Correspondence |

Pagetoid Dyskeratosis With Parallel Ridge Pattern Under Dermoscopy

Ellen Toyonaga, MD; Daisuke Inokuma, MD, PhD; Yukiko Abe, MD, PhD; Riichiro Abe, MD, PhD; Hiroshi Shimizu, MD, PhD
JAMA Dermatol. 2013;149(1):109-111. doi:10.1001/archdermatol.2012.3201.
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A parallel ridge pattern under dermoscopy is a prominent dermoscopic finding in macules of malignant melanoma on the palms and soles. Herein, we present a case of pagetoid dyskeratosis with a parallel ridge pattern under dermoscopy.

Correspondence: Dr Inokuma, Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15, West 7, Kita-ku, Sapporo 060-8638, Japan (inokuma@med.hokudai.ac.jp).

Conflict of Interest Disclosures: None reported.

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Figure 1. Images of the patient's lesion. A, Clinical examination shows a brownish patch around the tip of the left small finger. B, Dermoscopy shows parallel ridge pattern and fibrillar pattern.

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Figure 2. Histopathologic specimens under hematoxylin-eosin stain show pale cells in the epidermis and stratum corneum. A, Original magnification ×200. B, Original magnification ×400.




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