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?