Definition of Nodule

noduleNodule is a small cluster of cells that arises from the subcutaneous or dermis layer of the skin and forms a swelling.

Nodules are solid and distinct from the surrounding tissue. Most skin nodules arise from causes other than dermatologic, such as neurofibroma and lipoma. Nodules may exist in other parts of the body, typically as symptoms of systemic disease.

See also MACULEPAPULEPUSTULE.

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