Biomedical subjects
Publications and source records attributed to M Corbally.
Broviac catheters are in common use for administration of parenteral nutrition, cancer chemotherapy, and antibiotic therapy within the paediatric population. Inadvertent dislodgement of these catheters is common during the initial weeks before the Dacron cuff is anchored by the ingrowth of fibrous tissue. The authors describe a technique in which an internal fixation suture is placed to prevent dislodgement or migration.
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BACKGROUND/PURPOSE: The presence of cholelithiasis is being reported with increased frequency in childhood. Little is known about the natural history of the disease, and only a few studies have been published regarding long-term results of treated patients. Controversy still exists regarding optimal treatment. Both cholecystectomy and cholecystolithotomy with gallbladder preservation have been recommended as the preferred operative intervention. The purpose of this study was to compare the long-term outcome of cholecystectomy versus cholecystolithotomy for symptomatic gallbladder disease in children. METHODS: The charts of all patients with symptomatic cholelithiasis treated in the Dublin Paediatric Hospitals during a 25-year period from 1974 till 1999 were reviewed. Data obtained included age, sex, age at presentation of symptoms, methods of diagnosis, indications for operative treatment, time interval between presentation of symptoms and surgery, surgical technique, performance of a preoperative or intraoperative cholangiogram, stone biochemistry, gallbladder histology, radiologic follow-up, the presence of recurrent or residual stones and symptoms, and the need for reoperation. Patient data were grouped according to method of surgery. All parameters were compared and evaluated. Follow-up was by way of telephone contact with all patients and completion of a questionnaire. RESULTS: There were 18 patients over a 25-year period. Eight patients underwent cholecystectomy, and 10 patients had a cholecystolithotomy. Median follow-up was 2 years in the cholecystectomy group and 5 years in the cholecystolithotomy group. All patients in the cholecystectomy group are asymptomatic and have no recurrent or residual stones on follow-up ultrasound scan. Thirty percent of the patients in the cholecystolithotomy group have recurrent right upper quadrant pain, and 30% show recurrent stones 9.5 months (range, 7 to 12 months) postoperatively. One patient underwent cholecystectomy 8.5 months postcholecystolithotomy. CONCLUSIONS: The symptomatic high stone recurrence rate postcholecystolithotomy seen in our series suggest that cholecystectomy is the preferred treatment in patients with symptomatic gallbladder disease.
BACKGROUND: Melanoma in childhood is uncommon. Some believe that melanoma among children is associated with a better prognosis than among adults. METHODS: The authors reviewed their institutional experience with melanoma in 40 patients younger than 18 years treated between 1950 and 1984. All slides were reviewed by a single dermatopathologist who was blinded to clinical outcomes. Long term follow-up was available for all but three patients. RESULTS: There were 26 girls and 14 boys. The median age at diagnosis was 15 years (range, 3-17 years). Eleven patients (28%) were younger than 12 years. Fifteen patients (38%) had melanoma arise in a congenital nevus (2 had bathing trunk nevi. The most common site was the extremity (n = 23), followed by the trunk (n = 10) and the head and neck (n = 7). Seventeen patients (43%) initially were considered to have benign lesions, and 23 patients (57%) were diagnosed correctly with melanoma at initial presentation. Only 21 of 37 evaluable patients (57%) were alive at last follow-up with a median follow-up of 18 years (range, 2-48 years). Fifteen patients (41%) died of their disease, with a median survival of 12 months (range, 6-60 months). One patient died of breast carcinoma 14 years after treatment for melanoma. Disease free survival was 57% at 5 and 10 years. Of the 15 patients who died of disease, 12 were female (P = 0.09) and 10 had melanoma arising in a congenital nevus (P < 0.05). Five-year overall survival was 78% for patients who presented with localized disease (n = 23) and 30% for patients who presented with regional metastasis (n = 16, P < 0.001). There were no survivors among those who presented with systemic disease (n = 1). CONCLUSIONS: Children with melanoma are at significant risk of dying of their disease. Survival is similar to that seen among adults and depends on stage at presentation. The survival advantage observed for adult females is not seen among children.
