A pilot clinical trial testing mutant von Hippel-Lindau peptide as a novel immune therapy in metastatic renal cell carcinoma.

BACKGROUND: Due to the lack of specific tumor antigens, the majority of tested cancer vaccines for renal cell carcinoma (RCC) are based on tumor cell lysate. The identification of the von Hippel-Lindau (VHL) gene mutations in RCC patients provided the potential for developing a novel targeted vaccine for RCC. In this pilot study, we tested the feasibility of vaccinating advanced RCC patients with the corresponding mutant VHL peptides. METHODS: Six patients with advanced RCC and mutated VHL genes were vaccinated with the relevant VHL peptides. Patients were injected with the peptide mixed with Montanide subcutaneously (SQ) every 4 weeks until disease progression or until the utilization of all available peptide stock. RESULTS: Four out of five evaluable patients (80%) generated specific immune responses against the corresponding mutant VHL peptides. The vaccine was well tolerated. No grade III or IV toxicities occurred. The median overall survival (OS) and median progression-free survival (PFS) were 30.5 and 6.5 months, respectively. CONCLUSIONS: The vaccine demonstrated safety and proved efficacy in generating specific immune response to the mutant VHL peptide. Despite the fact that the preparation of these custom-made vaccines is time consuming, the utilization of VHL as a vaccine target presents a promising approach because of the lack of other specific targets for RCC. Accordingly, developing mutant VHL peptides as vaccines for RCC warrants further investigation in larger trials. TRIAL REGISTRATION: 98C0139.

Gemcitabine-associated large vessel vasculitis presenting as fever of unknown origin.

Gemcitabine is a nucleoside analogue used for treatment of multiple cancers. Recent reports describe small to medium vessel vasculitis as a rare complication of therapy. We report a case of significant large vessel vasculitis presenting as fever of unknown origin in a patient treated adjuvantly with docetaxel and gemcitabine for uterine leiomyosarcoma.The patient presented after her first and second exposure to chemotherapy with fever of unknown origin and worsening subsequent chest and neck discomfort. Extensive workup revealed radiographic and laboratory evidence of aortic vasculitis. We initiated treatment with high-dose corticosteroids, and the patient's condition resolved without complication over the next several weeks.To our knowledge, this represents the first case of gemcitabine-induced large vessel vasculitis which presented in our case as fever of unknown origin. Awareness of this potential complication is essential as discontinuing the inciting drug and initiating corticosteroid treatment can be life-saving.

Intraperitoneal bevacizumab for the palliation of malignant ascites in refractory ovarian cancer.

BACKGROUND: Malignant ascites often has a profound impact on the quality of life of patients with refractory ovarian cancer. Current treatments, including dietary, medical, and procedural are often temporary and unsatisfactory options in patients approaching the end of life. CASE: We present a case of an 88 year-old receiving home hospice care with refractory ovarian cancer and severe symptomatic ascites. We performed a paracentesis and treated her with intraperitoneal bevacizumab with dramatic improvement in her ascites and the quality of her final weeks of life. CONCLUSION: Intraperitoneal bevacizumab may be a useful tool in the palliation of malignant ascites and is worthy of further study.