. CE-MRI was considered useful in the diagnosis of UA, as characteristic features of this type of Lesion i.e., thick enhancement of the tumor wall and small intraluminal nodules were detected only by CE-MRI in the present study. (c) 2005 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.oraloncology.2005.10.001

好酸球肉芽腫の臨床的・X線学的検討

浅海淳一, 畦坪輝寿, 牧優, 村上純, 松崎秀信, 久富美紀, 河井紀子, 柳文修, 此内浩信, 岸幹二

岡山歯学会雑誌 24 ( 2 ) 37 - 41 2005.12

Language：Japanese Publisher：岡山歯学会

病理組織学的に好酸球肉芽腫と診断した4例を対象とした.主訴は4例中2例が腫脹,1例が疼痛,1例がX線撮影時に偶然発見されたものであった.臨床的・X線学的に4例中2例は悪性腫瘍,1例は骨髄炎と診断され,1例は不明であった.最終的には病理組織学的に全例,好酸球肉芽腫と診断した.X線学的には,顎骨内に生じた14病巣はび漫性のX線透過像を示した.処置は8病巣で掻爬あるいは辺縁骨切除などの外科処置,4病巣で放射線照射,3病巣で化学療法,2病巣で外科処置と放射線照射,3病巣で放射線照射と化学療法を行った.いずれの処置に対してもよく反応したが,化学療法に関しては悪性リンパ腫の診断の基に行ったもので,反応は悪かった.外科処置のみを行った4病巣に再発を生じたが,放射線照射および外科処置と放射線照射の併用によって制御された

Assessment of ameloblastomas using MRI and dynamic contrast-enhanced MRI. International journal

Jun-ichi Asaumi, Miki Hisatomi, Yoshinobu Yanagi, Hidenobu Matsuzaki, Yong Suk Choi, Noriko Kawai, Hironobu Konouchi, Kanji Kishi

European journal of radiology 56 ( 1 ) 25 - 30 2005.10

Language：English Publishing type：Research paper (scientific journal)

We retrospectively evaluated magnetic resonance images (MRI) and dynamic contrast-enhanced MRI (DCE-MRI) of ameloblastomas. MRI and DCE-MRI were performed for 10 ameloblastomas. We obtained the following results from the MRI and DCE-MRI. (a) Ameloblastomas can be divided into solid and cystic portions on the basis of MR signal intensities. (b) Ameloblastomas show a predilection for intermediate signal intensity on T1WI, high signal intensity on T2WI, and well enhancement in the solid portion; they also show a homogeneous intermediate signal intensity on T1WI and homogeneous high signal intensity on T2WI, and no enhancement in the cystic portion. (c) The mural nodule or thick wall can be detected in ameloblastomas lesions. (d) CI curves of ameloblastomas show two patterns: the first pattern increases, reaches a plateau at 100-300 s, then sustains the plateau or decreases gradually to 600-900 s, while the other increases relatively rapidly, reaches a plateau at 90-120 s, then decreases relatively rapidly to 300 s, and decreases gradually thereafter. There was no difference in the CI curve patterns among primary and recurrent cases, a case with glandular odontogenic tumor in ameloblastoma or among histopathological types such as plexiform, follicular, mixed, desmoplastic, and unicystic type.

骨移植部を中心に再発をきたしたエナメル上皮腫の2例

崔容碩, 此内浩信, 柳文修, 久富美紀, 松崎秀信, 岸幹二

歯科放射線 44 ( 4 ) 260 - 261 2004.12

Assessment of MRI and dynamic contrast-enhanced MRI in the differential diagnosis of adenomatoid odontogenic tumor. International journal

Jun-ichi Asaumi, Yoshinobu Yanagi, Hironobu Konouchi, Miki Hisatomi, Hidenobu Matsuzaki, Hiroshi Shigehara, Kanji Kishi

European journal of radiology 51 ( 3 ) 252 - 6 2004.9

Language：English Publishing type：Research paper (scientific journal)

The radiographical differentiation of adenomatoid odontogenic tumor (AOT) from dentigerous cysts, calcifying odontogenic cysts, calcifying epithelial odontogenic tumors, odontogenic keratocysts and amelobastomas is sometimes difficult. We attempted to differentiate AOT from other lesions similar to AOT in radiographic findings using MRI. The MRI features of AOT in our three cases included homogeneous low SI in the cystic portion and homogeneous intermediate SI in the solid portion on T1WI, homogeneous high SI in the cystic portion and intermediate to slightly high SI in the solid portion on T2WI and enhancement of only the solid portion on CE-T1WI although none of the sequences included SI of calcifications. The contrast index curves in the three cases of AOT showed a gradual increase to 300 s, which signified a benign tumor. These MRI features were characteristic features of AOT and might be a basis for differentiating AOT from the above possible lesions in radiographic examinations.

