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Biomedical subjects

W F Knox

Publications and source records attributed to W F Knox.

29 records · Page 2Linked to original sources
PubMed1993

Multinucleated stromal giant cells of the colonic lamina propria in ulcerative colitis.

Multinucleated stromal giant cells were seen in the colonic mucosa in biopsy specimens from two patients with long-standing quiescent ulcerative colitis. Similar cells have been described at other sites associated with chronic inflammation, including the lower female genital tract, bladder and anus. The immunophenotype of the cells in the colonic mucosa suggested that they had originated from fibroblasts rather than histiocytes, in common with cells seen at other sites of inflammation. These examples lend support to the concept of there being a reactive morphological change possibly related to interaction with mast cells. These multinucleated giant cells are distinct from histiocytic giant cells and should not be confused with them.

Aged↗
PubMed1989

Cytomegalovirus cholecystitis and colitis associated with the acquired immunodeficiency syndrome.

Cytomegalovirus (CMV) is an important cause of acalculous gangrenous cholecystitis in immunocompromised persons. We report a case of acalculous acute cholecystitis and active colitis associated with CMV in a patient suffering from the acquired immune deficiency syndrome. The condition was treated successfully with surgery and 9-(1,3,-dihydroxy-2-propoxymethyl)guanine intravenously.

Acquired Immunodeficiency Syndrome↗
PubMed1988

Method for showing human spermatogenesis using Arachis hypogaea (AHA) lectin.

Using biotinylated Arachis hypogaea agglutinin (AHA) or peanut lectin (PNA) and an avidin-peroxidase procedure, the various stages of spermatid development were visualised with great clarity; a light haematoxylin counterstain permitted the easy recognition of spermatogenic cells in the same section. This method is particularly useful in the interpretation of poorly fixed material and may be helpful in studies of cyclical maturation of spermatozoa, irrespective of whether the material is obtained at biopsy or necropsy.

Acrosome↗
PubMed1987

Pulmonary vascular candidiasis and use of central venous catheters in neonates.

A retrospective study of infant deaths in this maternity hospital carried out from 1976-86 showed a recent increase in fatalities with systemic candidiasis. Ten of twenty five cases occurred between July 1985 and June 1986. Most of these infants had Candida plugging pulmonary vessels, often accompanied by vasculitis, thrombosis, and parenteral lipid embolism. The adoption of central venous catheters for prolonged parenteral feeding of very preterm infants may have accounted for this phenomenon. Over the same decade there was an increased incidence of Candida isolates from all admissions to the neonatal intensive care unit: the prolonged survival of very low birthweight infants and the use of multiple courses of antibiotics were also factors.

Candida↗
PubMed1986

Pulmonary hypoplasia in a regional perinatal unit.

83 cases of pulmonary hypoplasia were found in 709 perinatal necropsies in St. Mary's Hospital between 1976 and 1983. 49 of these infants were inborn, representing an incidence of 1.4 per 1000 births. Diaphragmatic hernia was present in 43% and was the commonest reason for referral, usually to the neonatal surgical unit, from an outside hospital. Renal malformation, often with oligohydramnios, was seen in 25%, and 11% had no other major disease. The respiratory symptoms associated with pulmonary hypoplasia in the absence of diaphragmatic hernia seem to have encouraged the referral of these infants to the neonatal medical unit. However, more than half the liveborn infants with pulmonary hypoplasia died during the first postnatal day. In comparison with first week deaths from other causes, short survival was a particular feature of pulmonary hypoplasia in infants weighing less than 2.5 kg and pneumothorax and pulmonary haemorrhage were commoner in term infants with hypoplastic lungs.

Abnormalities, Multiple↗
PubMed1986

Restricted feeding and human intestinal plasma cell development.

Small intestinal mucosa from 129 necropsies and 15 surgical specimens from infants aged from birth to 21 months was examined for the presence of cells containing IgA, IgM, and IgG using the PAP immunoperoxidase technique. Immunoglobulin containing cells were nearly always absent in infants under 1 week of age but occurred in the second week of life in infants who had had milk feeds. At this time, IgM containing cells were predominant, but IgA containing cells were more numerous by the sixth week. IgG containing cells were generally sparse. Parenterally fed infants who had received little or no intestinal milk showed significantly fewer immunoglobulin containing cells than those who had been fed normally, irrespective of gestation. Lack of stimulation by food and bacterial antigens may contribute to immunoglobulin containing cells failing to occur in these parenterally fed neonates.

Age Factors↗
PubMed1984

Histological classification of chronic granulocytic leukaemia.

On the basis of the trephine marrow histology at presentation, 52 Ph1 positive cases of chronic myeloid leukaemia were divided into two subgroups, classical chronic granulocytic leukaemia (CGL) and chronic megakaryocytic granulocytic myelosis (CMGM). In 24 cases in which conventional therapy had preceded trephine biopsy, the distribution of cases between the two groups was found to have been significantly altered. Subsequent analysis was therefore confined to the remaining 28 untreated cases; of these 15 were classified as CGL and 13 as CMGM; no statistically significant difference was found between the two groups in respect of patient's age, leucocyte counts, platelet counts, NAP scores or of occurrence of 'blast' crisis. The differential diagnosis between idiopathic myelofibrosis (IMF) and CMGM subgroup is discussed. It was concluded that classification of chronic myeloid leukaemia on the basis of marrow histology should be restricted to Ph1 positive cases in order to obviate the possible inclusion of cases of IMF within the CMGM subgroup.

Chromosomes, Human, 21-22 and Y↗
PubMedDate not supplied

Villitis of unknown aetiology: its incidence and significance in placentae from a British population.

A histological study of 1000 randomly selected placentae from women delivered in Manchester, UK, revealed 136 cases of villitis; this is a higher incidence than that recorded in Australia and North America but lower than that noted in South America. There were no obvious clinical differences between mothers whose placentae showed a villitis and those in a control group whose placentae were free of villitis. As in other studies, there was an association between the presence of a villitis, particularly severe villitis, and fetal intrauterine growth retardation. The nature of this association cannot, however, be clarified until the aetiology of villitis is determined.

Adult↗