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Featured researches published by Sayaka Kuba.


Surgery Today | 2009

Vacuum-assisted biopsy and steroid therapy for granulomatous lobular mastitis: Report of three cases

Sayaka Kuba; Junzo Yamaguchi; Hiroshi Ohtani; Isao Shimokawa; Shigeto Maeda; Takashi Kanematsu

We report the cases of three patients with granulomatous lobular mastitis (GLM), who were treated successfully with low-dose steroid therapy. Furthermore, the findings of our review of 271 patients reported in the literature suggest that steroid therapy is the treatment of choice for GLM.


Japanese Journal of Clinical Oncology | 2014

Treatment and Prognosis of Breast Cancer Patients with Brain Metastases According to Intrinsic Subtype

Sayaka Kuba; Mayumi Ishida; Yoshiaki Nakamura; Kosho Yamanouchi; Shigeki Minami; Kenichi Taguchi; Susumu Eguchi; Shinji Ohno

OBJECTIVE How breast cancer subtypes should affect treatment decisions for breast cancer patients with brain metastases is unclear. We analyzed local brain metastases treatments and their outcomes according to subtype in patients with breast cancer and brain metastases. METHODS We reviewed records and database information for women treated at the National Kyushu Cancer Center between 2001 and 2010. Patients were divided into three breast cancer subtype groups: Luminal (estrogen receptor positive and/or progesterone receptor positive, but human epidermal growth factor receptor 2 negative); human epidermal growth factor receptor 2 positive and triple negative (estrogen receptor negative, progesterone receptor negative and human epidermal growth factor receptor 2 negative). RESULTS Of 524 advanced breast cancer patients, we reviewed 65 (12%) with brain metastases and records showing estrogen receptor, progesterone receptor and human epidermal growth factor receptor 2 status, as well as outcome data; there were 26 (40%) Luminal, 26 (40%) had human epidermal growth factor receptor 2 and 13 (20%) had triple negative subtypes. There was no statistical difference in the number of brain metastases among subtypes; however, rates of stereotactic radiosurgery or surgery for brain metastases differed significantly by subtype (human epidermal growth factor receptor 2: 81%, Luminal: 42% and triple negative: 47%; P = 0.03). Patients having the human epidermal growth factor receptor 2 subtype, a performance status of ≤1 and ≤4 brain metastases, who underwent systemic therapy after brain metastases and underwent stereotactic radiosurgery or surgery, were predicted to have longer overall survival after brain metastases. Multivariate analysis demonstrated that not having systemic therapy and not having the human epidermal growth factor receptor 2 subtype were independent factors associated with an increased risk of death (hazard ratio 2.4, 95% confidence interval 1.01-5.6; P = 0.05 and hazard ratio 2.9, 95% confidence interval 1.5-5.8; P = 0.003, respectively). CONCLUSION Our study showed that local brain treatments and prognosis differed by subtype in breast cancer patients with brain metastases.


Virchows Archiv | 2011

Incomplete inside-out growth pattern in invasive breast carcinoma: association with lymph vessel invasion and recurrence-free survival.

Sayaka Kuba; Hiroshi Ohtani; Junzo Yamaguchi; Hiroko Hayashi; Tatsuya Uga; Takashi Kanematsu; Isao Shimokawa

Invasive micropapillary carcinoma (IMPC) is a rare subtype of epithelial tumor of the breast listed in the 2003 World Health Organization histologic classification of tumors of the breast. It is characterized by inside-out micropapillary morphology, frequent lymph vessel invasion (LVI), and lymph node metastasis; however, its etiology remains unknown. This study investigated the incomplete inside-out growth pattern (IGP) in invasive ductal carcinoma, not otherwise specified (NOS), and examined the association between incomplete IGP and clinicopathologic features, including the presence of intratumoral lymph vessels (ILV), LVI, nodal metastasis, and prognosis. Tumor tissues from 166 invasive duct carcinomas NOS and 10 IMPCs were immunostained using an anti-epithelial membrane antigen antibody to detect IGP and with D2-40 antibody to determine the presence of ILV and LVI. Incomplete IGP was detected focally in 88 (53%) of 166 invasive duct carcinomas NOS. Transition areas between IMPC and invasive duct carcinoma NOS also showed prominent incomplete IGP in 9 (90%) of 10 IMPCs. Incomplete IGP in invasive duct carcinomas NOS was associated with larger tumor size, higher frequencies of ILV, LVI, nodal metastasis, and poorer recurrence-free survival by univariate analysis. Incomplete IGP, ILV, and tumor size independently affected LVI by multivariate analysis. These findings indicate that incomplete IGP of tumor cell clusters is not uncommon and is a useful tool for predicting LVI in invasive duct carcinoma NOS of the breast.