Application of dynamic contrast-enhanced MRI to differentiate malignant lymphoma from squamous cell carcinoma in the head and neck. International journal

Jun-Ichi Asaumi, Yoshinobu Yanagi, Hironobu Konouchi, Miki Hisatomi, Hidenobu Matsuzaki, Kanji Kishi

Oral oncology 40 ( 6 ) 579 - 84 2004.7

Language：English Publishing type：Research paper (scientific journal)

Because malignant lymphoma, the second most common malignant tumor of the head and neck, and squamous cell carcinoma (SCC), the most common malignant tumor of the head and neck, require different treatments, it is important to be able to differentiate them. In the present study, we attempted to differentiate malignant lymphomas from SCCs using dynamic contrast-enhanced MRI (DCE-MRI). Seventeen lesions (in 8 cases) of malignant lymphoma and 30 cases of SCC were compared by DCE-MRI. Thirteen of 17 malignant lymphomas (76.5%) showed the maximum contrast index (CI) at 90-180 s, while 26 of 30 SCCs (86.7%) showed the maximum CI at a much faster 60-105 s. There was a statistically significant difference between SCC and malignant lymphoma in the time needed reach the maximum CI (p = 0.0177). There was also significant difference between SCC and malignant lymphoma in their maximum CIs (p < 0.001), with the maximum CIs of 29/30 SCCs (96.7%) above 2.0, while 12/17 malignant lymphomas (70.6%) showed CIs of less than 2.0. We consider these findings to be useful for distinguishing lymphomas from SCCs.

Radiographic examination of mesiodens and their associated complications. International journal

J I Asaumi, Y Shibata, Y Yanagi, M Hisatomi, H Matsuzaki, H Konouchi, K Kishi

Dento maxillo facial radiology 33 ( 2 ) 125 - 7 2004.3

Language：English Publishing type：Research paper (scientific journal)

OBJECTIVES: To examine mesiodens with regard to their status, their influence on adjacent teeth and their alteration during the follow-up period. METHODS: From retrospective reviews of all patients who visited our institution from 1990-2001, we identified 200 patients (256 mesiodentes) who were shown to have mesiodentes on the basis of a periapical radiograph, a panoramic radiograph or an axial radiograph. RESULTS: The number of supernumerary teeth was one in 146 cases (73%), two in 52 cases (26%) and three in 2 cases (1%). Of 256 mesiodentes, the direction of the crown of the mesiodens was inverted in 172 (67%), in a normal direction in 69 (27%) and in a horizontal direction with regard to the tooth axis in 15 (6%). Of the 147 mesiodentes for which axial radiography was performed, 131 (89%) were located at a palatal site against the dental arch, 16 (11%) overlapped the dental arch and none were at a labial site. Of our 200 cases, a delay of eruption of the permanent central incisor was seen in 12 (6%), malposition or rotation of the central incisor in 5 (2.5%) and dentigerous cyst formation arising from mesiodens in 22 (11%). Marked movement of the mesiodens was seen in 10 cases during the follow-up period of 5-7 years. Some complication arising from mesiodens was seen in 19.5% of all cases in our research. CONCLUSION: Although mesiodentes are not caused by malocclusion, they may cause it. A long period of impaction of mesiodentes may bring about dentigerous cyst formation or movement of the mesiodentes.

Radiographic examination of dentigerous cysts in the transitional dentition

Y. Shibata, J. Asaumi, Y. Yanagi, N. Kawai, M. Hisatomi, H. Matsuzaki, H. Konouchi, H. Nagatsuka, K. Kishi

Dentomaxillofacial Radiology 33 ( 1 ) 17 - 20 2004.1

Publishing type：Research paper (scientific journal)

