Browsing by Author "Chuaqui, B"

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    Anencephaly, dorsal hypermelia, and duplication of the vertebral column: A rare type of rachipagus conjoined twins
    (WILEY-LISS, 1996) Spencer, R; Chuaqui, B; Garcia, CJ
    The rare combination of hypermelia with craniorachischisis and duplication of the vertebral column has been found in three cases, two published and one previously unreported. Even though the previous authors had come to other conclusions, careful analysis of the details in these twins leads to the inescapable conclusion that they were all dorsally united parasitic rachipagus twins. The nature of the original union was clearly indicated by (1) the articulation of autositic ribs to two different vertebral columns but to a single ventral sternum, (2) the articulation of parasitic ribs also to the two vertebral columns but fusion of the ribs and clavicles dorsally without an interposed sternum, and (3) the dorsal location of the rudimentary viscera of the parasite. The orientation of notomelic arms was confirmatory but not diagnostic. The proposed embryologic origin of these twins is presented. (C) 1996 Wiley-Liss, Inc.
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    Failure of high doses of calcitriol and hypercalcaemia to induce apoptosis in hyperplastic parathyroid glands of azotaemic rats
    (2001) Jara, A; González, S; Felsenfeld, AJ; Chacón, C; Valdivieso, A; Jalil, R; Chuaqui, B
    Background. Whether calcitriol administration, which is used to treat secondary hyperparathyroidism in dialysis patients, induces regression of parathyroid-gland hyperplasia remains a subject of interest and debate. If regression of the parathyroid gland were to occur, the presumed mechanism would be apoptosis. However, information on whether high doses of calcitriol can induce apoptosis of parathyroid cells in hyperplastic parathyroid glands is lacking. Consequently, high doses of calcitriol were given to azotaemic rats and the parathyroid glands were evaluated for apoptosis.
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    Histological features of resolving acute, non-complicated phlegmonous appendicitis
    (2000) Ciani, S; Chuaqui, B
    The histological features of resolving acute appendicitis are described. Formalin-fired, paraffin-embedded appendices of 200 cases with acute, non-complicated phlegmonous appendicitis were reviewed.
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    Preterm labor: Placental pathology and clinical correlation
    (LIPPINCOTT WILLIAMS & WILKINS, 1999) Germain, AM; Carvajal, J; Sanchez, M; Valenzuela, GJ; Tsunekawa, H; Chuaqui, B
    Objective: To determine the relevance of ischemia in the incidence of preterm labor. A second objective was to document perinatal outcomes for patients with preterm labor classified according to its clinical, functional, and pathologic characteristics (infectious, ischemic, mixed, or idiopathic).