Comprehensive locoregional treatment and systemic therapy for postmastectomy isolated locoregional recurrence.
OBJECTIVE
To assess the impact of comprehensive locoregional therapy and systemic therapy on disease control and survival for postmastectomy patients with isolated locoregional recurrence (ILRR).


METHODS
A total of 115 postmastectomy breast cancer patients treated for ILRR were included. Of the patients, 98 underwent comprehensive locoregional treatment (local tumor excision plus postoperative radiotherapy), and 17 received definitive radiotherapy alone. Involved-field radiotherapy was given to 69 patients, whereas entire-field radiotherapy (both involved-field and elective-field, involving the chest wall and regional lymphatics) was given to 46 patients. Systemic therapy consisting of hormone therapy, chemotherapy, or both was given to 69% of patients.


RESULTS
Patients treated with comprehensive locoregional treatment had a significantly better 5-year invasive disease-free survival (IDFS) and overall survival (OS) after ILRR than patients treated with definitive radiotherapy alone (IDFS rate, 51% vs. 16%, p = 0.006; OS rate, 62% vs. 37%, p = 0.017). Patients with the most comprehensive locoregional treatment (recurrent tumor excision and entire-field radiotherapy) and systemic therapy had a significantly better 5-year IDFS and OS than patients given either treatment or neither treatment (IDFS rate, 52% vs. 39%, p = 0.011; OS rate, 63% vs. 50%, p = 0.026). Multivariate analysis revealed that positive axillary lymph nodes, Grade III tumor, negative estrogen and progesterone receptor status at primary diagnosis, disease-free interval of less than 2 years, and less comprehensive locoregional treatment were significantly associated with worse IDFS and OS.


CONCLUSIONS
Use of comprehensive locoregional therapy and systemic therapy can achieve good survival outcome in a substantial proportion of postmastectomy patients with ILRR.
Kuo
Sung-Hsin
SH
Department of Oncology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
Huang
Chiun-Sheng
CS
Kuo
Wun-Hon
WH
Cheng
Ann-Lii
AL
Chang
King-Jeng
KJ
Chia-Hsien Cheng
Jason
J
D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000401:mortality / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery*; D003037:Cobalt Radioisotopes / Q000627:therapeutic use; D003131:Combined Modality Therapy; D018572:Disease-Free Survival; D005260:Female; D006801:Humans; D008197:Lymph Node Excision; D008207:Lymphatic Metastasis / Q000473:pathology; D008297:Male; D015411:Mastectomy, Modified Radical / Q000009:adverse effects / Q000379:methods*; D015412:Mastectomy, Segmental; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000188:drug therapy / Q000473:pathology / Q000601:surgery; D010315:Particle Accelerators; D011379:Prognosis; D018714:Radiotherapy, Adjuvant / Q000379:methods; D015996:Survival Rate
D003037:Cobalt Radioisotopes