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Allen R Chauvenet

Publications and source records attributed to Allen R Chauvenet.

8 recordsLinked to original sources
PubMed2007

Diagnosis of Burkitt lymphoma in pediatric patients by thoracentesis.

The diagnosis of Burkitt lymphoma by thoracentesis has been rarely reported in the literature, particularly in children. From 1995 to 2004, we diagnosed six pediatric patients with mature B-cell neoplasms using thoracentesis as the initial diagnostic procedure. The cytology, immunophenotyping, and cytogenetic results of the pleural fluid cells were consistent with mature B-cell malignancies. We conclude that thoracentesis for the diagnosis of Burkitt lymphoma in children is safe, fast, and accurate. It should be strongly considered as an initial diagnostic procedure for pediatric patients with pleural effusions who are suspected of having B-cell malignancies.

Adolescent↗
PubMed2006

APE chemotherapy for children with relapsed Hodgkin disease: a Pediatric Oncology Group trial.

BACKGROUND: MOPP (mechlorethamine, vincristine, procarbazine, prednisone) and ABVD (doxorubicin, bleomycin, vinblastine, and dacarbazine) are effective therapies for Hodgkin disease (HD) that may cause long-term toxicities in children. APE (cytosine arabinoside, cisplatin, etoposide) is a non-cross-resistant regimen with limited toxicities. We evaluated this regimen for patients with recurrent or refractory disease. METHODS: Patients with recurrent Hodgkin disease who were <or=21 years of age and had previously received standard alkylating agent and doxorubicin-based therapy, were treated with APE chemotherapy (cytosine arabinoside 750 mg/m(2), cisplatin 15 mg/m(2), etoposide 20 mg/m(2)) every 12 hr, administered three or four times per cycle. Response, Event-free survival (EFS), and overall survival (OS) were assessed. RESULTS: Thirty-one patients in first (n = 25) or second (n = 6) relapse of Hodgkin disease were eligible and evaluable. APE chemotherapy was well-tolerated, with the major toxicity consisting of short duration, grade 3/4 hematopoietic toxicity. The CR/PR response rate was 68% (42% CR, 26% PR). Allowing subsequent stem cell transplantation in some patients, 4-year EFS and OS were 27% +/- 8% and 49% +/- 9%, with 8-year EFS and OS of 23% +/- 9% and 34% +/- 10%. DISCUSSION: APE is an efficacious regimen with minimal toxicity. Novel regimens are necessary to: (1) re-induce remission, (2) treat newly diagnosed patients, and (3) augment therapy in patients with slow response to standard regimens. This regimen had minimal toxicity and an excellent response rate that facilitated long term survival, often in conjunction with transplantation. The Children's Oncology Group is using a similar regimen to augment therapy for slow responders on a current Hodgkin disease trial.

Adolescent↗
PubMed2006

POG 8625: a randomized trial comparing chemotherapy with chemoradiotherapy for children and adolescents with Stages I, IIA, IIIA1 Hodgkin Disease: a report from the Children's Oncology Group.

To determine if 6 courses of chemotherapy alone could achieve the same or better outcome than 4 courses of chemotherapy followed by radiation therapy (chemoradiotherapy) in pediatric and adolescent patients with Hodgkin disease. Children < or =21 years old with biopsy-proven, pathologically staged I, IIA, or IIIA1 Hodgkin disease were randomly assigned 6 courses of alternating nitrogen mustard, oncovin, prednisone, and procarbazine/doxorubicin, bleomycin, vinblastine, and dacarbazine (treatment 1) or 4 courses of alternating nitrogen mustard, oncovin, prednisone, and procarbazine/doxorubicin, bleomycin, vinblastine, and dacarbazine +2550 cGy involved-field radiotherapy (treatment 2). The complete response rate was 89%, with a complete response and partial response rate of 99.4%. There was no statistically significant difference in event-free survival (EFS) or overall survival between arms. The EFS for those who achieved an early complete response was significantly higher than for those who did not. For pediatric patients with asymptomatic low-stage and intermediate-stage Hodgkin disease, chemotherapy and chemoradiotherapy both resulted in 3-year EFS of approximately 90% and statistically indistinguishable 8-year EFS and overall survival, without significant long-term toxicity. Early response to therapy was associated with higher EFS, a concept that has led to the Children's Oncology Group paradigm of response-based risk-adapted therapy for pediatric Hodgkin disease.

Adolescent↗
PubMed2005

Central venous lines in children with lesser risk acute lymphoblastic leukemia: optimal type and timing of placement.

PURPOSE: In pediatric patients with acute lymphoblastic leukemia (ALL), the optimal time for central venous line (CVL) insertion and the optimal type of CVL (internal v external) is unclear. This study was undertaken to compare complication rates between early versus late line insertion, and between internal versus external lines in children with lesser risk ALL. PATIENTS AND METHODS: We performed a retrospective analysis of patients enrolled onto Pediatric Oncology Group (POG) protocol 9201. Data regarding demographics, CVL types and insertion dates, blood counts, and complications were reviewed through week 25 of therapy. RESULTS: Of 697 patients enrolled onto POG protocol 9201, 362 patients had sufficient data for analysis. When compared to late line placement (> day 15 of induction), early CVL placement (</= day 15 of induction) was associated with an increased risk of having a positive blood culture (odds ratio, 2.2; 95% CI, 1.0 to 5.0; P = .05). When compared with internal CVLs ("ports"), external CVLs were associated with a positive blood culture (odds ratio, 3.1; 95% CI, 1.3 to 7.5; P = .01), thrombosis (odds ratio, 3.9; 95% CI, 1.5 to 10.3; P = .006), and CVL removal (odds ratio, 5.6; 95% CI, 2.7 to 11.6; P < .001). CONCLUSION: In pediatric patients with lesser risk ALL, internal lines (ports) should be the preferred CVL type due to a lower risk of infectious and thrombotic complications. In addition, CVLs placed early in induction are associated with a higher risk of positive blood culture than those placed later in induction.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed2005

Recent steroid therapy increases severity of varicella infections in children with acute lymphoblastic leukemia.

