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At least 1,063 records · Page 59Linked to original sources
PubMed1975

Extroversion of cerebral hemispheres in a full term human foetus.

Extroversion of the cerebral hemispheres and a posterior intestinal fistula are described in a male foetus with single umbilical artery and craniorhachischisis. The paper has distinction of describing for the first time the cerebral extroversion in a full term human foetus. At this stage of development, the everted cerebral hemispheres, after having proliferated exuberantly to a considerable size present a disorganised appearance which would vary in every case of this type. However, the lateral ventricles are still visible, structures comparable to thalami and choroid plexus can be made out and the vascular masses with large blood clots seen in anencephaly are minimal. That the posterior intestinal fistula represents persistence of an accessory neurenteric canal is discussed. The neural and neurenteric defects in the specimen described here are possibly due to abnormal arterial pattern in the caudal half of the body, imposed by single umbilical artery.

Abnormalities, Multiple↗
PubMed2003

Aspects of temporal bone anatomy and pathology in conjunction with cochlear implant surgery.

Cochlear implantation is a treatment for patients with severe sensorineural hearing loss/deafness, who get no help from ordinary hearing aids. The cochlear implant is surgically placed under the skin near the ear and a very thin electrode array is introduced into the cochlea of the inner ear, where it stimulates the remaining nerve fibers (1,2). The operation is complicated; it is performed with the aid of a microscope, and involves drilling very close to vital vessels and important nerves. The method was introduced in Sweden in 1984 by Professor Göran Bredberg, then at Stockholm Söder Hospital. High resolution computed tomography (CT) of the temporal bone is a part of the preoperative evaluation preceding cochlear implantation. It is a method for visualizing the bony structures of the middle and inner ear - to diagnose pathology and to describe the anatomy. In Stockholm, these examinations have usually been performed at the Radiology Department of Stockholm Söder Hospital. Examinations of cochlear implant candidates from other parts of Sweden and from abroad are also sent there for special reviewing. The first work concerns CT of the temporal bone and cochlear implant surgery in children with CHARGE association. This is a rare condition with multiple congenital abnormalities, sometimes lethal. Children with CHARGE have different combinations of disabilities, of which impairments of vision and hearing, as well as balance problems and facial palsy can lead to developmental delay. There have been few reports of radiological temporal bone changes and none of cochlear implant surgery for this group. The work includes a report of the findings on preoperative CT and at surgery, as well as post-implant results in two children. A review of the latest diagnostic criteria of CHARGE and the temporal bone changes found in international literature is also included. The conclusion was that certain combinations of temporal bone changes in CHARGE are, if not specific, at least extremely rare in other materials. CT can visualize these changes and be used as a diagnostic tool. This is important, since some of the associated disabilities are not so obvious from the start. Early treatment is vital for the child's development. This work also shows that cochlear implantation may help some of these often very isolated children to communicate. The second work is a radioanatomic study of one of the structures of the inner ear - the bony canal for the cochlear nerve. It involves measurements of the dimensions of the canal on 117 silicone rubber casts of the temporal bone (from a unique collection of casts at Uppsala temporal bone laboratory) and on 50 clinical CT-studies (100 ears). The purpose was to show the normal variation, which is of use in the appraisal of congenital temporal bone malformations on CT. Based on our results we propose that if the canal is less than 1.4 mm, as measured on CT, the possibility of cochlear nerve abnormality should be considered. This is of interest since aplasia of the cochlear nerve is a contraindication to cochlear implantation. If the canal is wider than 3.0 mm, then other anomalies may coexist, with the risk of CSF gusher when a cochleostomy or stapedectomy is performed.

Abnormalities, Multiple↗
PubMed1975

[Hereditary melanotic tumors of Drosophila. Determination of the tumorous transformation of larva hemocytes].

Two different phenomena contribute to the histogenesis of melanotic formations in tumoral strains of drosophila : an abnormal multiplication of certain blood cells and their encapsulation by normal hemocytes. The statistical distribution of melanotic tumors in populations of individuals submitted during precise periods of their life to the action of agents such as supraoptimal temperature or ionizing radiations, permits to suggest for the tumoral transformation of larval hemocytes in drosophila, the following mechanism : this transformation is caused by an event occuring in the cytoplasm and determined by the activity of a nuclear gene.

Animals↗
PubMed1992

Effects of white light on the pineal gland of the chick embryo.

