Randomized prospective phase II trial of two schedules of sorafenib daily and interferon-α2a (IFN) in metastatic renal cell carcinoma (RAPSODY): GOIRC Study 0681

5100

Background: Sorafenib is an oral multi-kinase inhibitor with a demonstrated efficacy in MRCC (Eisen, ASCO 2006). IFN is a pleiotropic molecule with an antiangiogenic activity probably dose and schedule-dependent (Folkman, 1992). Aim of this study was to evaluate the activity and safety of sorafenib combined with IFN in two different schedules. Methods: Eligible patients had metastatic renal cell carcinoma (MRCC) with a clear cell component = 50%, previous nephrectomy, ECOG Performance Status 0–2, no cerebral metastases or previous treatment, measurable disease; any Motzer’s score was allowed. Patients received oral sorafenib 400mg BID continuously plus sc IFN, 9 MU three times a week (arm-A) or 3 MU five times a week (arm-B), started 7 days after sorafenib to increase compliance. Planned sample size of this single-stage study was 100 cases to be enrolled over 18 months. Primary end points: Progression Free Survival (PFS) in the two arms and safety; secondary end-points: overall response (intention-to treat analysis) and overall survival. Results: Between January 2006 and January 2007 all the expected cases were enrolled into the study (median age 63 years, range 34–82; male/female: 71/29). Of 63 patients for whom a post baseline assessment was available (31 in arm A and 32 in arm B), 16 achieved a partial response (25.4%: 29% in arm A, 95% CI 13.2–44.9 and 22% in arm B, 95% CI 7.6–36.2), 26 had a stable disease (41.3%: 29% in arm A and 53% in arm B) and 21 progressed (33.3%: 42% in arm A and 25% in arm B). Due to the short follow-up period PFS data are not yet available. The most common grade 3/4 toxicities affecting more than 5% of the pts were equally distributed between arms except for fatigue and skin rash (respectively 19% and 8%, only arm A): hypophosphatemia (43%), hand-foot syndrome (22%), anorexia, stomatitis, hyperamylasemia (11% each), diarrhea (8%) and hyperlipasemia (5%). Conclusions: With an overall response rate of 25.4% and a tumor control rate (partial response + stable disease) of 66.7% (58.1% in arm A, 95% CI 40.7–75.5 and 75.0% in arm B, 95% CI 60.0–90.0; p = ns) sorafenib plus IFN can be considered a promising regimen in MRCC. Further investigations of the active and safe low-dose IFN combination arm are warranted.

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[Posterior mediastinum neoplasms: a case of schwannoma]

The Authors report the case of a 33-year-old male affected with an asymptomatic schwannoma of the posterior mediastinum, and review the relevant Literature, discussing the difficulties in making the differential diagnosis of the posterior mediastinum lesions, particularly in the pre-clinical phase. Neurogenic tumors represent about 75 percent of all tumors of mediastinum and about one third of all tumors of the mediastinum. They can originate from the peripheral nervous system group, from the sympathetic nervous system group or, in rare cases, from the vagus nerve. In adult patients, they are usually found by chance during radiographic examination of the thorax, and they are usually asymptomatic and benign. During preoperative evaluation, a magnetic resonance examination of rachis should be done to exclude the possibility of intraspinal involvement. If there are no contraindications, the treatment of choice should be surgical resection by means of thoracoscopy or thoracotomy, when size and location of the tumors allow it in order to prevent malignant evolution.