摘要:

The fine structure of unmyelinated cutaneous nerve fibers in newborns was examined in lesions of adnexal polyp of neonatal skin. In the neonatal cutaneous nerves, unmyelinated fibers outnumbered myelinated ones. The unmyelinated fibers consisted of Schwann cells, axons and basal lamina. Their ultrastructural organization was basically similar to that in the adult skin. However, some of the unmyelinated fibers contained axonal bundles which suggested a state of cytoarchitectural immaturity or incomplete growth. Phagocytosis of melanosomes by Schwann cells was also observed.

ISSN:0303-6987    

DOI:10.1111/j.1600-0560.1977.tb00881.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

A case of pigmented storiform neurofibroma (PSN) is presented. The lesion was present in the shoulder of a 7‐year‐old black girl and recurred after 10 years. The characteristic storiform pattern and melanin production are the relevant features for histologic diagnosis. The histogenesis and taxonomic position of this lesion is discussed with emphasis on its relationship with dermatofibro‐sarcoma protuberans (DFSP) and cellular blue

ISSN:0303-6987    

DOI:10.1111/j.1600-0560.1977.tb00882.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

The microflora of normal skin in 16 patients with repeated staphylococcal and streptococcal skin infections was examined to determine whether abnormalities existed which would indicate a protective role for the indigenous flora against colonization by pathogens. Five sites‐hands, feet, axilla, groin and back‐were examined quantitatively and qualitatively and compared with a control group. Total populations of indigenous flora were significantly higher from patients with repeated skin infections of the back, axillae and feet. The frequency of isolation of different species from normal skin was comparable between the control and experimental groups, with the exception of the incidence ofStaphylococcus aurcus and Proteusspecies which were isolated only from patients with repeated skin infections. Gram‐negative bacteria were isolated with comparable frequency between the two groups, but patients with repeated skin infections tended to carry gram‐negative bacteria on multiple sites. It was concluded from the high population of indigenous flora and the types of microorganisms present that the microflora of normal skin did not appear to protect patients with repeated skin infections against colonization by pathogens. The presence of high populations ofStaphylococcus aurcuson the normal skin of patients with repeated skin infections would appear to be the most important contributing

ISSN:0303-6987    

DOI:10.1111/j.1600-0560.1977.tb00883.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

The number of epithelial cells per unit volume of tissue (Nv) and the relative volume (Vv) occupied by the spinous and basal layers of X‐irradiated and non‐irradiated rat‐tail epidermis were studied using techniques of stereologic cytology. By a simple calculation, the absolute volumes of basal and spinous keratinocytes were determined in irradiated (and in non‐irradiated, control) epidermis, 24, 48, 72 and 96 h after exposure to a single dose of 16 Krads. During this post‐irradiation period, the absolute volumetric values of both basal and spinous keratinocytes increased gradually, reaching a three‐fold increase 96 h after irradiation. At the same time, the relative volume of the spinous layer increased from 58% to 75% of the total epidermis, whereas the volume fraction occupied by the basal layer decreased from 20% to 16%. These findings support previous evidence that lethally and sublethally damaged keratinocytes are capable of a metabolic effort resulting in a cell hypertrophy which in some circumstances could lead to repair and recovery from radia

ISSN:0303-6987    

DOI:10.1111/j.1600-0560.1977.tb00884.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

The activities of eight enzymes were determined by fluorometric micromethods in epidermal tumors (basal and squamous cell epithelioma, verruca seborroeica and keratoacanthoma) and compared to the activities in the adjoining, apparently normal epidermis. The activities were increased in basal cell epithelioma, variable in squamous cell epithelioma and verruca seborroeica and lowered in keratoacanthoma.

ISSN:0303-6987    

DOI:10.1111/j.1600-0560.1977.tb00885.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

ISSN:0303-6987    

DOI:10.1111/j.1600-0560.1977.tb00886.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

ISSN:0303-6987    

DOI:10.1111/j.1600-0560.1977.tb00887.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

ISSN:0303-6987    

DOI:10.1111/j.1600-0560.1977.tb00888.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY