Temporal triangular alopecia is also known as congenital triangular alopecia. It is a nonscarring, noninflammatory, circumscribed form of alopecia. The alopecic lesions are usually asymptomatic and present at birth or during the first nine years of life. Lesions are stable and mostly presents with roughly triangular, oval, or lancet-shaped patches in the frontotemporal region that are characterized by normal hair density of vellous hair and normal epidermis. The condition mostly occurs unilaterally, but bilateral cases (13.5â20%) can occur. TTA is associated with several disorders, one of which is Phakomatosis Pigmentovascularis. PPVs are rare syndromes characterized by the coexistence of pigmentary nevus and a cutaneous vascular malformation.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on June, 2014