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A pathological diagnosis is based on microscopic examination of tissues and cells collected at surgery or biopsy to compare with the clinical diagnosis and assess the disease. Autopsy is also performed to elucidate pathology and improve the quality of medical care.

Medical services

Thirteen doctors (eleven certified pathologists) and 17 full-time technologists perform 16,700 tissue diagnoses, 24,000 cytologic diagnoses, 1,300 intraoperative diagnoses, and 50 autopsy diagnoses annually. The division has started providing pathology service for hospitals without sufficient pathologists and also outpatient service on matters concerning pathology diagnosis.

Diagnosis policy

“Accurate and high-quality pathological diagnosis.” Regular case review conferences are held jointly with the clinical division to make high-quality diagnoses. Our Division of Histopathology plays a leading role in Japan in promoting rapid pathological diagnosis, such as “same day diagnosis” for biopsy specimens.


  • Diagnosis of cancer : respiratory tract, mediastinum, liver, gallbladder, pancreas, gastrointestinal tract, mammary gland, bone and soft tissue, lymphoma, brain tumor, gynecology, urinary organs, skin
  • Diagnosis of organ transplant-associated diseases
  • Immunohistochemical examination
  • Genetic diagnosis
Tetsuo Ushiku

Tetsuo Ushiku




M.D. , Ph.D.


Gastrointestinal pathology

Research Interests

The pathology and molecular biology of gastrointestinal tumor


Japanese, English

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