OBJECTIVE: The varicella-zoster virus (VZV) continues to be a dangerous pathogen to immunocompromised children. Children with acute lymphoblastic leukemia (ALL) are treated with intermittent steroid therapy. This study was undertaken to examine the relationship between steroid therapy for ALL and severity of varicella infection. METHODS: We performed a retrospective review of patients who were on Pediatric Oncology Group Protocol 9201 and had a history of varicella infection. Pediatric Oncology Group 9201 is a phase III study for the treatment of children with lesser risk ALL diagnosed between 1992 and 1999. Cases of varicella were coded 1 to 5 on the basis of severity: grade 1 caused minimal to no symptoms, grade 2 caused mild to moderate symptoms that did not require hospitalization, grade 3 caused symptoms severe enough to require hospitalization and intravenous acyclovir, grade 4 caused severe disease that had complications or that required intensive care, and grade 5 resulted in death. RESULTS: Of 697 enrolled patients, 110 (15.8%) developed primary varicella; 59% of these were male. For analysis, disease grade was dichotomized into nonsevere (grades 1 and 2) and severe (grades 3, 4, and 5). Of the 110 patients, 56 had nonsevere disease; 54 had severe disease, including 2 deaths. Of the patients whose varicella was diagnosed within 3 weeks of receipt of prednisone, 70% had severe infection, whereas only 44% of those who had not received prednisone within 3 weeks had severe infection. The odds ratio for having a severe infection within 3 weeks of prednisone versus >3 weeks is 2.9 (95% confidence interval: 1.1-7.9). By multivariate analysis, older age at ALL diagnosis, years from ALL diagnosis to VZV diagnosis, and VZV diagnosis within the 4-week period of interest (during or within 3 weeks of prednisone therapy) all were independently associated with an increased risk for severe infection. CONCLUSIONS: This study represents the largest study to date of varicella in children with ALL and provides convincing evidence that prednisone therapy during the VZV incubation period significantly increases the risk for developing severe varicella infection. In addition, older age is associated with more severe infection. Despite the varicella vaccine and a dropping incidence of primary infections, VZV remains a dangerous pathogen for pediatric patients with ALL. With the possible exception of induction therapy, patients who are on ALL therapy and are exposed to varicella should have steroid therapy delayed until after the VZV incubation period. These findings may have implications for other diseases that are treated with corticosteroids.

Chickenpox↗
PubMed2003

Religiosity is associated with the use of complementary medical therapies by pediatric oncology patients.

PURPOSE: To determine the prevalence of complementary and alternative medicine (CAM) use in pediatric oncology patients, the types of CAM used, and the factors associated with the use of CAM. PATIENTS AND METHODS: A questionnaire regarding CAM use was administered to patients/families seen in the pediatric oncology clinic at Wake Forest University Baptist Medical Center over a 12-month period. RESULTS: Based on 195 completed questionnaires, 91 (47%) patients reported use of CAM since diagnosis. Among CAM users, the most commonly used CAM therapies were faith healing, megavitamins/minerals, massage, other dietary supplements, relaxation techniques, and herbal medicines/teas. Forty-one percent of CAM users had not discussed CAM use with their physician(s). In bivariate analysis, CAM use was not associated with age at the time of survey, time since diagnosis, sex, race, parental education, or family income. A trend was noted between CAM use and older age at diagnosis. Families who reported themselves to be "very" religious were more likely to use CAM than those that are "somewhat" or "not at all" religious. CONCLUSIONS: Use of CAM is common among pediatric oncology patients and often is not discussed with the treating physician(s). Patients from very religious families are more likely to use CAM.

Child↗
PubMed2003

Vincristine-induced neuropathy as the initial presentation of charcot-marie-tooth disease in acute lymphoblastic leukemia: a Pediatric Oncology Group study.

PURPOSE: After profound peripheral neurotoxicity during induction chemotherapy for acute lymphoblastic leukemia (ALL) in the index patient with Charcot-Marie-Tooth hereditary neuropathy (CMT), study coordinators of the Pediatric Oncology Group (POG) front-line ALL protocols reviewed patient registrations to identify any other patients with possible CMT. The goal was to provide preliminary information about patients with undiagnosed CMT who develop ALL. PATIENTS AND METHODS: Five children with ALL who were enrolled in POG B-precursor or T-cell ALL protocols from 1994 to 1999 subsequently were determined to have CMT hereditary neuropathy. Their clinical presentations and treatment records were reviewed in detail. Records of all patients entered on POG 9201 (lesser-risk ALL) were reviewed to identify all cases of significant vincristine toxicity noted in the first 6 months of treatment. RESULTS: The five identified patients all had substantial peripheral neurotoxicity that required alteration in treatment and/or orthopedic/physical therapy evaluation and follow-up. The POG 9201 review identified 25 of 686 patients (3.6%) with significant peripheral neuropathy. Three of 25 were diagnosed with CMT; the others have had no testing reported. CONCLUSIONS: A family history of CMT or other peripheral neuropathy should be sought at the time of diagnosis of ALL. Testing for CMT should be considered in any child with substantial vincristine-induced peripheral neurotoxicity. Treatment of such patients must be individualized. Testing of all patients with significant peripheral neuropathy would be necessary to determine the percentage of such neuropathy explained by underlying CMT.

Adolescent↗