SECTION EDITOR: MARY S. STONE, MD; ASSISTANT SECTION EDITORS: SOON BAHRAMI, MD; CARRIE ANN R. CUSACK, MD; SENAIT W. DYSON, MD; MOLLY A. HINSHAW, MD; ARNI K. KRISTJANSSON, MD
On histopathologic examination, there were angulated glandular islands present in the reticular dermis (Figure 2). At higher magnification, the glands were lined with a single columnar cell layer that was embedded in a vascular and cellular stroma typical of endometrial tissue. There was no pronounced mitotic activity, cellular atypia, or other evidence of malignancy (Figure 3).
Umbilical Nodule in a 32-Year-Old Woman —Diagnosis. Arch Dermatol. 2011;147(11):1317-1322. doi:10.1001/archdermatol.2011.326-b