What is the role of lab studies in the workup of seborrheic keratosis?

Updated: Oct 14, 2020
  • Author: Arthur K Balin, MD, PhD, FACP; Chief Editor: William D James, MD  more...
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No laboratory tests are needed unless the sudden appearance of multiple pruritic seborrheic keratoses occurs, which is known as the Leser-Trélat sign. This has been associated with the development of adenocarcinoma of the gastrointestinal tract, [27] lymphoma, Sézary syndrome, and acute leukemia.

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