International Journal of Surgery | 2017

Total thyroidectomy versus thyroid lobectomy for papillary thyroid cancer: Comparative analysis after propensity score matching: A multicenter study

Sayaka Kuba; Kosho Yamanouchi; Naomi Hayashida; Shigeto Maeda; Toshiyuki Adachi; Chika Sakimura; Fusako Kawakami; Hiroshi Yano; Megumi Matsumoto; Ryota Otsubo; Shuntaro Sato; Hikaru Fujioka; Tamotsu Kuroki; Takeshi Nagayasu; Susumu Eguchi

BACKGROUND In patients with papillary thyroid carcinoma (PTC), the role of total thyroidectomy (TT) versus that of thyroid lobectomy (TL) has been controversial. METHODS This retrospective study was approved by our institutional review board, and the requirement to obtain informed consent was waived. In total, 173 patients with 1- to 5-cm stage cN0 and cM0 PTC tumors treated by curative surgery from 1994 to 2008 were evaluated. Clinicopathologic features and adverse events were compared between patients who underwent TT and those who underwent TL. After adjustment for differences in baseline clinicopathologic factors using propensity score matching, we compared recurrence-free survival (RFS) and OS. RESULTS TL was performed in 120 patients and TT in 53 patients. Patients who underwent TT were older; had larger tumors; more frequently had nodal metastasis, multifocal tumors, and extracapsular invasion; and more frequently underwent radioactive iodine ablation than patients who underwent TL. Hypocalcemia requiring medication and recurrent laryngeal nerve paralysis were more frequent in TT than TL. The 10-year RFS and OS of all patients were 93.3% and 96.7%, respectively. There was no significant difference in RFS (90.6% vs 93.0% in TT and TL groups, respectively) or OS (96.2% vs 96.9% in TT and TL groups, respectively) according to the extent of surgical resection after propensity score matching. CONCLUSION Equivalent prognoses were observed for patients with 1- to 5-cm stage cN0 and cM0 PTC tumors treated by TL or TT after propensity score matching. Adverse events occurred less frequently in patients who underwent TL than TT.


Breast Cancer | 2016

Aromatase inhibitors with or without luteinizing hormone-releasing hormone agonist for metastatic male breast cancer: report of four cases and review of the literature.

Sayaka Kuba; Mayumi Ishida; Masahiro Oikawa; Yoshiaki Nakamura; Kosho Yamanouchi; Eriko Tokunaga; Kenichi Taguchi; Taito Esaki; Susumu Eguchi; Shinji Ohno

Abstract The roles of aromatase inhibitors (AIs) and luteinizing hormone–releasing hormone (LH–RH) agonists in the management of male breast cancer remain uncertain, with no reports in Japanese men. We report four Japanese male patients with metastatic breast cancer treated with AIs with or without an LH–RH agonist, and consider the relationship between treatment effect and estradiol (E2) concentration. Three patients were initially treated with AI alone after selective estrogen receptor modulators (SERMs), and one received AIs plus an LH–RH agonist after a SERM. Two patients treated with an AI alone responded, one patient with E2 levels below the lower assay limit and the other with levels above the limit. The other treated with an AI alone experienced progression regardless of the E2 levels below the lower assay limit, however, responded after the addition of an LH–RH agonist. E2 concentrations were related to the efficacy of treatment in one patient. The patient initially treated with an AI plus an LH–RH agonist also responded. No grade 3 or 4 adverse events were observed in any of the patients treated with AIs with or without an LH–RH agonist. AIs with or without an LH–RH agonist offer an effective treatment option for hormone receptor-positive metastatic male breast cancer.


Tohoku Journal of Experimental Medicine | 2015

Increase in Operator’s Sympathetic Nerve Activity during Complicated Hepatobiliary Surgery: Evidence for Surgeons’ Mental Stress

Kosho Yamanouchi; Naomi Hayashida; Sayaka Kuba; Chika Sakimura; Tamotsu Kuroki; Michita Togo; Noritada Katayama; Noboru Takamura; Susumu Eguchi

Surgeons often experience stress during operations. The heart rate variability (HRV) is the variability in the beat-to-beat interval, which has been used as parameters of stress. The purpose of this study was to evaluate mental stress of surgeons before, during and after operations, especially during pancreaticoduodenectomy (PD) and living donor liver transplantation (LDLT). Additionally, the parameters were compared in various procedures during the operations. By frequency domain method using electrocardiograph, we measured the high frequency (HF) component, representing the parasympathetic activity, and the low frequency (LF)/HF ratio, representing the sympathetic activity. In all 5 cases of PD, the surgeon showed significantly lower HF component and higher LF/HF during operation, indicating predominance of sympathetic nervous system and increased stress, than those before the operation (p < 0.01) and these did not return to the baseline level one hour after the operation. Out of the 4 LDLT cases, the value of HF was decreased in two and the LF/HF increased in three cases (p < 0.01) during the operation compared to those before the operation. In all cases, the value of HF was decreased and/or the LF/HF increased significantly during the reconstruction of the vessels or bile ducts than during the removal of the liver. Thus, sympathetic nerve activity increased during hepatobiliary surgery compared with the level before the operation, and various procedures during the operations induced diverse changes in the autonomic nervous activities. The HRV analysis could assess the chronological changes of mental stress by measuring the autonomic nervous balances.


