Macule

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The macule is the simplest dermatological lesion. It is flat and can only be seen and not felt. The macule is noted by a change in color of the skin. It may be brown, blue, red or exhibit a lesser pigment or an absence of pigment. The color of the lesion is one way in which a diagnosis may be focused.

Macules may develop as a result of cystic or otherwise severe acne. They occur after a pimple or cyst has healed, and may remain for up to six months. They are sometimes known in such cases as "pseudo-scars", but unlike true scars they are not permanent.

Examples of macular lesions and disorders

• Freckle
• Vitiligo
• Tinea versicolor
• Becker's nevus
• Café-au-lait spot
• Erythrasma
• Fixed drug eruption
• Junctional nevus
• Lentigo maligna
• Lentigo
• Lewandowsky-Lutz dysplasia
• Melasma
• Phototoxic drug eruption
• Stasis dermatitis
• Mongolian spot

Macules by color

Brown

• Becker's nevus
• Café-au-lait spot
• Freckle
• Melasma
• Photoxic drug eruption

Blue

• Ink (tattoo)
• Mongolian spot
• Ochronosis

Red

• Drug eruptions
• Juvenile rheumatoid arthritis
• Rheumatic fever
• Viral exanthems

Hypopigmented

• Piebaldism
• Radiation dermatitis
• Vitiligo
• Tuberous sclerosis

fr:Maculevi:Chấm (da liễu học)

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .