1. Shape on Low Power

  1. Christine J. Ko1 and
  2. Ronald J. Barr2,3

Published Online: 8 MAR 2011

DOI: 10.1002/9781444340235.ch1

Dermatopathology: Diagnosis by First Impression, 2nd edition

Dermatopathology: Diagnosis by First Impression, 2nd edition

How to Cite

Ko, C. J. and Barr, R. J. (2011) Shape on Low Power, in Dermatopathology: Diagnosis by First Impression, 2nd edition, Wiley-Blackwell, Oxford, UK. doi: 10.1002/9781444340235.ch1

Author Information

  1. 1

    Yale University School of Medicine, New Haven, Connecticut, USA

  2. 2

    Laguna Pathology Medical Group, Laguna Beach, California, USA

  3. 3

    University of California, Irvine, California, USA

Publication History

  1. Published Online: 8 MAR 2011
  2. Published Print: 11 MAR 2011

ISBN Information

Print ISBN: 9780470657119

Online ISBN: 9781444340235



  • shape on low power, tested entities, showing low-to high-power views - for dermatopathology novice, simple and effective way to approach a slide;
  • regular epidermal acanthosis;
  • blastomycosis - pseudoepitheliomatous hyperplasia above abscesses;
  • coccidioidomycosis;
  • pseudoepitheliomatous hyperplasia above abscesses;
  • fibroepithelioma of pinkus - fibrotic stroma adjacent to hair follicles, and reticulated strands of epithelium;
  • inverted follicular keratosis - sebaceous glands, basaloid proliferations connecting to epidermis;
  • auricular pseudocyst - and prominent lymphoid follicles in the wall;
  • elastosis perforans serpiginosa - pink collagen fibers, vertically extended through epidermis;
  • trichoadenoma and circular dermal islands


This chapter contains sections titled:

  • Polypoid

  • Square/rectangular

  • Regular acanthosis

  • Pseudoepitheliomatous hyperplasia above abscesses

  • Proliferation downward from epidermis

  • Central pore

  • Palisading reactions

  • Space with a lining

  • Epidermal perforation

  • Cords and tubules

  • Papillated dermal tumor

  • (Suggestion of) vessels

  • Circular dermal islands