The American Society of Dermatopathology

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Interactive Case Study - December 2014

Stable nodular lesion on the midline lower back (with zoomable virtual slide)

Ryan J. Carr, MD; Jennifer M. McNiff, MD

Question 1:

Clinical History:

A 52-year-old man presented with an asymptomatic nodular lesion in the midline of his lower back. A biopsy of this lesion shows the following histopathology (Figures 1-4).

Click this image to view the zoomable slide.

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Given the morphologic findings, what is the most appropriate diagnosis?