Chick embryos were directly exposed to a source of white light during incubation and sacrificed before hatching. The light caused a number of teratological effects such as high mortality, delay in development, celosomy, hepatomegaly, auricular dilation and micrognatia. The pineal gland of the illuminated embryos showed an increase in number and size of the intracytoplasmic lipid droplets of the follicular pinealocytes. These findings suggest that the pineal gland of the chick embryo is sensitive to light.

Abnormalities, Multiple↗
PubMed1992

Developmental anomalies at the thoracic outlet: an analysis of 200 consecutive cases.

Anatomic observations were made during 200 consecutive transaxillary surgical procedures performed in 175 patients because of unremitting signs and symptoms of nerve or vascular compression at the thoracic outlet. There were 160 cases of brachial plexus compression and 40 cases of arterial or venous occlusion. In 132 (66%) of these cases, single or multiple abnormalities were recognized that represented developmental variations previously described in anatomic dissections or in embryologic studies. There were 17 cases of cervical rib or first thoracic rib abnormalities and 20 supernumerary scalene muscles. Developmental variations were identified in 86 scalene and 39 subclavius muscles or their insertions. Comparisons revealed a higher percentage of developmental anomalies in this group of patients than in consecutive anatomic investigations reported in unselected populations. This information was interpreted in light of recent embryologic studies and histochemical and morphometric ultrastructural studies of scalene muscle. The preponderance of evidence suggests that neurovascular compression in the region of the thoracic outlet derives from a combination of these factors: predisposing morphologic variations, structural modifications conditioned by functional requirements, and changes in fiber type or myosin isoform consequent to trauma. The correlation of clinical syndrome with morphologic characteristics alone was significant only for the Paget-Schroetter syndrome.

Adult↗
PubMed1992

Syndrome--a changing concept.

Syndrome is one of the oldest terms in the medical vocabulary. Traditionally, the term has been used mainly as a designation for complex medical entities, such as multiple abnormalities, that are characterized by clusters of concurring symptoms, usually three or more. During the mid-twentieth century, the meaning and the use of the term were altered. First to take place was an attempt to eliminate physicians' names from syndrome nomenclature, resulting in a significant increase in the use of descriptive designations in proportion to eponyms. But the trend was counterbalanced by the creation of new classes of eponyms. Eponymous syndrome nomenclature now includes the names of literary characters, patients' surnames, subjects of famous paintings, famous persons, geographic locations, institutions, biblical figures, and mythological characters. This was followed by a relaxation in the scope of the definition of syndrome, wherein the term could also be used as a modifier indicating a special (sometimes unspecified) complexity of an already named pathological condition. Eventually syndrome changed from its original use as an exclusively medical term and came to mean anything unusual, abnormal, bizarre, or humorous, whether medical, social, behavioral, or cultural. This unrestrained use of the term is the principal cause of an enormous volume of the sometimes irrelevant syndrome literature cluttering databases in the MEDLARS system and of the deterioration of "SYNDROME" as a specific MeSH term and a useful search parameter.

Abstracting and Indexing↗
PubMed1992

Nosocomial infection in the surgical intensive care unit.

The critically ill surgical patient is at high risk for the development of ICU-acquired infection. Normal mucosal defenses are breached by surgical incisions or by intravascular devices, urinary catheters, and endotracheal tubes. The integrity of the gastrointestinal epithelium is compromised by the lack of enteral nutrition and episodes of hypoperfusion, resulting in translocation of normal or disturbed enteric flora. The indigenous microbial flora, an important component of normal host defenses against invasive infection, is disrupted through the use of broad-spectrum antibiotics or by poorly understood influences associated with critical illness. Systemic immunity is altered, and multiple abnormalities of specific and nonspecific immune function can be documented. Infections acquired within the ICU are commonly caused by endogenous organisms of low intrinsic pathogenicity, and the contribution of these infections to ICU outcome is controversial. Diagnosis is established by directed investigations, focusing on surgical sites and invasive devices. Therapy is primarily physical (drainage of infected collections or removal of contaminated devices), and antimicrobial therapy should employ narrow-spectrum agents guided by the results of Gram stain and culture. The prevention of ICU-acquired infection is based on timely and definitive surgical therapy, judicious use of invasive devices and antibiotics, and early enteral feeding. Infection-control measures aimed at endogenous reservoirs show some preliminary promise for certain subsets of patients, but remain, at present, experimental.

Cross Infection↗
PubMed2003

[Cephalometry study of craniofacial and upper airway in boys with OSAS].

