Lateral retrocanthal orbitotomy is a new approach that provides extended access to the entire lateral orbit. The technique is rapid and can be extended in a single continuous incision to the medial orbit. The structural integrity of the lateral retinaculum is preserved, which appears to improve the postoperative cosmetic and functional result.
The lower eyelid splint appears effective in maintaining lower eyelid position postoperatively. There were no complications with its use, and the splint was tolerated well. Benefits of the splint over the Frost suture include less risk of corneal abrasion, ability to check visual function, and ability to use the splint bilaterally.
Mycobacterium chelonae should be considered in cases of abscesses that persist despite broad-spectrum intravenous antibiotics, and in cases of maxillary sinusitis with bony involvement that do not respond to traditional treatment methods.
In mice, the yolk sac appears to play a crucial role in nourishing the developing embryo, especially during embryonic days (E) 7-10. Lipoprotein synthesis and secretion may be essential for this function: embryos lacking apolipoprotein (apo) B or microsomal triglyceride transfer protein (MTP), both of which participate in the assembly of triglyceride-rich lipoproteins, are apparently defective in their ability to export lipoproteins from yolk sac endoderm cells and die during mid-gestation. We therefore analyzed the embryonic expression of apoB, MTP, and ␣ -tocopherol transfer protein ( ␣ -TTP), which have been associated with the assembly and secretion of apoB-containing lipoproteins in the adult liver, at different developmental time points. MTP expression or activity was found in the yolk sac and fetal liver, and low levels of activity were detected in E18.5 placentas. ␣ -TTP mRNA and protein were detectable in the fetal liver, but not in the yolk sac or placenta. Ultrastructural analysis of yolk sac visceral endoderm cells demonstrated nascent VLDL within the luminal spaces of the rough endoplasmic reticulum and Golgi apparatus at E7.5 and E8.5. The particles were reduced in diameter at E13.5 and reduced in number at E18.5-19. The data support the hypothesis that the yolk sac plays a vital role in providing lipids and lipid-soluble nutrients to embryos during the early phases (E7-10) of mouse development. -Terasawa,
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