Three-dimensional (3D) rotational radiography, initially developed to visualize intracranial aneurysms, is applied to the cervical spine after conventional myelography. We call this process 3D rotational myelography. 3D reconstruction and then postprocessing allows imaging in multiple planes. Spinal or nerve root sheath alterations caused by bony or soft tissue can be visualized and differentia...

Tarlov (perineural) cysts of the nerve root are common and usually incidental findings during magnetic resonance imaging (MRI) of the lumbosacral spine. There are a few case reports where symptomatic thoracic perineural cysts have been described in the literature. We report a case of a high thoracic nerve root perineural cyst that failed conservative therapy, requiring surgical intervention. Ou...

outer root sheath keratinocytes, however, keep perfect tissue homeostasis [5] , and tumors arising in an EpiDextreated area have never been reported so far. Thus, instead of ‘overregulating’, regulatory authorities should fine-tune their requirements, carefully weighting potential benefits for the patients versus costs and risks of the individual tissue engineering technology at stake. Accordin...

Pilomatricomas are relatively rare tumors of ectodermal origin from the outer root sheath cell of the hair follicle. They are usually asymptomatic, solitary, firm or hard, freely mobile, dermal or subcutaneous nodules. The purpose of this article is to present a case that illustrates the diagnostic difficulty encountered by oral surgeons and pathologists and to review the literature regarding p...

We analyzed changes of growth and apoptotic cell death in human hair follicles. In anagen hair follicles, terminal deoxynucleotidyltransferase-mediated deoxyuridine triphosphate-biotin nick labeling-positive cells were observed in the keratogenous zone of the upper bulb matrix, the inner root sheath, and the companion layer of the outer root sheath. DNA ladder formation was also detected in ana...

O ccurrence and localization of novel antimicrobial and antifeeding com pounds in w heat, 2,4-dihydroxy-l,4-benzoxazin-3-one (D IB O A ) and 2,4-dihydroxy-7-methoxy-l,4-benzoxazin3-one (D IM B O A ), and their glucosides, were examined by staining w heat plants ( Triticum aestivum L.) in the juvenile stage of growth by ferric chloride. The m ethanol extracts of the stained plant tissues gave a ...

Hair-follicle regression in the bald scalps of stumptailed macaques develops after puberty, which corresponds to an elevation of serum testosterone and dihydrotestosterone. Using the cultured cells from the pre- and postpubertal macaques, we examined the role of dermal papilla cells in testosterone-induced inhibition of outer root sheath cell proliferation. Testosterone showed no effects on pro...

Root resorption (RR) is defined as the loss of dental hard tissues because of clastic activity inside or outside of tooth the root. In the permanent dentition, RR is a pathologic event; if untreated, it might result in the premature loss of the affected tooth. Several hypotheses have been suggested as the mechanisms of root resorption such as absence of the remnants of Hertwig's epithelial root...

OBJECTIVE The aim of this study was to evaluate the microanatomy and histological features of the central myelin in the root exit zone of facial nerve. METHODS Forty facial nerves with brain stem were obtained from 20 formalin fixed cadavers. Among them 17 facial nerves were ruined during preparation and 23 root entry zone (REZ) of facial nerves could be examined. The length of medial REZ, fr...