Patterns of care study in Japan: Analysis of patients subjected to mastectomy followed by radiotherapy

Naoto Shikama, Shigeru Sasaki, Michihide Mitsumori, Masahiro Hiraoka, Chikako Yamauchi, Tokihiro Yamamoto, Teruki Teshima, Toshihiko Inoue

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Background: Two prospective studies reported in 1997 demonstrated that postoperative radiotherapy after mastectomy was not only associated with a higher loco-regional control rate but also with a higher overall survival rate. The purpose of this study is to clarify the processes of care for patients undergoing mastectomy and postoperative radiotherapy in Japan. Methods: A national survey carried out in 1998-2000, involving 79 Japanese institutions by two-stage cluster sampling of institutions and patients, disclosed that 1124 patients with breast cancer had been treated between 1995 and 1997. Mastectomy followed by radiotherapy was performed on 258 patients. Results: The compliance rates for pre-treatment evaluation, including history, physical examination and mammography, averaged ∼50% (24-81%). The chest wall was irradiated in only 19% of the patients and regional node irradiation was carried out for 70-86%. Radiation treatment planning with the aid of computed tomography was done in only 29% of patients (university hospitals or cancer centers, 39%; other hospitals, 17%; P = 0.001). Hormonal therapy was administered to 56% of the patients who showed no endocrine responsiveness. Non-intensive chemotherapy, which did not include the use of anthracycline or taxol, was used in 55% of the patients who received chemotherapy. Conclusions: There is room for improvement regarding some aspects of radiotherapy and adjuvant systemic therapies. Especially in the field of radiotherapy, significant differences were found among the treatment techniques employed in various institutions.

Original languageEnglish (US)
Pages (from-to)456-462
Number of pages7
JournalJapanese Journal of Clinical Oncology
Volume33
Issue number9
DOIs
StatePublished - Sep 1 2003
Externally publishedYes

Fingerprint

Mastectomy
Japan
Radiotherapy
Therapeutics
Drug Therapy
Adjuvant Radiotherapy
Anthracyclines
Thoracic Wall
Mammography
Paclitaxel
Physical Examination
Patient Care
Survival Rate
History
Tomography
Prospective Studies
Radiation
Breast Neoplasms
Neoplasms

Keywords

  • Breast cancer
  • Mastectomy
  • Patterns of care study
  • Radiotherapy

ASJC Scopus subject areas

  • Oncology

Cite this

Patterns of care study in Japan : Analysis of patients subjected to mastectomy followed by radiotherapy. / Shikama, Naoto; Sasaki, Shigeru; Mitsumori, Michihide; Hiraoka, Masahiro; Yamauchi, Chikako; Yamamoto, Tokihiro; Teshima, Teruki; Inoue, Toshihiko.

In: Japanese Journal of Clinical Oncology, Vol. 33, No. 9, 01.09.2003, p. 456-462.

Research output: Contribution to journalArticle

Shikama, N, Sasaki, S, Mitsumori, M, Hiraoka, M, Yamauchi, C, Yamamoto, T, Teshima, T & Inoue, T 2003, 'Patterns of care study in Japan: Analysis of patients subjected to mastectomy followed by radiotherapy', Japanese Journal of Clinical Oncology, vol. 33, no. 9, pp. 456-462. https://doi.org/10.1093/jjco/hyg085
Shikama, Naoto ; Sasaki, Shigeru ; Mitsumori, Michihide ; Hiraoka, Masahiro ; Yamauchi, Chikako ; Yamamoto, Tokihiro ; Teshima, Teruki ; Inoue, Toshihiko. / Patterns of care study in Japan : Analysis of patients subjected to mastectomy followed by radiotherapy. In: Japanese Journal of Clinical Oncology. 2003 ; Vol. 33, No. 9. pp. 456-462.
@article{cb732bf0178b4629a4b87bb5e805f544,
title = "Patterns of care study in Japan: Analysis of patients subjected to mastectomy followed by radiotherapy",
abstract = "Background: Two prospective studies reported in 1997 demonstrated that postoperative radiotherapy after mastectomy was not only associated with a higher loco-regional control rate but also with a higher overall survival rate. The purpose of this study is to clarify the processes of care for patients undergoing mastectomy and postoperative radiotherapy in Japan. Methods: A national survey carried out in 1998-2000, involving 79 Japanese institutions by two-stage cluster sampling of institutions and patients, disclosed that 1124 patients with breast cancer had been treated between 1995 and 1997. Mastectomy followed by radiotherapy was performed on 258 patients. Results: The compliance rates for pre-treatment evaluation, including history, physical examination and mammography, averaged ∼50{\%} (24-81{\%}). The chest wall was irradiated in only 19{\%} of the patients and regional node irradiation was carried out for 70-86{\%}. Radiation treatment planning with the aid of computed tomography was done in only 29{\%} of patients (university hospitals or cancer centers, 39{\%}; other hospitals, 17{\%}; P = 0.001). Hormonal therapy was administered to 56{\%} of the patients who showed no endocrine responsiveness. Non-intensive chemotherapy, which did not include the use of anthracycline or taxol, was used in 55{\%} of the patients who received chemotherapy. Conclusions: There is room for improvement regarding some aspects of radiotherapy and adjuvant systemic therapies. Especially in the field of radiotherapy, significant differences were found among the treatment techniques employed in various institutions.",
keywords = "Breast cancer, Mastectomy, Patterns of care study, Radiotherapy",
author = "Naoto Shikama and Shigeru Sasaki and Michihide Mitsumori and Masahiro Hiraoka and Chikako Yamauchi and Tokihiro Yamamoto and Teruki Teshima and Toshihiko Inoue",
year = "2003",
month = "9",
day = "1",
doi = "10.1093/jjco/hyg085",
language = "English (US)",
volume = "33",
pages = "456--462",
journal = "Japanese Journal of Clinical Oncology",
issn = "0368-2811",
publisher = "Oxford University Press",
number = "9",

