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Breast and Endocrine Surgery

Breast and Endocrine Surgery

The Department of Breast and Endocrine Surgery specializes in the diagnosis and treatment of breast cancer, phyllodes tumors, breast fibrocystic disease, thyroid cancer, thyroid mass and, hyperparathyroidism.

Medical services

Supervising physicians and specialists from the Japan Surgical Society and the Japanese Breast Cancer Society; and experienced specialists from the Japan Association of Endocrine Surgeons, the Japanese Society of Thyroid Surgery, and Japan Society for Endoscopic Surgery perform examinations, surgery, anticancer chemotherapy, and hormone therapy.

Diagnosis and treatment policy

Our aim is to remain the most patient-friendly surgical department with the best therapeutic outcomes in Japan. In making diagnoses and selecting treatments, physicians discuss the situation with patients. The patient’s clinical course will also be observed carefully after surgery so as to improve quality of life.


Suitable breast cancer treatment based on close cooperation among the Department of Breast and Endocrine Surgery, Department of Radiology, and Department of Pathology

Mammography, ultrasound examination, MRI, aspiration cytology, and needle biopsy are used to determine which patients require breast conserving surgery and which patients pectoral muscle-conserving mastectomy.

  • Anticancer chemotherapy and hormone therapy based on abundant experience are provided to patients after they are given information that helps them fully understand the treatment.

Target diseases

Breast cancer, breast fibrocystic disease, phyllodes tumor, intraductal papilloma, mastitis, gynecomastia, other breast mass, thyroid cancer, Grave’s disease, nontoxic multinodular goiter, follicular goiter, chronic thyroiditis, subacute thyroiditis, hyperparathyroidism, neck mass.

Advanced treatments/ Specialized treatments

Breast cancer treatment

For patients who require total mastectomy, reconstructive mammaplasty and tissue expander insertion surgery are performed.

Frequently performed tests

Breast disorders

Mammography, ultrasound examination, conventional CT, MRI, aspiration cytodiagnosis, needle biopsy, bone scintigraphy, PET (positron-emission tomography)

Thyroid/endocrine disorders

Ultrasound examination, CT, MRI, aspiration cytodiagnosis, scintigraphy (thallium, MIBI)

Keiichiro Tada


Breast and Endocrine Surgery


M.D. , Ph.D.


Breast Imaging, Breast Surgery, Endocrine Therapy, Chemotherapy

Research Interests

Breast Surgery



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Areas of expertise, treatment and examination methods

  1. Breast cancer
  2. Thyroid cancer
  3. Primary hyperparathyroidism
  4. Basedow's disease
Treatment methods
  1. Breast surgery
  2. Chemotherapy
  3. Hormone therapy
  4. Radiation therapy
Examination methods
  1. Ultrasonography
  2. Mammography
  3. Fine needle aspiration cytology
  4. Core needle biopsy
  5. Vacuum assisted biopsy
  6. Stereotactic mammotome biopsy
  7. MRI
  8. CT
  9. Bonescan

Numbers of major operations and treatments performed

Name of operation/treatment Number
1 Breast-conserving surgery for breast cancer 66
2 Mastectomy for breast cancer 58
3 Mastectomy with tissue expander 10
4 Sentinel lymph node biopsy 94
5 Axillary node dissection 30
6 Resection of benign mammary tumor 14
7 Thyroid cancer resection 41
8 Benign thyroid tumor removal 8
9 Parathyroid adenoma removal 21


Numbers of major and specialized examinations conducted in this department

Name of examination Number
1 Ultrasonograhy 2306
2 Mammography 1539
3 Stereo-guided mammotome biopsy 18


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