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Okinawa, Japan

Tamaki K.,Tohoku University | Sasano H.,Tohoku University | Maruo Y.,Tohoku University | Takahashi Y.,Tohoku University | And 8 more authors.
Cancer Science | Year: 2010

Vasohibin-1 is a recently identified negative feedback regulator of angiogenesis induced by VEGF-A and bFGF. In this study, we first evaluated mRNA expression of vasohibin-1 and CD31 in 39 Japanese female breast carcinoma specimens including 22 invasive ductal carcinoma (IDC) and 17 ductal carcinoma in situ (DCIS) using a real-time quantitative RT-PCR (QRT-PCR) with LightCycler system. In addition, we also immunolocalized vasohibin-1 and CD31 and compared their immunoreactivity to nuclear grades and histological grades of 100 carcinoma cases (50 IDC and 50 DCIS). There were no statistically significant differences of CD31 mRNA expression and the number of CD31 positive vessels between DCIS and IDC (P=0.250 and P=0.191, respectively), whereas there was a statistically significant difference in vasohibin-1 mRNA expression and the number of vasohibin-1 positive vessels in DCIS and IDC (P=0.022 and P≤0.001, respectively). There was a significant positive correlation between vasohibin-1 mRNA level and Ki-67 labeling index in DCIS (r2=0.293, P≤0.001). In addition, vasohibin-1 mRNA expression was correlated with high nuclear and histological grades in DCIS cases and a significant positive correlation was detected between the number of vasohibin-1 positive vessels and Ki-67 labeling index or nuclear grade or Van Nuys classification of carcinoma cells (P≤0.001, respectively). These results all indicate the possible correlation between aggressive biological features in DCIS including increased tumor cell proliferation and the status of neovascularization determined by vasohibin-1 immunoreactivity. © 2010 Japanese Cancer Association.

Tamaki K.,Tohoku University | Ishida T.,Tohoku University | Miyashita M.,Tohoku University | Amari M.,Tohoku University | And 3 more authors.
Cancer Science | Year: 2011

The present study retrospectively evaluated the mammographic findings of 606 Japanese women with breast cancer (median age 50years; range 27-89years) and correlated them with histopathological characteristics. Mammographic findings were evaluated with an emphasis on mass shape, margin, density, calcification, and the presence of architectural distortion; these findings were correlated with histopathological characteristics such as intrinsic subtype, histological grade, lymphovascular invasion, and the Ki-67 labeling index. An irregular mass shape and masses with a spiculated margin were significantly higher in the group of patients with luminal A breast cancer than in patients with masses that were lobular or round, or in tumors with an indistinct or microlobulated periphery (P=0.017, P=0.024, P<0.001, and P=0.001, respectively). Irregular mass shape and spiculated periphery were significantly lower in patients with Grade 3 cancer (P<0.001 for both). In terms of lymphovascular invasion, there were significant differences between oval and irregular or round mass shape (P=0.008 and P=0.034), between tumors with a microlobulated and indistinct periphery (P=0.014), between tumors with a punctate and amorphous or pleomorphic calcification shape (P=0.030 and 0.038), and between the presence and absence of architectural distortion (P=0.027). Equivalent or low-density masses were also higher in Grade 1 breast cancers (P=0.007). There were significant differences in the Ki-67 labeling index between irregular and lobular or round tumors (P<0.001 and P=0.014), as well as between spiculated and indistinct or microlobulated tumors (P<0.001 for both). Significant differences were noted in the mammographic features of different primary breast cancer subtypes. These proposed mammographic diagnostic criteria based on biological characteristics may contribute to a more accurate prediction of biological behavior of breast malignancies. © 2011 Japanese Cancer Association.

Tamaki K.,Nahanishi Clinic | Tamaki K.,Tohoku University | Tamaki N.,Nahanishi Clinic | Kamada Y.,Nahanishi Clinic | And 4 more authors.
Japanese Journal of Clinical Oncology | Year: 2013

