Lichen Spinulosus Workup

Updated: Aug 14, 2017
  • Author: Christopher R Gorman, MD; Chief Editor: William D James, MD  more...
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Approach Considerations

Caccetta et al proposed an algorithm for a clinical approach to the diagnosis of digitate keratoses. [8]


Laboratory Studies

Diagnosis should be made on clinical grounds alone. At present, no laboratory tests are specific or diagnostic for lichen spinulosus.


Histologic Findings

Histologic findings of lichen spinulosus are similar to those observed in keratosis pilaris. In lichen spinulosus, dilated hair follicles are filled with a keratotic plug. An inflammatory lymphocytic infiltrate occurs around the follicle and in the dermis. Hyperkeratosis, parakeratosis, and acanthosis may be present in the follicle.