Objectives: To examine radiographically the relationship between the deciduous tooth and dentigerous cyst of the permanent successor during the transitional dentition. Methods: From a retrospective review of all patients who visited our institution from April 1988 to August 2001, 70 patients under 16 years of age who had histologically confirmed dentigerous cysts that had developed from the central incisor to the second premolar were identified. These 70 patients were investigated using panoramic and periapical radiographs. Results: In most cases (54 cases; 77.1%) the cyst was in the premolar region. Of the 54 premolars with dentigerous cysts, the overlying deciduous tooth had already been lost in 7 cases. Of the 47 remaining premolars with associated deciduous tooth, 35 (74.5%) had bone resorption of the periapical or bifurcation region, or irregular resorption of the associated deciduous tooth. Of the remaining 12 deciduous teeth with no periapical lesions, 9 had been treated with root canal therapy. Thus, 44 of these 47 cases (93.6%) had the possibility of inflammation at the deciduous tooth associated with the dentigerous cyst. Evidence from one case in the present study suggesting the process by which cyst development occurs is also given. Conclusion: Inflammatory change at the apex of the deciduous tooth may bring on a dentigerous cyst of the permanent successor. © 2004 The British Institute of Radiology.

DOI： 10.1259/dmfr/24148363

The value of dynamic contrast-enhanced MRI in diagnosis of malignant lymphoma of the head and neck. International journal

Jun-ichi Asaumi, Yoshinobu Yanagi, Miki Hisatomi, Hidenobu Matsuzaki, Hironobu Konouchi, Kanji Kishi

European journal of radiology 48 ( 2 ) 183 - 7 2003.11

Language：English Publishing type：Research paper (scientific journal)

In this study, we attempted to diagnose malignant lymphoma on the basis of magnetic resonance imagings (MRIs) and dynamic contrast-enhanced MRI (DCE-MRI). Eighteen lesions (in eight patients), all of which had been proven histopathologically, were detected on MRI. The eight patients included five patients with diffuse large B-cell lymphoma, one with B-cell low-grade MALT lymphoma, one with follicular lymphoma, and one with Hodgkin's lymphoma. Nine lesions were located in the submandibular region, three in the buccal region, two in the orbit region, two in the submental region, and one each in the palatal and tonsil regions. The diameter of the lesions ranged between 9 and 42.2 mm (average: 22.4 mm). The signal intensities (SIs) of the 18 lesions were examined on T1-weighted (T1WI), T2WI, and gadopentetate (Gd)-T1WI. One lesion in case 8 was excluded from DCE-MRI findings, i.e., the regions of interest could not be adequately set on DCE-MRIs. The contrast index (CI) curves of the remaining 17 lesions were prepared. All 18 lesions showed almost the same images on T1WI, T2WI, and Gd-T1WI, although they represented four types of lymphoma. The images showed homogeneous SI that was intermediate to slightly high SI on T1WI, slightly high SI on T2WI, and moderately enhanced on Gd-T1WI. Thus, the cases of malignant lymphoma in this study showed relatively characteristic features based on MRI; however, these features might be non-specific. The CI curves in this study showed a relatively rapid increase, reaching a maximum CI at 45-120 s, and a relatively rapid decrease in most lesions (14/17; 82.4%); on the other hand, the curves of 3 of the 15 lesions (17.6%) showed relatively rapid increase, sustenance of a plateau, and a gradual decrease thereafter. These patterns of CI curves may indicate characteristic features useful for distinguishing malignant lymphomas from other lesions.

Usefulness of dynamic contrast-enhanced MRI in the differential diagnosis of angioleiomyoma in the buccal space Reviewed

Yoshinobu Yanagi, Jun-ichi Asaumi, Miki Hisatomi, Hidenobu Matsuzaki, Yosutoshi Honda, Hironobu Konouchi, Kanji Kishi

European Journal of Radiology Extra 48 ( 1 ) 14 - 18 2003.10

Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

We describe a case of angioleiomyoma in the buccal space, and discuss its magnetic resonance imaging (MRI) features with histopathological correlation, with particular emphasis on the usefulness of using dynamic contrast-enhanced MRI (DCE-MRI) to differentiate other possible tumors. Angioleiomyoma of the buccal space in this case corresponded clinically and histopathologically to the previous reports. The characteristic findings of angioleiomyoma were a very high signal intensity on T2WI, and extremely high enhancement on Gd-T1WI. The inner aspect of this lesion was homogeneous on both T1WI and T2WI. However, the histopathological findings included tumor substance, mucous degeneration, and mature adipose cells, and these findings were reflected only on the DCE-MRI. Furthermore, the CI-Curve of the angioleiomyoma showed a characteristic pattern, which might differentiate it from other tumors. © 2003 Elsevier Ireland Ltd. All rights reserved.