Objective: We evaluated the biologic features of breast tissues using a newly developed noninvasive diagnostic system, named virtual touch tissue quantification. Methods: A total of 180 patients including 115 invasive ductal carcinoma, 30 ductal carcinoma in situ, 4 mucinous carcinoma, 7 invasive lobular carcinoma, 8 fibroadenoma, 12 fibrocystic change and 4 intraductal papilloma were studied at Nahanishi Clinic, Okinawa. We first compared the results of virtual touch tissue quantification according to each histologic subtype and determined the optimal cutoffvalues for virtual touch tissue quantification to distinguish benign from malignant tissues, using the receiver operating characteristic method. In addition, we also examined the correlation between virtual touch tissue quantification velocities and Ki-67, estrogen receptor, progesterone receptor or human epidermal growth factor receptor 2 in cases of invasive ductal carcinoma using linear regression analyses and Student's t-test. Results: Virtual touch tissue quantification velocities were statistically higher in malignant cases than in benign cases (P < 0.05, respectively) and the best cutoffvalue for the virtual touch tissue quantification velocity which could differentiate benign from malignant cases was 2.89 m/s. There were statistically significant correlations between the virtual touch tissue quantification velocity and the Ki-67 labeling index (r = 0.338, r2 = 0.114 and P ≤ 0.001) and significant inverse correlations between virtual touch tissue quantification and the estrogen receptor (r = 20.311, r2 = 0.097 and P ≤ 0.001) or progesterone receptor (r = 20.361, r2 = 0.131 and P ≤ 0.001) status of invasive ductal carcinoma. There were also significant differences of the average velocities between human epidermal growth factor receptor 2-positive (6.39±1.44 m/s) and -negative (4.43±1.41 m/s) cases (P < 0.001). Conclusion: Virtual touch tissue quantification could be a valuable clinical tool for estimating breast cancer pathology in a non-invasive fashion. © The Author 2013. Published by Oxford University Press. All rights reserved.

Tamaki K.,Tohoku University | Ishida T.,Tohoku University | Miyashita M.,Tohoku University | Amari M.,Tohoku University | And 4 more authors.
Cancer Science | Year: 2012

The aim of this study is to evaluate the correlation between multidetector row helical computed tomography (MDCT) findings and the histopathological characteristics of patients with invasive ductal carcinoma. We retrospectively reviewed MDCT findings and the corresponding histopathological features of 442 women with invasive ductal carcinoma. We received informed consent from the patients and the protocol was approved by the Ethics Committee at Tohoku University. The median age was 53years (26-89years). We examined the MDCT findings based on mass shape classified into well, moderate, poorly and scattered demarcated shapes, the enhancement pattern classified into homogenous, heterogeneous, rim and poor, and mass density classified into high, intermediate or low. We subsequently compared these radiological findings with the histological characteristics and clinical outcome. Poorly demarcated types were higher in ER+/HER2- (P=0.008), while the well-demarcated type was higher in ER-/HER2- and ER-/HER2+ (P<0.001 and P=0.010). Rim pattern was higher in ER-/HER2- (P<0.001). Intermediate or low density was higher in ER-/HER2- (P<0.001, respectively). Further analysis based on histological grade, mitotic counts and lymphovascular invasion demonstrated that the well-demarcated shape was higher in grade 2 and 3 (P=0.006 and P<0.001, respectively), and rim pattern was observed in grade 3 (P<0.001). Regarding mitotic counts, poorly and scattered demarcated shapes were observed in score 1 (P=0.008 and P=0.014), while well-demarcated shape and rim enhancement were observed in score 3 (P<0.001, respectively). Lymphovascular invasion correlated with a moderate demarcated shape (P=0.029). Regarding recurrence rates, there were statistically significant differences between well and moderate, poorly or scattered demarcated shapes (P=0.007, 0.028 and 0.035, respectively). These proposed MDCT diagnostic criteria based on biological characteristics contribute to more accurately predicting the biological behavior of breast cancer patients. © 2011 Japanese Cancer Association.

Tamaki K. Kentaro,Tohoku University | Sasano H.,Tohoku University | Ishida T.,Tohoku University | Miyashita M.,Tohoku University | And 4 more authors.
Cancer Science | Year: 2010

The roles of core needle biopsy (CNB) have become well established as an important preoperative diagnostic method for breast lesions. We examined the concordance of histological types, nuclear grades, hormone receptors, and human epidermal growth factor receptor 2 (HER2) status between CNB and surgical specimens in 353 cases. In addition, we analyzed the correlation between the number of CNB specimens obtained and accuracy of histological factors in order to explore the optimal number of CNB specimens. Between CNB and surgical specimens, concordance rates of histological type, nuclear grade, estrogen receptor (ER), and progesterone receptor (PgR) status (cut-off 0-<1%, 1-10%, and 10%<), and HER2 were 84.4%, 81.3%, 92.9%, and 89.3%, respectively. In 52 of 353 patients who were histopathologically diagnosed as ductal carcinoma in situ (DCIS) by CNB, final diagnosis was changed in to invasive ductal carcinoma (IDC) in surgical specimens. Statistically significant differences were detected in the discrepancy of the following factors between CNB and subsequent surgical specimens: histological types, nuclear grade, and PgR, between patients who received four or more cores and those who had received three or less cores. In addition, a similar tendency was also detected in estrogen receptor (ER) and HER2 as in the above, and the cases that received four cores reached to 100% concordance in diagnosis between CNB and surgical specimens. Therefore, the optimal numbers of CNB were considered four at least in assessing the histological type, invasion, nuclear grade, hormone receptor status, and HER2 status of individual patients in the preoperative setting. © 2010 Japanese Cancer Association.

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