Capecitabine plus gemcitabine in thymic epithelial tumors: final analysis of a Phase II trial.

BACKGROUND: A multi-institutional Phase II trial was initiated in 2005 to test the combination gemcitabine and capecitabine in patients with thymic epithelial malignancies (TETs). PATIENTS & METHODS: Patients with histologic confirmation of TET diagnosis by central review who had received >1 systemic chemotherapy treatment were included. Patients received oral capecitabine (650 mg/mq twice daily on days 1-14) and intravenous gemcitabine (1000 mg/mq on days 1 and 8 every 3 weeks). RESULTS: Of the 30 patients included (18 men, 12 women; median age: 57 years, range: 48-61 years), the majority (73%) had thymoma, and the remaining thymic carcinoma. Eight patients developed grade 3-4 neutropenia. A total of 12 patients had a response. Median progression-free survival was 11 months (range: 6.5-16.5). CONCLUSION: Capecitabine and gemcitabine is highly active in TETs.

Cellular and humoral immune alterations in thymectomized patients for thymoma.

The aim of this study was to analyze the impact of thymectomy on kinetics of the immune reconstitution in thymoma patients. Nine consecutive patients with completely resected thymoma were enrolled. Immunophenotype analysis (total lymphocytes, CD3, CD4, CD8, CD19, NK subsets) and detection of autoantibodies at 6, 12, 18, and 24 months after thymectomy were planned. A prolonged inversion of CD4/CD8 ratio was present, due to a diminished number of CD4+ cells; CD8+ cell numbers remaining constantly normal at different time points; CD19+ cells remained for a long time understatement, achieving almost normal levels at 24 months; and NK cells always showed a normal amount. Autoantibodies against the muscle acetylcholine receptor were detected in four patients (44.4%) at the time of diagnosis, while antinuclear antibody were detected in eight patients (88.8%) at different time points during postthymectomy. A high incidence of multiple primary neoplasms was observed (66.6% of cases). Our study showed that cellular and humoral immune alterations are a common sequelae of postthymectomy. Further studies, a longer surveillance and a cooperative approach, due to the rarity of the disease, are necessary to define eventual implications of immune alterations on patient's outcome.

Additional molecular and clinical evidence open the way to definitive IARC classification of the BRCA1 c.5332G > A (p.Asp1778Asn) variant.

OBJECTIVES: In silico splicing analysis, a mini-gene assay and splicing data, obtained using RNA from blood samples, have shown that the BRCA1 c.5332G > A variant induces exon 21 skipping. However, despite these evidences, up to date, this variant is unclassified. The aim of this study is to provide further molecular and clinical evidence for the BRCA1 c.5332G > A variant in a patient with high grade serous ovarian carcinoma (HGSOC) to allow a definitive classification of this variant. DESIGN AND METHOD: The effect of the BRCA1 c.5332G > A variant on RNA splicing was evaluated by amplifying regions of BRCA1 from the cDNA of the patient. Loss of heterozygosity (LOH) in tumor tissue was also investigated. RESULTS: The c.5332G > A allele causes significantly aberrant splicing of the BRCA1 exon 21. Evaluation of the c.5332A allele in tumor tissue highlights a possible loss of heterozygosity, supporting her pathogenic effect. CONCLUSIONS: Our results regarding the c.5332G > A variant confirm that it contributed to predisposition and onset of ovarian carcinoma in the patient. We propose to classify this variant as 'likely-pathogenic' (class IV).

The unmet need for oncofertility preservation in women: Results of a survey by different oncological specialists in Lazio, Italy.

In recent years, we have witnessed a growing interest in the prevention of the loss of reproductive efficacy in young women as a result of cancer or its treatments. Indeed, recent studies have shown that loss of fertility impacts deeply on young women and sometimes may be even more stressful than the cancer diagnosis itself. In fact, the risk of treatment-associated infertility and premature menopause is a major concern for patients. Nevertheless, the approach to fertility preservation in women diagnosed with cancer is far from being standardized, and counseling strategies are poorly adopted in clinical practice. In Italy, the federal structure of public health makes it difficult to refer patients to local referral centers experienced in fertility preservation. In particular, a need exists to identify oncologists in the Lazio region specialized in fertility preservation and those facilities who are able to counsel patients regarding their sexuality. For these reasons, the Lazio section of Italian Association of Medical Oncology has led an oncofertility and oncosexuality survey to assess deficiencies in the path to start fertility preservation procedures and to help patients with cancer-related sexual problems. In total, 273 healthcare providers participated in the survey. Overall, the participants had a low interest in their patients' infertility problems, which led to a poor referral of patients to fertility preservation centers. This behavior demonstrated by healthcare providers is attributed to the necessity to rapidly start oncological treatments, the lack of knowledge of referral centers, and the little experience in tackling the subject with the patients. The interviewees also recognize communication difficulties related to lack of information on issues, absence of rehabilitations paths, and embarrassment.

Diagnostic features and subtyping of thymoma lymph node metastases.

AIM: The purpose of the present study was to characterize the morphological features of thymoma metastases in lymph nodes and to evaluate the possibility of their subtyping according to the 2004 WHO classification of thymus tumors. MATERIALS AND METHODS: We reviewed 210 thymoma cases in our series of thymic epithelial tumors (TET), including their recurrences and lymphogenous metastases. Three cases of lymph node metastases, one case occurring synchronously with the primary tumor and one synchronously with the first relapse (both in intrathoracic location) and one case of metastasis observed in a laterocervical lymph node subsequently to two thymoma relapses were found. RESULTS: The metastatic nodes were variably but extensively involved in all cases. The histological features were similar in both primary tumors and metastases. Thymoma metastases were subtyped according to the WHO classification as B3 (one case) and B2 (two cases), and distinctive features in comparison to metastatic epithelial neoplasias from other sites were observed. CONCLUSION: Thymoma lymph node metastases, although rare, can be subtyped according to the WHO classification on the basis of their morphological and immunohistochemical features. Clinically, the presence of nodal metastases may herald subsequent relapses and further metastases even in extrathoracic sites.

Thymic epithelial tumors express vascular endothelial growth factors and their receptors as potential targets of antiangiogenic therapy: a tissue micro array-based multicenter study.

OBJECTIVES: Tumor angiogenesis is an essential and complex process necessary for the growth of all tumors which represents a potential therapeutic target. Angiogenesis inhibitors targeting vascular endothelial growth factor (VEGF) or their receptor tyrosine kinases have been approved by the FDA. In thymic epithelial tumors (TET), targeted therapies have been sporadically applied due to their rarity. To ascertain the presence of potential therapeutic targets, we analyzed by immunohistochemistry the expression of angiogenesis-related biomarkers in a large series of TET arranged in Tissue Micro Arrays (TMA). MATERIALS AND METHODS: We assessed by immunohistochemistry the expression of the possible molecular target of anti-angiogenic therapy, i.e. VEGFA, VEGFC, VEGFD, VEGFR1, VEGFR2, VEGFR3, and PDGFRß, in a TMA series of 200 TET collected in the framework of a multi-institutional collaborative project for Rare Diseases. RESULTS: When compared to the low-risk tumors, high-risk TET (B2, B3, carcinomas) contained higher proportion of cancer cells expressing VEGFA, VEGFC and VEGFD (P<0.001, P<0.001, and P<0.001) growth factors, and their receptors VEGFR1 (P=0.002), VEGFR2 (P=0.013), and VEGFR3 (P=0.041). No differences were observed in terms of PDGFRß expression. CONCLUSIONS: According to our data, it is possible to hypothesize the existence of multiple paracrine and/or autocrine loops in TET, particularly in the high-risk ones, involved in TET growth and progression. Anti-angiogenic agents, directed to inhibit these loops, are therefore to be considered as potential tools in advanced TET therapy.

Imatinib mesylate in thymic epithelial malignancies.

PURPOSE: Thymic epithelial tumors (TETs) are rare tumors of the mediastinum, with an estimated incidence of about 3 cases per 100,000 inhabitants. Although anthracycline- and platinum-based chemotherapy is an active treatment for TETs, novel systemic therapeutic options are especially needed for metastatic disease, which is virtually incurable. On the basis of the radiographic response obtained with imatinib (Novartis Pharma, Basel, Switzerland) in a patient with thymic carcinoma harboring the V560del c-KIT mutation, a phase II trial was initiated at the Department of Molecular and Clinical Oncology and Endocrinology of University "Federico II of Naples" with the purpose to test imatinib in TETs. METHODS: Imatinib was daily delivered at the dose of 400 mg to patients affected by TETs, who had progressed after at least one chemotherapy regimen. Positivity of c-KIT on immunohistochemistry was not mandatory for study entry. Radiographic responses were measured by CT scans performed every 3 months, according to the RECIST criteria. Toxicity was graded according to the Common Toxicity Criteria of the National Cancer Institute, version 3.0. RESULTS: Fifteen patients with advanced TETs were enrolled from March 2008 to May 2010. Three patients presented with thymic carcinomas. Two of these three patients presented c-kit expression on immunohistochemistry. No patient harbored a known c-kit activating mutation. Imatinib was very well tolerated, with no toxicity-related death. Diarrhea and migraine were the most frequent events, occurring both in 20% of patients, but were manageable and mild. No radiographic responses were recorded. Median progression-free survival was 3 months (interquartile range, 2.5-4). Median overall survival was not reached. The study was terminated before it reached its target accrual of 42 patients, because of the lack of responses and low accrual rate. CONCLUSIONS: This trial indicates the lack of effectiveness of imatinib in unselected patients with thymic epithelial tumors. Nevertheless, imatinib may represent a valuable option in selected patients with TETs, such as those harboring the V560del c-KIT mutation.