DOI： 10.1016/s1571-4675(03)00080-4

Assessment of pleomorphic adenomas using MRI and dynamic contrast enhanced MRI. International journal

Miki Hisatomi, Jun-ichi Asaumi, Yoshinobu Yanagi, Hironobu Konouchi, Hidenobu Matsuzaki, Yasutoshi Honda, Kanji Kishi

Oral oncology 39 ( 6 ) 574 - 9 2003.9

Language：English Publishing type：Research paper (scientific journal)

We evaluated magnetic resonance images (MRI) and the value of dynamic contrast enhanced MRI (DCE-MRI) of pleomorphic adenomas retrospectively. MRI was performed for 18 pleomorphic adenomas, including 11 cases with DCE-MRI. We obtained the following results on the MRI and DCE-MRI. (a). Pleomorphic adenomas showed a predilection for homogeneous intermediate signal intensity on T1-weighted images (T1WI), heterogeneous high signal intensity on T2-weighted images, and heterogeneous enhancement on Gd-T1WI. (b). Of 11 contrast index (CI) curves of pleomorphic adenomas, nine CI curves (81.8%) increased gradually to 600 s or increased gradually, reached a plateau, and sustained the plateau to 600 s. The remaining two (18.2%) increased gradually and decreased gradually thereafter. (c). CI curves reached the maximum CI index at 135-300 s.

Incidentally found and unexpected tumors discovered by MRI examination for temporomandibular joint arthrosis. International journal

Yoshinobu Yanagi, Jun-ichi Asaumi, Yuu Maki, Jun Murakami, Miki Hisatomi, Hidenobu Matsuzaki, Hironobu Konouchi, Yosutoshi Honda, Kanji Kishi

European journal of radiology 47 ( 1 ) 6 - 9 2003.7

Language：English Publishing type：Research paper (scientific journal)

We examined the frequency of incidentally found or unexpected tumors discovered at the time of magnetic resonance imaging (MRI) examinations in the temporomandibular joint (TMJ) region for patients with suspicion of TMJ arthrosis. Five MR images (T1-weighted transverse scout image and proton density and T2-weighted oblique sagittal images at the open and closed mouth) were acquired. In 2776 MRI examinations of TMJ arthrosis, two tumors were discovered. They consisted of an adenoid cystic carcinoma in the deep portion of the parotid gland, and a malignant tumor extending from the infratemporal fossa to the parapharyngeal space. The rate of incidentally founded or unexpected tumors in TMJ examinations was low (0.072%), but the two tumors found were malignant tumors, and therefore, scout image should be carefully examined, not only used for positing the slice.

Comparison of radiographic and MRI features of a root-diverging odontogenic myxoma, with discussion of the differential diagnosis of lesions likely to move roots. International journal

M Hisatomi, J Asaumi, H Konouchi, Y Yanagi, H Matsuzaki, K Kishi

Oral diseases 9 ( 3 ) 152 - 7 2003.5

Language：English Publishing type：Research paper (scientific journal)

Lesions that can produce divergence of the roots of teeth in the mandible include odontogenic cysts (odontogenic keratocysts, lateral periodontal cysts and radicular cysts), ameloblastomas, odontogenic myxomas, central giant cell granulomas, adenomatoid odontogenic tumors and aneurismal bone cysts, and other tumors. Moreover most benign jaw lesions can do this occasionally. However, when lesions--which show interradicular tear-shaped radiolucencies--are small it is often difficult to interpret them radiographically, because they do not show characteristic radiographic features. We describe a comparison of radiographic and magnetic resonance (MR) features of a root-diverging odontogenic myxoma, with discussion of the differential diagnosis of lesions likely to move roots. In addition, we discuss radiographic and MR features of possible lesions, which show similar radiographic findings to odontogenic myxoma.

Evaluation of tumor proliferation using dynamic contrast enhanced-MRI of oral cavity and oropharyngeal squamous cell carcinoma. International journal

Hironobu Konouchi, Jun ichi Asaumi, Yoshinobu Yanagi, Hiroshi Shigehara, Miki Hisatomi, Hidenobu Matsuzaki, Kanji Kishi

Oral oncology 39 ( 3 ) 290 - 5 2003.4

Language：English Publishing type：Research paper (scientific journal)

We investigated the relationship between the enhanced patterns acquired by dynamic MRI and the tumor cell proliferation estimated by immunostaining proliferating cell nuclear antigen (PCNA) in oral squamous cell carcinoma (SCC). Thirty patients with primary oral SCC underwent dynamic contrast enhanced (DCE)-MRI using a three-dimensional fast imaging with steady-state precession sequence. Tumor cell proliferation of all surgical specimens was evaluated using immunohistochemical staining with the anti-PCNA antibody. The relationship between the dynamic MRI parameters (maximum CI and maximum CI gain) and the PCNA labeling index was statistically analyzed using regression analysis. The time contrast index curves of all cases showed a rapid and high uptake pattern. The PCNA labeling index showed a significant correlation with maximum CI and maximum CI gain (P<0.0001, r=0.866 and P=0.0019, r=0.544, respectively). The assessment of DCE-MRI parameters may provide valuable information for tumor cell proliferation of the patients with oral cancer.

