1,721,109 research outputs found
Histochemical aspects and histopathological significance of mucoid connective tissue in basal cell carcinoma
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Analisi della variazione geografica del rischio per tumori della tiroide nel Nord Sardegna. III Congresso Nazionale della Società Italiana di Statistica Medica.
No full textMaxillary chondrosarcoma. (Report of two cases)
No full textTwo cases of chondrosarcoma of the maxilla are reported together with the clinical and histological differential diagnosis. The origin of this rare tumour in the maxilla, a bone with exclusive membranous ossification, is discussed in accordance with the new concept of cell differentiation in neoplasia
Histologic differential diagnosis between reactive and neoplastic situations of the lymphatic folliculus: morphological research on semithin and ultrastructural section
No full textScanning electron microscopic features of Kaposi's sarcoma.
No full textIn order to clarify the three-dimensional structure of Kaposi's sarcoma (KS) five cases of KS of the skin were observed with a scanning electron microscope (SEM). KS lesions were investigated both in vascular and spindle cell areas and were compared with similar areas observed by light microscopy. KS appears as a spongelike neoplasm consisting of irregular vascular channels lacking endothelial cells and well-developed basement membranes. Vascular spaces and vascular slits are packed with numerous red blood cells (RBCs). SEM features of KS share some similarities with those of hemangiopericytoma, a vascular tumor composed of mature endothelial cells surrounded by pericytes. These findings are consistent with the hypothesis according to which the proliferating cells of KS are viewed as immature endothelial cells with partial differentiation into pericytes
1st results of the histopathological diagnosis of malignant non-Hodgkin lymphoma from ultrastructural sections
No full textMalignant neoplasms of the esophago-gastro-intestinal tract in the province of Sassari 1970-1982.
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