Constitutional ring chromosome 11 mosaicism in a Wilms tumor patient: Cytogenetic, molecular and clinico-pathological studies.

We report on a boy with three cell lines: 46,XY, r(11)(p15.5,q25)[90]/45,XY,-11 [8]/47,XY, r(11)(p15.5,q25)x2[2], with minor anomalies and mental retardation who developed asynchronous bilateral Wilms tumors (WTs). Array comparative genomic hybridization (CGH) performed on peripheral blood leukocytes of the patient led to the identification of a constitutional duplication of 4.8 Mb at 11p15.5-11p15.4. This duplication was found to involve the chromosome of paternal origin, and occurred in tandem on the ring chromosome 11. Despite the constitutive duplication of the paternal 11p15 chromosome region, the patient showed no sign of Beckwith-Wiedemann syndrome. However, the molecular characterization of the two neoplasias was consistent with their independent origin and showed that they arose from the two distinct cellular clones with the ring chromosome, indicating that this anomaly is likely to have caused the patient's susceptibility to WT development.

Breast metastases in children and adolescents with rhabdomyosarcoma: Experience of the Italian Soft Tissue Sarcoma Committee.

BACKGROUND: Breast metastasis from rhabdomyosarcoma (RMS) is an uncommon event but may be problematic in treatment decision-making. Aim of the study was to evaluate clinical characteristics, treatment, and subsequent outcome, of patients with RMS metastasis in the breast, enrolled in four consecutive Associazione Italiana di Ematologia ed Oncologia Pediatrica (AIEOP) Soft Tissue Sarcoma Committee protocols during the last 20 years, in order to obtain information to establish a more adequate diagnostic and therapeutic approach. PROCEDURES: Data were derived from the AIEOP STSC database and reviewed for the purpose of this study. RESULTS: From 1988 to 2008, among 189 patients with metastatic RMS, we identified 7 (3.7%) patients with RMS with breast involvement at diagnosis. All patients were females, aged 13-17 years with alveolar histology and multiple metastasis sites (2-5). The primary tumor was located in the extremities in 3/7 patients. In spite of intensive treatment no patient survived. The cause of treatment failure was distant relapse in six patients, including two on the mammary region. Treatment data analysis revealed that local measures to control breast lesions were used in only two patients. CONCLUSIONS: Our data suggest that investigations of the mammary region should be part of the usual diagnostic workup in adolescent girls with alveolar RMS, especially if the primary tumor arises in the extremities. New and more effective strategies are needed to improve the outcome of these patients including aggressive local measures to control breast disease.

Biliary tract rhabdomyosarcoma: a report from the Soft Tissue Sarcoma Committee of the Associazione Italiana Ematologia Oncologia Pediatrica.

INTRODUCTION: Rhabdomyosarcoma is a soft tissue malignant musculoskeletal tumor frequent in children. Biliary duct localization is extremely rare, but it is the most common cause of malignant obstructive jaundice in pediatric patients. METHODS: This report describes a series of 10 patients under 18 years of age with biliary tract rhabdomyosarcoma who were enrolled, from 1979 to 2004, in 3 consecutive Italian pediatric cooperative protocols that had been drawn up by the Soft Tissue Sarcoma Committee of the Associazione Italiana Ematologia Oncologia Pediatrica (AIEOP). RESULTS: Considering initial and delayed surgery, tumor resection was achieved in 7 cases, 3 complete with free margins (2 liver transplants) and 4 with microscopic residual disease. Chemotherapy was given to all patients and radiotherapy to 3. At present, 5 patients survive in complete remission 90-200 months after diagnosis while 4 died of disease progression or relapse and 1 of liver transplant-related complications. CONCLUSIONS: Better outcomes in this series were associated with the feasibility of conservative surgery due to the favorable location of the tumor, in particular in the common bile duct. Chemotherapy and radiotherapy might obviate the need for demolitive surgery or liver transplant, which were linked to worse outcomes in our series.

Perioperative management of hypertensive neuroblastoma: A study from the Italian Group of Pediatric Surgical Oncologists (GICOP).

BACKGROUND: Hypertension (HT) is rarely reported in patients affected by Neuroblastoma (NB), and management guidelines are lacking. Clinical features and perioperative medical treatment in such patients were reviewed to 1) ascertain whether a shared treatment strategy exists among centers and 2) if possible, propose some recommendations for the perioperative management of HT in NB patients. METHODS: A retrospective multicenter survey was conducted on patients affected by NB who presented HT symptoms. RESULTS: From 2006 to 2014, 1126 children were registered in the Italian Registry of Neuroblastoma (RINB). Of these, 21 with HT (1.8%) were included in our analysis. Pre- and intraoperative HT management was somewhat dissimilar among the participating centers, apart from a certain consistency in the intraoperative use of the alpha-1 blocker urapidil. Six of the 21 patients (28%) needed persistent antihypertensive treatment at a median follow-up of 36months (range 4-96months) despite tumor removal. Involvement of the renal pedicle was the only risk factor constantly associated to HT persistency following surgery. A correlation between the presence of HT and the secretion of specific catecholamines and/or compression of the renal vascular pedicle could not be demonstrated. CONCLUSION: Based on this retrospective review of NB patients with HT, no definite therapeutic protocol can be recommended owing to heterogeneity of adopted treatments in different centers. A proposal of perioperative HT management in NB patients is however presented. LEVEL OF EVIDENCE: IV.