Effects of p53 gene therapy in radiotherapy or thermotherapy of human head and neck squamous cell carcinoma cell lines. Reviewed

Yuzuru Higuchi, Jun-ichi Asaumi, Jun Murakami, Hidenobu Matsuzaki, Toru Wakasa, Tetsuyoshi Inoue, Hiroshi Shigehara, Hironobu Konouchi, Miki Hisatomi, Shoji Kawasaki, Yoshio Hiraki, Kanji Kishi

Oncology Reports 10 ( 3 ) 671 - 677 2003.3

Thermoradiotherapy combined with adenoviral p53 gene therapy in head and neck squamous cell carcinoma cell lines Reviewed

Yuzuru Higuchi, Jun-ichi Asaumi, Jun Murakami, Hidenobu Matsuzaki, Toru Wakasa, Tetsuyoshi Inoue, Hironobu Konoucni, Miki Hisatomi, Yoshinobu Yanagi, Yasutoshi Honda, Hiroshi Shigehara, Kanji Kishi

Oncology Reports 10 ( 2 ) 415 - 420 2003.3

Language：English Publishing type：Research paper (scientific journal)

We examined effects of recombinant p53-expressing adenovirus combined with thermoradiotherapy in 8 head and neck squamous cell carcinoma (SCC) cell lines to improve the outcomes of the threatment of advanced head and neck cancer. The p53 gene therapy did not improve the discrepancy between thermoradiosensitivities among the 8 SCC cell lines. However, p53 gene therapy improved the effects of thermoradiotherapy in all 8 cell lines, and there were significant differences in four situations of the HSC4 44°C (p=0.032), SAS at 44°C (p=0.029), the KB at 43°C (p=0.025), and the Ca9-22 43°C (p=0.020). In comparing the survival rates of thermoradiotherapy with those of thermotherapy and radiotherapy, thermoradiotherapy demonstrated actual survival rates less than theoretical survival rates based on the survival rates of thermotherapy multiplied by the survival rates of radiotherapy in almost all treatments of thermoradio-gene therapy of the 8 SCC cell lines. These results demonstrate that thermoradiotherapy combined with p53 gene therapy may be a useful tool in treating SCC cells.

DOI： 10.3892/or.10.2.415

MR features of aneurysmal bone cyst of the mandible and characteristics distinguishing it from other lesions. International journal

Jun-ichi Asaumi, Hironobu Konouchi, Miki Hisatomi, Hidenobu Matsuzaki, Hiroshi Shigehara, Yasutoshi Honda, Kanji Kishi

European journal of radiology 45 ( 2 ) 108 - 12 2003.2

Language：English Publishing type：Research paper (scientific journal)

Aneurysmal bone cyst (ABC) is a relatively rare, non-neoplastic expansile lesion of bone. Bleeding may occur during an operation or biopsy for ABC, as this cyst is an aneurys with numerous pools of blood. Therefore, it is necessary to diagnose ABC before treatment or biopsy. In the present report, we describe the characteristic computed tomography (CT) and magnetic resonance imaging (MRI) features of ABC in the mandible. Based on the literature and on our own experiences, we compare with the features of ABC with the corresponding features of other lesions showing similar conventional radiographic appearances. In the present case, bone-targeting CT showed the characteristic feature, which reflected the histopathological appearance of a partially cystic meshwork divided by coarse septa. MRI showed almost homogeneous intermediate signal intensity, including a partial slight low-signal-intensity area on the T1-weighted image, and homogeneous high signal intensity, which showed a 'bubbly' appearance, on T2-weighted image. On the enhanced T1-weighted image, the intermediate signal intensity areas apart from the areas that showed slight low-signal intensity on the non-enhanced T1-weighted image, were well enhanced. This creates a 'honeycomb' appearance. The 'meshwork' appearance on bone-targeting CT, the 'bubbly' appearance on the T2WI and the 'honeycomb' appearance on Gd-T1WI may be the characteristic features of ABC.

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