Is pegfilgrastim safe and effective in congenital neutropenia? An analysis of the French Severe Chronic Neutropenia registry.

AIMS: To examine the efficacy and safety of pegfilgrastim in patients with congenital neutropenia (CN). METHODS: Seventeen patients enrolled in the French Severe CN Register received pegfilgrastim. RESULTS: Median age at pegfilgrastim introduction was 19.1 years (range 3.9-52.3 years). In 14 cases pegfilgrastim replaced GCSF (filgrastim or lenograstim), after a median of 6.9 years of GCSF therapy. The dose of pegfilgrastim was usually one full vial per injection (except in five children, who received 1/6 to 1/2 a vial), resulting in a dose of between 50 and 286 microg/kg. The pegfilgrastim schedule ranged from two injections every 7 days to one injection every 30 days, with treatment-free periods. The median interval between the first and last dose of pegfilgrastim was 0.8 years (0.01-4.1 years). The absolute neutrophil count tended to increase more strongly on pegfilgrastim than on GCSF, but the difference was not statistically significant. During pegfilgrastim therapy, a severe infection occurred in two patients and recurrent ENT infections in two other patients. Bone pain was reported by nine patients, anemia and thrombocytopenia occurred in one patient (WHO grade III), chronic urticaria occurred in one patient (WHO grade III), and a single pegfilgrastim injection was followed by respiratory distress and death 15 days later in a patient with GDSIb. At the last update, 10 patients had stopped receiving pegfilgrastim and seven patients were still receiving pegfilgrastim. CONCLUSION: Compared to conventional GCSF, pegfilgrastim is more difficult to use in congenital neutropenia, with more frequent adverse events and sometimes poor efficacy.

Complete remission with tyrosine kinase inhibitors in renal cell carcinoma.

PURPOSE: Complete remission (CR) is uncommon during treatment for metastatic renal cell carcinoma (mRCC) with tyrosine kinase inhibitors (TKIs), but it may occur in some patients. It remains a matter of debate whether therapy should be continued after CR. METHODS: A multicenter, retrospective analysis of a series of patients with mRCC who obtained CR during treatment with TKIs (sunitinib or sorafenib), either alone or with local treatment (surgery, radiotherapy, or radiofrequency ablation), was performed. RESULTS: CR was identified in 64 patients; 36 patients had received TKI treatment alone and 28 had also received local treatment. Most patients had clear cell histology (60 of 64 patients), and all had undergone previous nephrectomy. The majority of patients were favorable or intermediate risk; however, three patients were poor risk. Most patients developed CR during sunitinib treatment (59 of 64 patients). Among the 36 patients who achieved CR with TKI alone, eight continued TKI treatment after CR, whereas 28 stopped treatment. Seventeen patients who stopped treatment (61%) are still in CR, with a median follow-up of 255 days. Among the 28 patients in CR after TKI plus local treatment, 25 patients stopped treatment, and 12 of these patients (48%) are still in CR, with a median follow-up of 322 days. CONCLUSION: CR can occur after TKI treatment alone or when combined with local treatment. CR was observed at every metastatic site and in every prognostic group.

Docetaxel plus gemcitabine in recurrent and/or metastatic squamous cell carcinoma of the head and neck: a phase II multicenter study.

OBJECTIVES: This phase II study was conducted to assess the efficacy of docetaxel plus gemcitabine in locally recurrent and/or metastatic squamous cell carcinoma of the head and neck. PATIENTS AND METHODS: Forty patients with pharynx or larynx cancer were included and treated with an intravenous infusion of docetaxel 75 mg/m2 on day 8 and gemcitabine 1000 mg/m2 day 1 and day 8 every 3 weeks for 6 cycles. RESULTS: Among the 40 patients included, 17 had metastatic disease and 18 had received prior chemotherapy. Thirty-two patients were assessable for response. The overall response rate was 20.0% (95% confidence interval [CI], 9.0%-35.7%), with 8 (20.0%) partial responses. Thirteen patients (32.5%) had stable disease, whereas 11 patients (27.5%) had progressive disease. The median response duration was 6.5 months (95% CI, 5.8-7.2). Grade 3 or 4 neutropenia was observed in 18 patients (45.0%). Three treatment-related deaths due to infection were reported. CONCLUSION: The docetaxel and gemcitabine combination is an active treatment of recurrent or metastatic head and neck cancer. However, this regimen is associated with a high hematologic toxicity. A new schedule of administration must be explored.