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Background Pediatric desmoid tumors (PDTs) represent a group of rare, distinct lesions. While sparse, available literature suggests that PDT are particularly aggressive and difficult to control when compared with their adult counterpart. Methods A retrospective review identified 39 patients who underwent treatment of PDT at St. Jude Children’s Research Hospital over a 12-year period. Clinicopathologic...
Vanilla planifolia, a highly prized tropical crop, produces commercial, vanilla. We investigated RAPD genetic diversity and geographical structure within V. planifolia. Multivariate analyses revealed three separate geographical groups of V. planifolia: a) a Costa Rican group; b) a Mexican group consisting only of cultivated plants from north of the Trans-Mexican Volcanic Belt; and c) a Mexican group...
Ornithocephalus torresii Salazar & Soto Arenas, a new species from the Pacific slope of Oaxaca. Mexico, is described and illustrated. It is distinguished by the nearly closed, globose flowers and the cymbiform lip with a small, irregularly dentate-lacerate lobule at each side of the base. A key to all the species ofOrnithocephalus hiterto recorded from Mexico is provided.
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