title: Radiofrequency thermal treatment with chemoradiotherapy for advanced rectal cancer.
abstract: We previously reported that patients with a clinical complete response (CR) following radiofrequency thermal treatment exhibit significantly increased body temperature compared with other groups, whereas patients with a clinical partial response or stable disease depended on the absence or presence of output limiting symptoms. The aim of this study was to evaluate the correlation among treatment response, Hidaka radiofrequency (RF) output classification (HROC: termed by us) and changes in body temperature. From December 2011 to January 2014, 51 consecutive rectal cancer cases were included in this study. All patients underwent 5 RF thermal treatments with concurrent chemoradiation. Patients were classified into three groups based on HROC: with ≤9, 10-16, and ≥17 points, calculated as the sum total points of five treatments. Thirty-three patients received surgery 8 weeks after treatment, and among them, 32 resected specimens were evaluated for histological response. Eighteen patients did not undergo surgery, five because of progressive disease (PD) and 13 refused because of permanent colostomy. We demonstrated that good local control (ypCR + CR + CRPD) was observed in 32.7% of cases in this study. Pathological complete response (ypCR) was observed in 15.7% of the total 51 patients and in 24.2% of the 33 patients who underwent surgery. All ypCR cases had ≥10 points in the HROC, but there were no patients with ypCR among those with ≤9 points in the HROC. Standardization of RF thermal treatment was performed safely, and two types of patients were identified: those without or with increased temperatures, who consequently showed no or some benefit, respectively, for similar RF output thermal treatment. We propose that the HROC is beneficial for evaluating the efficacy of RF thermal treatment with chemoradiation for rectal cancer, and the thermoregulation control mechanism in individual patients may be pivotal in predicting the response to RF thermal treatment.
authors.affiliation: Division of Surgery, Hidaka Hospital, Gunma 370-0001, Japan.
authors.forename: Hisanori
authors.initials: H
authors.lastname: Shoji
authors.affiliation: Division of Surgery, Hidaka Hospital, Gunma 370-0001, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Motegi
authors.affiliation: Division of Surgery, Hidaka Hospital, Gunma 370-0001, Japan.
authors.forename: Kiyotaka
authors.initials: K
authors.lastname: Osawa
authors.affiliation: Division of Radiology, Hidaka Hospital, Gunma 370-0001, Japan.
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Okonogi
authors.affiliation: Division of Radiology, Hidaka Hospital, Gunma 370-0001, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Okazaki
authors.affiliation: Division of Surgery, Hidaka Hospital, Gunma 370-0001, Japan.
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Andou
authors.affiliation: Department of Oncology Clinical Development, Graduate School of Medicine, Gunma University, Gunma 371-8511, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Asao
authors.affiliation: Department of General Surgical Science, Graduate School of Medicine, Gunma University, Gunma 371-8511, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kuwano
authors.affiliation: Department of Radiation Oncology, Saitama Medical Center, Saitama Medical University, Saitama 350‑8550, Japan.
authors.forename: Takeo
authors.initials: T
authors.lastname: Takahashi
authors.affiliation: Division of Cancer Diagnosis and Cancer Treatment, Hidaka Hospital, Gunma 370-0001, Japan.
authors.forename: Kyoji
authors.initials: K
authors.lastname: Ogoshi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D059248:Chemoradiotherapy; D005260:Female; D006801:Humans; D006979:Hyperthermia, Induced; D007668:Kidney / Q000473:pathology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012004:Rectal Neoplasms / Q000473:pathology / Q000628:therapy*; D012881:Skin Temperature; D016896:Treatment Outcome