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Benign Keratosis: A Useful Term?

Rebecca Scott1, Amanda Oakley2,3

  • 1University of Aberdeen, Waikato Hospital, Hamilton, New Zealand.

Dermatology Practical & Conceptual
|May 17, 2023
PubMed
Summary
This summary is machine-generated.

The term "benign keratosis" effectively describes mixed seborrheic keratosis (SK), lichen planus-like keratosis (LPLK), and solar lentigo (SL) lesions. This classification is useful when these common skin conditions present with overlapping features.

Keywords:
benign keratosisdermoscopylichen planus-like keratosisseborrhoeic keratosissolar lentigo

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Area of Science:

  • Dermatology
  • Dermoscopy
  • Histopathology

Background:

  • Seborrheic keratosis (SK), lichen planus-like keratosis (LPLK), and solar lentigo (SL) are common benign skin lesions.
  • These lesions often appear adjacent to each other and can be challenging to differentiate clinically and dermoscopically.
  • Distinct histopathological features exist, yet overlap can occur.

Purpose of the Study:

  • To evaluate the utility of the term 'benign keratosis' for undifferentiated SK/LPLK/SL.
  • To assess lesions with overlapping clinical and dermoscopic characteristics.
  • To analyze 80 skin lesions using dermoscopic imaging.

Main Methods:

  • Dermoscopic images were sourced from a teledermoscopy database (13,000 lesions/7,000 patients).
  • Lesions queried included SK, SL, and LPLK on sun-exposed skin.
  • Evaluation involved specific dermoscopic criteria and data analysis.

Main Results:

  • Mixed clinical and dermoscopic criteria for SK and SL were observed in several lesions.
  • Some lesions also exhibited dermoscopic criteria consistent with LPLK.
  • The study identified lesions with overlapping features of these common benign keratoses.

Conclusions:

  • The study confirms a relationship between SK, LPLK, and SL.
  • The term 'benign keratosis' is validated as useful for classifying mixed or difficult-to-differentiate lesions.
  • Dermoscopy aids in identifying overlapping characteristics among these benign skin conditions.