The American Society of Dermatopathology

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Interactive Case Study - November 2022

A 70-year-old man with a nodular lesion on the right auricle

Aayushma Regmi, MBBS; Mario W. Saab-Chalhoub, MD; Jodi J. Speiser, MD

Question 1:

A 70-year-old man presented with a 2 year history of an asymptomatic, slowly growing nodular lesion on the posterior aspect of the right auricle. Physical examination of the auricle revealed a 0.5 cm nodule that clinically appeared to involve the underlying cartilage (Figure 1).  Wide local excision showed a 1.4 cm ulcerated nodule with the following microscopic examination (Figure. 2-7). 

Click this image to view the virtual slides.

Figure 1

Figure 2

Figure 3 

Figure 4

Figure 5

Figure 6

Figure 7

Which of the following is the best diagnosis?