Hyperthermic intraperitoneal chemotherapy with oxaliplatin as treatment for peritoneal carcinomatosis arising from the appendix and pseudomyxoma peritonei: a survival analysis
Why this work is in the frame
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Bibliographic record
Abstract
BACKGROUND: Appendiceal peritoneal carcinomatosis (PC) is rare and its long-term prognosis is poor. The aim of this study was to evaluate the results of an aggressive treatment approach used in our institution for the last eight years. METHODS: Data from all patients with PC arising from the appendix were prospectively collected and analyzed. Treatment consisted of complete surgical cytoreduction (CRS), followed by hyperthermic intraperitoneal chemotherapy (HIPEC) with oxaliplatin (460 mg/m2) at 43°C over 30 minutes. Ronnett's histologic classification was used for tumor grading. RESULTS: Between February 2003 and April 2011, 78 patients underwent laparotomy with curative intent. The mean follow-up period was 33.7 months. A total of 58 patients received HIPEC, but 11 patients could not have CRS and received no HIPEC. Nine patients with a negative second-look surgery also received no HIPEC. The five-year overall survival for the entire cohort was 66.2%; 100% for the negative second-look patients, 77% for the HIPEC patients and 9% for the unresectable patients (P<0.0001). A total of 15 patients (25.9%) had isolated peritoneal recurrence, no patient had visceral recurrence only, and five patients (8.6%) had both. In regards to the five-year disease-free survival for the HIPEC patients, histologic grade (disseminated peritoneal adenomucinosis 100%, peritoneal mucinous carcinomatosis with intermediate features 40%, peritoneal mucinous carcinomatosis 20%; p=0.0016) and completeness of cytoreduction (CCR-0 56%, CCR-1 24%; P=0.0172) were prognostic factors. There was one postoperative mortality. The major complication rate for patients treated with HIPEC was 40%, including intra-abdominal abcess (17%), hemorrhage (12%) and anastomotic leak (10%). One patient in the HIPEC group experienced temporary grade II neuropathy and grade III thrombocytopenia. CONCLUSIONS: This therapeutic approach seems both feasible and safe in selected patients. Recurrence is, however, frequent and represents a challenge.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it