Other General Dermatologic Terminologies

00:00 Dermatopathology -- Other general dermatologic terminology.

00:06 Plaque. A plaque is an elevated, solid, superficial lesion greater than one centimeter in diameter.

00:16 Examples include psoriasis, Bowen’s disease, mycosis fungiodes, eczema, and tinea corporis.

00:26 Patch. A patch is a flat skin discoloration.

00:32 A large macule is when it’s greater than one centimeter in diameter.

00:38 Examples are the nevus flammeus here on the left, and vitiligo on the right.

00:45 Wheel. A wheel is a plaque that is evanescent, quickly fading, and pruritic or itchy.

00:53 Examples are urticaria and dermatographia.

00:58 Vesicle. A vesicle is a papule that contains clear fluid or a blister.

01:06 Examples include herpes zoster on the left and herpes simplex on the right.

01:13 Bulla. A bulla is a large vesicle with localized fluid collection that is greater than half a centimeter in diameter.

01:23 Examples include bullous pemphigoid here on the left, bullous impetigo and pemphigus vulgaris.

01:31 Pustule. A pustule is a papule that contains purulent material.

01:38 Examples include acne and pustular psoriasis, also impetigo and follicullitis.

01:47 Cyst. A cyst is a nodule with fluid or semi solid material.

01:54 Examples include a epidermoid cyst on the left and cystic acne on the right.