Araştırma Çıktıları

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Subject: search.filters.subject.Neoadjuvant chemoradiotherapy

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    Neoadjuvant hyperfractionated accelerated radiotherapy plus concomitant 5-fluorouracil infusion in locally advanced rectal cancer: A phase. study
    (BAISHIDENG PUBLISHING GROUP INC, 2018-01-01) Gural, Zeynep; Saglam, Sezer; Yucel, Serap; Kaytan-Saglam, Esra; Asoglu, Oktar; Ordu, Cetin; Acun, Hediye; Sharifov, Rasul; Onder, Semen; Kizir, Ahmet; Oral, Ethem N.
    AIM To evaluate the efficacy and tolerability of neoadjuvant hyperfractionated accelerated radiotherapy (HART) and concurrent chemotherapy in patients with locally advanced infraperitoneal rectal cancer. METHODS A total of 30 patients with histopathologically confirmed T2-3/N0+ infraperitoneal adenocarcinoma of rectum cancer patients received preoperative 42 Gy/1.5 Gy/18 days/bid radiotherapy and continuous infusion of 5-fluorouracil (325 mg/m(2)). All patients were operated 4-8 wk after neoadjuvant concomitant therapy. RESULTS In the early phase of treatment, 6 patients had grade III- IV gastrointestinal toxicity, 2 patients had grade III-IV hematologic toxicity, and 1 patient had grade V toxicity due to postoperative sepsis during chemotherapy. Only 1 patient had radiotherapy-related late side effects, i.e., grade IV tenesmus. Complete pathological response was achieved in 6 patients (21\%), while near-complete pathological response was obtained in 9 (31\%). After a median follow-up period of 60 mo, the local tumor control rate was 96.6\%. In 13 patients, distant metastasis occurred. Disease-free survival rates at 2 and 5 years were 63.3\% and 53\%, and corresponding overall survival rates were 70\% and 53.1\%, respectively. CONCLUSION Although it has excellent local control and complete pathological response rates, neoadjuvant HART concurrent chemotherapy appears to not be a feasible treatment regimen in locally advanced rectal cancer, having high perioperative complication and intolerable side effects. Effects of reduced 5-fluorouracil dose or omission of chemotherapy with the aim of reducing toxicity may be examined in further studies.
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    Persistent extramural vascular invasion positivity on magnetic resonance imaging after neoadjuvant chemoradiotherapy predicts poor outcome in rectal cancer
    (ELSEVIER SINGAPORE PTE LTD, 2021-01-01) Guner, Osman Serhat; Tumay, Latif Volkan
    Background: In rectal cancer, extramural vascular invasion (EMVI) is the presence of tumour cells in blood vessels outside the muscular layer, which is associated with poor prognosis. Regression of EMVI on MRI following neoadjuvant chemoradiotherapy or its persistence may have prognostic implications. Methods: This retrospective study included 52 patients with rectal cancer who underwent total mesorectal excision following long-course neoadjuvant chemoradiotherapy (CRT). EMVI assessments were done on previous pelvic MRIs obtained before neoadjuvant CRT and eight weeks after the completion of neoadjuvant chemoradiotherapy in initially EMVI positive cases. Results: Persistently EMVI positive patients had worse overall survival and disease-free survival compared to initially EMVI negative patients and patients who returned to negative (p < 0.001 for both). Multivariate analysis identified persistent EMVI positivity after neoadjuvant treatment (HR, 102.9