Ento Key

Dermoid Cyst Key Points Dermoid cysts are a common developmental cystic choristoma Approximately 7% occur in the head and neck most commonly in the periorbital region Ninety percent or more…

Cutaneous Horn Key Points A cutaneous horn is a firm, variably pigmented, conical projection composed of compacted keratin They may arise on top of benign, premalignant, or malignant skin lesions…

Comedones Key Points A comedo is a skin condition that occurs when a dilated pilosebaceous orifice is clogged by a keratotic plug and sebum They may be open (blackheads) or…

Chalazion and Hordeolum Key Points Hordeolum is a common painful infection of the eyelid margin It is usually caused by a staphylococcal infection and presents as a red swollen furuncle…

Cavernous Venous Malformations Key Points Cavernous venous malformations, previously called cavernous hemangiomas, are rarely observed in the eyelids They are low flow developmental venous malformations and not true tumors, and…

Blepharitis Key Points Blepharitis is a common chronic inflammatory condition that affects the eyelid margin It can be classified etiologically into infectious and noninfectious types, and anatomically into anterior and…

Atopic Dermatitis Key Points Atopic dermatitis is a chronic inflammatory skin condition characterized by the presence of chronic, eczematous, or scaly lesions with remissions and exacerbations Patients may have a…

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…