Summary:The purpose of this study was to determine outcomes for 56 patients with inflammatory breast cancer (IBC) receiving high-dose chemotherapy (HDC) with cyclophosphamide, thiotepa and carboplatin (CTCb) with peripheral blood stem cell (PBSC) support. All patients received the same total amount of chemotherapy but there were differences in the sequence of therapy: 15 received induction chemotherapy, chemotherapy mobilization of PBSC and CTCb after surgery (adjuvant group) while 41 received induction chemotherapy with (n = 17) or without (n = 24) chemotherapy for mobilization of PBSC prior to surgery and CTCb after surgery (neoadjuvant group). Median time from diagnosis to HDC was 5.5 months (range 3.5-12.5). Fifty-one patients (91%) required admission to the hospital following HDC for a median of 11 days (range 5-25). There were two (4%) infectious deaths after HDC. Twenty-four patients (43%) have relapsed at a median of 18 months (range 8-50) from diagnosis resulting in death in 34%. The probabilities of overall (OS) and event-free survival (EFS) at 3 years for all 56 patients were 0.72 and 0.53, respectively, with a median followup of 44 months (range 15-76) from diagnosis. There were no differences in OS, EFS or patterns of relapse between patients in the adjuvant or neoadjuvant groups. These sequences of combined modality therapy incorporating HDC are comparable or superior to other intensive approaches for the treatment of IBC. Further improvements will be necessary to decrease systemic recurrences. Keywords: high-dose therapy; inflammatory breast cancer Multi-modality therapy is now the standard of care for patients with inflammatory breast cancer (IBC). 1,2 The usual sequence of treatment involves induction chemotherapy followed by surgery, radiation therapy, further chemotherapy and hormonal therapy resulting in 5 year event-free survivals (EFS) of approximately 30%. 1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] The use of induction chemotherapy and local-regional radioCorrespondence: Dr CD Buckner, Response Oncology, Inc., 600 Broadway, Suite 112, Seattle, WA 98122, USA Received 18 January 1999; accepted 15 April 1999 therapy has decreased local progression of disease but the majority of patients relapse at distant sites making eradication of microscopic metastatic disease the major challenge.The potential value of high-dose chemotherapy (HDC) with hematopoietic stem cell support in patients with operable high-risk stage II-III non-inflammatory breast cancer has been reported. [19][20][21][22][23][24][25][26] Evaluation of HDC with stem cell support in patients with IBC is a logical extension of these studies.Results of autologous bone marrow (BM) transplantation for patients with IBC have been included in summaries of transplant results 27,28 and reported by the International Bone Marrow Transplant Registry. 23,29 Recently, there have been two single-center reports of outcomes for patients with stage IIIB IBC with HDC with BM or peripheral blood stem cell (PBSC) support. 30,31 These s...