tumors that originate from the nerve sheath comprise diverse groups -perineuroma, neurofibroma and schwannoma. the epithelioid variant of these tumors is uncommon and mostly seen in malignant counterparts. although this type of morphology is well recognized in peripheral nerve sheath tumors, its presence in the central nerves is rarely reported. very few cases of nerve sheath tumors have been r...

Current methods of forensic hair analysis rely upon comparisons of either hair morphology or DNA. Microscopic examination of hair can indicate species, race, body and method of removal. However, determining the age and gender of a subject based on hair morphology is not widely accepted. In forensic medicine sex from hair can be determined in decomposed bodies and mutilated bodies. Root sheath c...

Odontogenic tumors develop in the jaw bones from the odontogenic tissue-oral epithelium in tooth germ, enamel organ, dental papilla, reduced enamel epithelium, remnants of Hertwig's root sheath or dental lamina, and so forth. Hence, a bewildering variety of tumors are encountered in the maxilla and mandible. Ameloblastoma is the second most common odontogenic neoplasm after odontomes, and it ha...

A 43-year-old woman had trigger-point injections for chronic neck pain by a traditional Chinese medicine physician. Paravertebral muscles at C5-C6 were infiltrated with lidocaine. Thirty minutes later, right-sided hemiparesis with nystagmus, dysarthria, and anisocoria developed. The patient complained of vertigo, vomited multiple times, and became somnolent. Neuroimaging revealed air in the ven...

In an unprecedented effort in the field of vitiligo, a global consensus resulted on a suggested new classification protocol for the disease. The main histopathological finding in vitiligo is the total absence of functioning melanocytes in the lesions, while the inflammatory cells most commonly found on the edges of the lesions are CD4+ and CD8+ T lymphocytes. Physical and pharmacological treatm...

The management of nonvital immature permanent teeth poses quite a challenge. apexification procedure is in use for long-term now but the treated are more prone to fracture questioning prognosis this technique. introduction regenerative procedures treatment these favorable; however, despite increasing endodontic therapy procedures, inconsistent results seen root development. Conservation Hertwig...

PURPOSE To report an upper eyelid mass which proved to be a desmoplastic trichilemmoma. METHODS A 60-year-old man had a slowly enlarging upper eyelid mass. The tumor was excised. The pathologic evaluation of the tumor was centered on the differential diagnosis. RESULTS The clinical appearance of this lesion is nonspecific and can simulate a verruca, follicular keratosis, or basal cell carci...

The feasibility of quantifying sodium and potassium in single human erythrocytes was demonstrated by spectrochemical analysis of emissions from plasmas produced by 193-nm laser ablation of blood cells confined in a sheath flow. In one scheme, single blood cells that happened to be in the ablation volume were sampled. In another scheme, individual blood cells were first sighted and then synchron...

Hair morphology is highly differentiated between populations and among people of European ancestry. Whereas hair morphology in East Asian populations has been studied extensively, relatively little is known about the genetics of this trait in Europeans. We performed a genome-wide association scan for hair morphology (straight, wavy, curly) in three Australian samples of European descent. All th...

The most common root malformations in humans arise from either developmental disorders of the root alone or disorders of radicular development as part of a general tooth dysplasia. The aim of this review is to relate the characteristics of these root malformations to potentially disrupted processes involved in radicular morphogenesis. Radicular morphogenesis proceeds under the control of Hertwi...