}

TY - JOUR

T1 - Patterns of care study in Japan

T2 - Analysis of patients subjected to mastectomy followed by radiotherapy

AU - Shikama, Naoto

AU - Sasaki, Shigeru

AU - Mitsumori, Michihide

AU - Hiraoka, Masahiro

AU - Yamauchi, Chikako

AU - Yamamoto, Tokihiro

AU - Teshima, Teruki

AU - Inoue, Toshihiko

PY - 2003/9/1

Y1 - 2003/9/1

N2 - Background: Two prospective studies reported in 1997 demonstrated that postoperative radiotherapy after mastectomy was not only associated with a higher loco-regional control rate but also with a higher overall survival rate. The purpose of this study is to clarify the processes of care for patients undergoing mastectomy and postoperative radiotherapy in Japan. Methods: A national survey carried out in 1998-2000, involving 79 Japanese institutions by two-stage cluster sampling of institutions and patients, disclosed that 1124 patients with breast cancer had been treated between 1995 and 1997. Mastectomy followed by radiotherapy was performed on 258 patients. Results: The compliance rates for pre-treatment evaluation, including history, physical examination and mammography, averaged ∼50% (24-81%). The chest wall was irradiated in only 19% of the patients and regional node irradiation was carried out for 70-86%. Radiation treatment planning with the aid of computed tomography was done in only 29% of patients (university hospitals or cancer centers, 39%; other hospitals, 17%; P = 0.001). Hormonal therapy was administered to 56% of the patients who showed no endocrine responsiveness. Non-intensive chemotherapy, which did not include the use of anthracycline or taxol, was used in 55% of the patients who received chemotherapy. Conclusions: There is room for improvement regarding some aspects of radiotherapy and adjuvant systemic therapies. Especially in the field of radiotherapy, significant differences were found among the treatment techniques employed in various institutions.

AB - Background: Two prospective studies reported in 1997 demonstrated that postoperative radiotherapy after mastectomy was not only associated with a higher loco-regional control rate but also with a higher overall survival rate. The purpose of this study is to clarify the processes of care for patients undergoing mastectomy and postoperative radiotherapy in Japan. Methods: A national survey carried out in 1998-2000, involving 79 Japanese institutions by two-stage cluster sampling of institutions and patients, disclosed that 1124 patients with breast cancer had been treated between 1995 and 1997. Mastectomy followed by radiotherapy was performed on 258 patients. Results: The compliance rates for pre-treatment evaluation, including history, physical examination and mammography, averaged ∼50% (24-81%). The chest wall was irradiated in only 19% of the patients and regional node irradiation was carried out for 70-86%. Radiation treatment planning with the aid of computed tomography was done in only 29% of patients (university hospitals or cancer centers, 39%; other hospitals, 17%; P = 0.001). Hormonal therapy was administered to 56% of the patients who showed no endocrine responsiveness. Non-intensive chemotherapy, which did not include the use of anthracycline or taxol, was used in 55% of the patients who received chemotherapy. Conclusions: There is room for improvement regarding some aspects of radiotherapy and adjuvant systemic therapies. Especially in the field of radiotherapy, significant differences were found among the treatment techniques employed in various institutions.

KW - Breast cancer

KW - Mastectomy

KW - Patterns of care study

KW - Radiotherapy

UR - http://www.scopus.com/inward/record.url?scp=0642372043&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0642372043&partnerID=8YFLogxK

U2 - 10.1093/jjco/hyg085

DO - 10.1093/jjco/hyg085

M3 - Article

C2 - 14594939

AN - SCOPUS:0642372043

VL - 33

SP - 456

EP - 462

JO - Japanese Journal of Clinical Oncology

JF - Japanese Journal of Clinical Oncology

SN - 0368-2811

IS - 9

ER -