RESUMO
A new species, Quercussontraensis Ngoc, Binh & Son is described from Son Tra Nature Reserve, Son Tra Peninsula, Central Vietnam. We examined the morphology and constructed a highly resolved phylogeny of Q.sontraensis and its relatives (including Q.langbianensis and Q.cambodiensis) using Multiplex ISSR genotyping by sequencing (MIG-seq). The morphological analyses and molecular evidence support the distinction between the new species (Q.sontraensis) and its relatives.
RESUMO
Lithocarpus vuquangensis Ngoc & Hung is described from Vu Quang National Park, North Central Vietnam. The morphological comparison and phylogenetic analysis based on rbcL, matK and ITS provided evidence that the new species was not assignable to any of the previously known taxa in Vietnam and its surrounding countries. The description, photographs, preliminary conservation status and DNA barcode sequences are also provided for the new species.
RESUMO
Lithocarpus dahuoaiensis Ngoc & L. V. Dung, a new species from the Central highland of Vietnam, is described and illustrated. The new species is morphologically similar to Lithocarpus macphailii (M. R. Hend.) Barnett or Lithocarpus encleisocarpus (Korth.) A. Camus in having completely entire leaf margin, solitary cupule, long stalks of fruits, deeply cup-shaped or turbinate cupules, with a number of horizontal filiform lines. The species differs in its nut enclosure ca. 1/2 - 2/3 of the nut, adaxially glabrous leaf blades, secondary veins 11-12 pairs and faintly to very faintly visible hairs on the outside of the cupule. A table showing the morphological comparison of Lithocarpus dahuoaiensis with Lithocarpus macphailii and Lithocarpus encleisocarpus is also provided.
RESUMO
Homalium glandulosum Tagane & V. H. Nguyen, from Vu Quang National Park in northern Vietnam, is newly described. This species is characterized by distinct glands, often stalked, at the base of the lamina and along the margin of the stipules and bracteoles. Illustrations, DNA barcodes of the two regions of rbcL and matK, and a key to the species of Homalium in Vietnam are also provided.
RESUMO
PURPOSE: The objective of this study is to describe the surgical technique and clinical results of a modified Soave procedure through the posterior sagittal approach (PSAP) for Hirschsprung's disease. METHODS: The patient was placed in a prone jackknife position. The rectum was approached via PSAP keeping the external sphincter intact. The rectum was isolated and then divided approximately 2 cm from the dentate line. The rectum and sigmoid were freed up to the normal segment. The aganglionic and ganglionic segments were confirmed intraoperatively by frozen biopsy. The rectal mucosectomy was started 0.5 to 1 cm proximal to the dentate line, leaving 1 cm of the muscular cuff. The colon was then pulled through the anus. The aganglionic segment and transitional zone were removed. Coloanal anastomosis was fashioned 0.5 to 1 cm proximal to the dentate line. RESULTS: Ninety-six patients were operated on from January 2000 to July 2002, using the described technique. Patient ages ranged from 2 to 36 months (median age, 8(1/2) months). The aganglionic segment was located in the rectum in 56 patients and in the sigmoid colon in 40 patients. The average length of bowel resected was 20 cm (range, 10-35 cm). Combined laparotomy was performed in 2 patients and combined laparoscopy surgery in 1 infant. There were no operative or postoperative deaths. Anastomotic leakage occurred in 2 patients. Spontaneous defecation occurred in all patients. CONCLUSIONS: Posterior sagittal approach provides excellent exposure of the operative field and decreases the major complications seen with the abdominal approach. The modified Soave procedure can easily be performed with PSAP.