OBJECTIVE: The purpose of the study was to find out craniofacial and upper airway characteristics of boys with OSAS. METHODS: Craniofacial and upper airway morphology was studied by computerized cephalometric analysis in 7 mixed dentition boys with OSAS and 29 healthy boys. RESULTS: The main differences of OSAS patients were shown as follows: longer dimension of cranial base with clockwise rotation of palate plane and mandibular plane, increased height of the tongue, inferiorly displaced hyoid bone, decreased sagittal dimension of upper airway in soft palate level and tongue base level. In addition, the tongue and soft palate occupied a larger portion of the oropharyngeal area. CONCLUSION: Patients with OSAS presented multiple abnormalities in craniofacial and upper airway. Cephalometry can be useful in diagnosis and determining the appropriate treatment for OSAS patients.

Cephalometry↗
PubMed1992

Lethal short limb dwarfism with dysmorphic face, omphalocele and severe ossification defect: Piepkorn syndrome or severe "boomerang dysplasia"?

The authors report a case of lethal neonatal dwarfism characterized by striking micromelia, fused rudimentary and supernumerary digits, large, soft head, pronounced hypertelorism, protruding eyes set laterally, enormous omphalocele and severe deficiency of tubular bone and spine ossification. Histologic examination showed lack of ossification of the cartilaginous anlage of many tubular bones. The cartilage had irregularly distributed chondrocytes. The matrix contained hypocellular and degenerated areas with scattered large chondrocytes. In a few bones a very disorganized growth cartilage was present. The case is similar to that described by Piepkorn et al. (1977) and may represent a severe form of "boomerang dysplasia" (Kozlowski et al., 1981; Tenconi et al., 1983; Kozlowski et al., 1985; Winship et al., 1990).

Abnormalities, Multiple↗
PubMed1992

Application of molecular genetics to the early diagnosis and screening of lung cancer.

Recent studies of the molecular biology of lung cancer have identified multiple abnormalities. Despite this vast cataloging of genetic lesions, the chronology of these events and those which occur early remains essentially unknown. This review summarizes the genetic abnormalities in lung cancer cells, including mutation, amplification, and overexpression of dominant protooncogenes as well as deletion and mutation of recessive oncogenes. In addition, possible candidate genes exist which may participate in the early activation events of lung cancer, and evidence for their role in the early development of cancer is discussed. These lesions may be helpful in developing strategies to screen for lung cancer.

Genetic Markers↗
PubMed2005

Leuconostoc bacteremia in a child with short-gut syndrome.

In the last decade Leuconostoc species have been reported with increasing frequency as human pathogens, causing bacteremia, meningitis and peritonitis. We report here a child with short-bowel syndrome who developed bacteremia following multiple surgeries for necrotizing enterocolitis. Leuconostoc species was isolated from the blood cultures. The child was successfully treated with ampicillin and gentamycin. He however remained total parenteral nutrition dependent due to his multiple abnormalities. We call the attention of microbiologists and pediatricians to this emerging pathogen, which is intrinsically resistant to vancomycin and can be misidentified in the microbiology laboratory as Viridans streptococci or Enterococci. Increased awareness by clinicians of this organism is called for, if it is to be recognized and appropriately treated.

Bacteremia↗
PubMed2005

Unilateral subcortical calcification: a manifestation of dural arteriovenous fistula.

We describe the imaging findings in a dural arteriovenous fistula (AVF) with unilateral subcortical calcification. A 50-year-old woman patient suffered from hypertension and chronic headache. Recently, marked headache and a changed consciousness level were noted. The imaging studies demonstrated left subcortical calcification and cerebral sulcus effacement. MR imaging and angiography revealed multiple abnormal tortuous vessels, mainly from left external carotid artery with left-sided transverse sinus occlusion. The final diagnosis was type II a + b dural AVF (classification of Djindjian and Merland), and the patient underwent endovascular embolization and radiosurgery.

Brain Diseases↗
PubMed1992

Intrauterine growth retardation, mild frontonasal dysplasia, phocomelic upper limbs with absent thumbs and a variety of internal malformations including choanal atresia, congenital heart defects, polysplenia, absent gall bladder as well as genitourinary anomalies. A possibly "new" MCA syndrome?

Report on a female infant who showed intrauterine growth retardation; dysmorphic face with relative macrocephaly, mild frontonasal dysplasia, and small dysmorphic ears; phocomelic upper limbs with absent thumbs and radiologically poor differentiation of the long tubular bones but normal lower limbs. Autopsy revealed multiple internal abnormalities including choanal atresia, complex heart malformation, bilobed lung on the right, polysplenia, absent gall bladder as well as genitourinary anomalies. This condition represents a possibly "new" MCA syndrome with poor prognosis and yet unknown etiology.

Abnormalities, Multiple↗