Supportive Care in Cancer | 2018

Awareness of dysgeusia and gustatory tests in patients undergoing chemotherapy for breast cancer

Sayaka Kuba; Rie Fujiyama; Kosho Yamanouchi; Michi Morita; Chika Sakimura; Toshiko Hatachi; Megumi Matsumoto; Hiroshi Yano; Mitsuhisa Takatsuki; Naomi Hayashida; Takeshi Nagayasu; Susumu Eguchi

PurposeWe analyzed the prevalence of gustatory test abnormalities in breast cancer (BC) patients undergoing chemotherapy.MethodsWe enrolled 43 BC patients undergoing chemotherapy and 38 BC patients who had never undergone chemotherapy (control group). Two gustatory tests were conducted: an instillation method examining the threshold for four basic taste stimuli and an electrogustometry method measuring the threshold for perception with electric stimulation at the front two-thirds of the tongue (cranial nerve VII) and at the back third of the tongue (cranial nerve IX). The results of the two gustatory tests and clinicopathological factors were compared between the chemotherapy and control groups and between patients with and without awareness of dysgeusia in the chemotherapy group.ResultsIn the chemotherapy group, 19 (44%) patients were aware of dysgeusia and 8 (19%) had hypogeusia using the instillation method. Although more patients had parageusia in the chemotherapy than control group, no significant differences in the results of the two gustatory tests were observed. Patients with dysgeusia awareness had a higher threshold at cranial nerve IX using the electrogustometry method than those without dysgeusia awareness; no significant differences in hypogeusia were observed using the instillation method. In fact, 74% (14/19) of patients with dysgeusia awareness could identify the four tastes accurately using the instillation method. Similar results were observed for the instillation and electrogustometry methods at cranial nerve VII.ConclusionsWhile approximately half of the chemotherapy patients were aware of dysgeusia, 81% (35/43) of them could accurately identify the four basic tastes using the instillation method.


International Surgery | 2017

The Preservation and Autotransplantation of the Parathyroid Glands in Total Thyroidectomy in Patients With Thyroid Cancer—A Strategy for Avoiding Permanent Hypoparathyroidism

Kosho Yamanouchi; Naomi Hayashida; Sayaka Kuba; Chika Sakimura; Mitsuhisa Takatsuki; Susumu Eguchi

Hypoparathyroidism is a complication that occurs after total thyroidectomy (TT) in patients with thyroid cancer. We tried to determine a strategy for avoiding permanent hypoparathyroidism. A total ...


Clinical Breast Cancer | 2017

Adherence to Adjuvant Endocrine Therapy in Women With Breast Cancer: A Prospective Observational Study in Japanese Women

Sayaka Kuba; Shigeto Maeda; Megumi Matsumoto; Kosho Yamanouchi; Hiroshi Yano; Michi Morita; Chika Sakimura; Toshiko Hatachi; Yukiko Tokai; Mitsuhisa Takatsuki; Hikaru Fujioka; Naomi Hayashida; Takeshi Nagayasu; Susumu Eguchi

Introduction: Nonadherence to adjuvant endocrine therapy has been poorly studied in Asian patients with breast cancer. We therefore assessed adherence to endocrine therapy among women with breast cancer in Japan. Patients and Methods: We conducted a prospective observational study among Japanese women with hormone receptor‐positive breast cancer. Patients brought their pill packets to visits for 1 year and answered a questionnaire. We also examined prescription records during the study period. Adherence to endocrine therapy was defined as patients who had taken > 80% of the pills according to the packets during the study. Clinicopathologic features and questionnaires were compared between adherent and nonadherent patients. Results: A total of 234 patients completed the trial, of whom 85% demonstrated adherence based on pill packets, and 98% demonstrated adherence based on prescription records. Mastectomy, higher stage, nodal metastasis and adjuvant chemotherapy were correlated with adherence based on pill packets. Adjuvant chemotherapy was an independent factor associated with adherence. According to the questionnaire, adherent patients were more likely to consult a nurse when they had trouble with their medication. These patients also emphasized the efficacy rather than the side effects of the medication. Nonadherent patients were aware that they were being nonadherent. Conclusion: The results of this study revealed that 85% of patients were adherent to endocrine therapy, but physicians were unaware of the nonadherent patients. Raised awareness of nonadherence and information sharing between patients and medical teams might increase adherence to endocrine therapy.


Haemophilia | 2016

The first report of the thyroid function of haemophilic patients with HIV/HCV co-infection in Japan.

Chika Sakimura; Susumu Eguchi; Kosho Yamanouchi; Shigeki Minami; Sayaka Kuba; Naomi Hayashida; Akihiko Soyama; Masaaki Hidaka; Mitsuhisa Takatsuki; Shigeto Maeda; Tamotsu Kuroki

A high incidence of thyroid dysfunction is reported in patients with HIV or HCV mono‐infection. We have conducted a periodic medical examination including the thyroid function for haemophilic patients with HIV/HCV co‐infection due to contaminated blood products.

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