BACKGROUND: Hemangiopericytoma (HPC) is an uncommon tumor of childhood. PROCEDURE AND RESULTS: This paper summarizes our experience with 5 children with histologically proven HPC treated in a single institution, including 2 cases of congenital HPC. This tumor has varying clinical presentations and biological behavior. Congenital tumors have a better prognosis. Chemotherapy and radiotherapy had little effect on outcome. CONCLUSION: Complete surgical excision is the treatment of choice.
Between January 1989 and June 1993, a total of 470 liver transplantations were performed at King's College Hospital. Thirty-seven transplantations were performed in 34 patients with liver-based metabolic disease. There were 16 females and 18 males with a median age of 19 years (range 1 month to 62 years). There were 14 patients under 16 years of age. The indications for liver transplantation were Wilson's disease (n = 16), alpha 1-antitrypsin deficiency (n = 10), tyrosinaemia (n = 2), primary hyperoxaluria type 1 (PH1; n = 2), congenital haemochromatosis (n = 1), familial amyloidotic polyneuropathy (FAP; n = 1, familial hypercholesterolaemia) (n = 1) and Crigler-Najjar syndrome type I (CNS1; n = 1). These included two patients who received combined heart-liver grafts for familial hypercholesterolaemia and FAP, respectively. Two patients received combined liver-kidney transplants for PH1. There were four deaths: from sepsis (n = 2), acute hepatic vein obstruction in a left lateral segment graft (n = 1) and portal vein thrombosis with liver necrosis (n = 1). Three patients were retransplanted, one for chronic rejection and two for hepatic artery thrombosis, giving an overall graft survival of 81% and patient survival of 88% (30/34), at a mean follow-up of 34 months (range 10-64 months).
BACKGROUND: The incidence of Hickman catheter sepsis is 10% to 40%, with resultant catheter loss in one third of infections. Urokinase causes dissolution of colonized intracatheter fibrin thrombi and may improve salvage. STUDY AIMS: To evaluate the efficacy of 12-hour-interval slow-push urokinase infusion in addition to standard antibiotic therapy in the treatment of catheter sepsis in a pediatric oncology population. METHODS: A two-arm randomized double-blind trial was undertaken, with catheter salvage rate as the end point. Patients with Hickman catheter sepsis were randomized after culture data confirmed the diagnosis. The study drug was administered by a slow intravenous push and given at 12-hour intervals for a total of four doses. The catheters were aspirated after 1 hour. RESULTS AND CONCLUSIONS: The trial was stopped after 41 patients were entered into the study; 18 patients received a placebo, and 23 received the urokinase. In the placebo group, six catheters were lost; in the urokinase group, eight were lost. The rate of bacterial clearance was equivalent for both. After administration of the study drug, each group had three episodes of fever and chills; two of these resulted in hypotension (one in each group). The authors conclude that slow-push urokinase infusion during established Hickman catheter sepsis does not result in improved catheter salvage or bacterial clearance. Slow intravenous push infusions in this setting may provoke hemodynamic instability even after initiation of antibiotics.
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We performed a retrospective analysis of 28 children presenting with confirmed paratesticular embryonal rhabdomyosarcoma to examine factors predictive of fatal outcome. Complete surgery, defined as radical inguinal orchiectomy with clear microscopic margins plus radical, retroperitoneal lymph node dissection with extirpation of all gross disease, was performed in 21 patients (75 per cent). All patients received chemotherapy and 20 received radiation therapy according to protocol. Of the patients 16 have survived for more than 5 years with no evidence of disease. Univariate analysis revealed that only the presence of parenchymal metastases at diagnosis (p less than or equal to 0.040) and unresectability (p less than or equal to 0.003) were significant predictors of fatal outcome. Multivariate analysis showed that unresectability was the most important predictor of mortality with an estimated relative risk of 5.8.
We describe the technique of laparoscopy when seeking to locate an impalpable testis. The procedure was used in 86 boys with unilateral or bilateral undescended testes; of the 103 testes which were sought, 64 were present, 39 were absent and 53 were intra-abdominal. Laparoscopy is useful in the management of the impalpable testis. The information gained from the study is valuable when advising parents of the significance of an impalpable testis. For example, there is a 39% chance it will be absent, a 29% chance that it will be easily placed in the scrotum and a 38% chance that a staged procedure may be necessary.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.