What is the shape of this 3 cm lesion which because it is large, elevated and not deep is a plaque, quite different from the plaque in slide one but still a plaque. If it were deep as well it would be a tumour. This is a raised itchy large lesion that when you came back in the room from looking it up was GONE! It is a:. The shape of the individual lesions do not particularly help with the description or aid in the diagnosis so is omitted.
FYI: It is a contact dermatitis due to a chemical burn. This fellow has an itchy heel which he keeps rubbing. This has caused the skin to thicken and the skin lines to accentuate. This is a secondary skin lesion. Both of these have occurred at an injury site.
A is a thickened heaped up lesion whereas if you palpate B it feels thin, slightly indented and there is an absence of skin lines. What are they respectively? For a fabulous prize, email me kws queensu. Bonus points if you get the diagnosis. Morphology Quiz. The "learning-all-that-new-dermatology-terminology" self-quiz Dermatology is full of new terminology that you really will use over the course of your medical career so there's no time like now to start learning it.
Also, just think of how well this stuff lends itself to multiple choice questions! This quiz will take you through most of the terminology described in Dr. You can also find descriptions and lots more pictures of all the different lesions in Chapter 1 of Clinical Dermatology by T. Have fun!
No, patches are large but flat. No, nodules, although raised, are also deep and are small. No, papules are raised but small. No, crust is dried fluid, i. No, this is thickening of the skin, with accentuated skin lines, occuring in areas of scratching or rubbing. It is important to note whether a raised lesion is scaly or non-scaly, as the differential diagnosis of raised scaly lesions is quite different from that of raised smooth lesions.
A flat , generally greater than 0. Patches also called large macules may have non-palpable fine scale. Macule is a flat, generally less than 0. Macules may have non-palpable fine scale. Patch is a flat, generally greater than 0. Patches may have non-palpable fine scale. Cyst is a closed cavity or sac containing fluid or semisolid material. A cyst may have an epithelial, endothelial, or membranous lining. Nodule is a dermal or subcutaneous firm, well-defined lesion usually greater than 0.
Papule is a discrete, solid, elevated body usually less than 0. Papules are further classified by shape, size, color, and surface change. Plaque is a discrete, solid, elevated body usually broader than it is thick, measuring more than 0. Plaques may be further classified by shape, size, color, and surface change. Crust is a hardened layer that results when serum, blood, or purulent exudate dries on the skin surface. Crusts may be thin or thick and can have varying color.
Papule is a discrete, solid, elevated body usually less than or equal to 0. Scale is a type of surface change. Bullae are fluid-filled blisters greater than 0. Fluid can be clear, serous, hemorrhagic, or pus filled. Pustule is a circumscribed elevation that contains pus. Pustules are usually less than 0. Vesicle is a fluid-filled cavity or elevation less than 0.
Fluid may be clear, serous, hemorrhagic, or pus filled. Erythema and erythroderma will blanch because the color ie, redness is due to increased blood flow, not leakage of blood into the skin, as in purpura.
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