Biomedical subjects
B Carpenter
Publications and source records attributed to B Carpenter.
Some thoughts on the nature of ectopic parathyroid hormones.
Explore the source record for details and available documents.
Limb prognosis in lumbar sympathectomy.
Explore the source record for details and available documents.
Truncus arteriosus communis associated with mitral valve and left ventricular hypoplasia without ventricular septal defect: unique combination.
A unique case of truncus arteriosus communis associated with mitral valve and left ventricular hypoplasia, but without ventricular septal defect (VSD), is described. The embryology of this anatomy is considered. The neonatal hemodynamics and the clinical implications of this rare combination of defects are discussed.
Hepatic mesenchymal hamartoma in a neonate: a case report and review of the literature.
To describe an unusual presentation of mesenchymal hamartoma in a critically ill neonate necessitating a novel therapeutic embolization before definitive resection. An unusual presentation of a large hepatic mass in a newborn complicated by pulmonary hypertension and vascular "steal" with renal insufficiency is presented. The mass was initially successfully embolized, but then revascularized, necessitating resection in an attempt to improve the clinical status of the critically ill neonate. The resected mass was a mesenchymal hamartoma with a necrotic center and extensive arterial collateralization. The patient began improving immediately after resection. Mesenchymal hamartoma may present in the neonate as a diagnostic dilemma. This is the first case report describing persistent pulmonary hypertension and renal compromise from this tumor. Embolization as a therapeutic modality to address this tumor is described. The cause of the persistent and severe pulmonary hypertension remains unclear,but may be related to the tumor.
Role of electron microscopy in head and neck pathology in adults and children.
Diagnostic electron microscopic studies specific to the head and neck region are limited in both children and adults. Even information about the workload created by specimen acquisition from this region in the electron microscopy laboratory is lacking. To address these deficiencies, various specimens gathered from adults (N = 6607) and children (N = 1556), over a 5- and 10-year period, respectively, and blocked in plastic resin were surveyed. Head and neck samples accounted for 16.4% of these samples from adults and 13.5% from children, representing sizable contributions to workload from an anatomic region amounting to less than 10% of body mass. In adults, diagnostic problems posed by metastatic neoplasms account for a considerable proportion of the cases submitted for electron microscopy; in the pediatric age group, undifferentiated primary tumors of the head and neck region frequently require ultrastructural study. In both circumstances, spindle cell, look-alike, neuroendocrine, and small cell tumors can frequently be rapidly assessed and differentiated by ultrastructural details. Problem cases are inevitable given the complexity of this region and the number of different tissues and organs in close proximity. It is advantageous to anticipate the possibility of encountering difficult differential diagnostic problems by sampling lesions of the head and neck for glutaraldehyde fixation more frequently.
Alveolar soft-part sarcoma of the orbit.
Alveolar soft-part sarcoma is a malignant soft tissue neoplasm that involves mainly the deep soft tissues of the extremities, particularly the thighs and the buttock. Involvement of the orbit is uncommon. We describe a young child with such a tumor and illustrate the characteristic features.