Arthropod Bites and Stings Key Points The classes of arthropods that are medically significant to humans include centipedes, millipedes, spiders, mites, and insects The pathophysiologic mechanisms causing clinical symptoms from…
Arteriovenous Malformations Key Points Arteriovenous malformations (AVMs) are complex developmental anomalies of small abnormal arteriovenous connections that bypass the high-resistance vascular capillary bed They occur principally in the head, neck,…
Angiofibroma Key Points Angiofibromas are cutaneous vascular neoplasms characterized by the presence of single or multiple small (1-3 mm) dome-shaped telangiectatic, translucent, skin-colored, or reddish papules Single lesions are extremely…
Angioedema Key Points Angioedema is an allergenic or nonallergenic, abrupt, short-lived inflammatory swelling of the reticular dermis, subcutaneous tissue, and mucous membranes It can occur either alone, may be associated…
Actinic Keratosis Key Points Alternative names in the literature include solar keratosis and senile keratosis Actinic keratosis (AK) results from the proliferation of epidermal keratinocytes with variable degrees of dysplasia…
Acrochordon Key Points An acrochordon (skin tag) is a benign fleshy tumor that is frequently acquired in adult life The condition is characterized histopathologically by a slightly hyperplastic epithelium covering…
Abscess and Preseptal Cellulitis Key Points Periocular superficial infections can be categorized broadly into cutaneous abscess and preseptal cellulitis An abscess is defined as a localized collection of pus involving…
Trichomegaly Key Points Trichomegaly is an abnormal increase in the length, thickness, or pigmentation of the eyelashes but not in their number The causes of trichomegaly are extensive and may…
Trichiasis Key Points Trichiasis is a disorder in which the eyelashes are misdirected toward the ocular surface, without an associated in-turning of the eyelid margin Trichiasis is an acquired condition…
Telecanthus Key Points Telecanthus is an abnormally wide distance between the medial canthi with a normal interpupillary distance It can be congenital, or acquired, or isolated, associated with many syndromes,…
