PMC10020937_01
Tender flesh-colored nodule with lichenification of the right 3rd finger hyponychium/distal tip.
cde-2023-0015-0001-529568_f1.jpg
PMC10020937_01_cde-2023-0015-0001-529568_f1.jpg
F1
Physical examination revealed a tender lichenified flesh-colored nodule involving the distal right 3rd finger and hyponychium (Fig. 1).
a Circumscribed neoplasm with myxomatous background matrix (H&E. x20). b Suspended in basophilic material were singly disposed epithelioid round cells arranged in single cells and cords (H&E. x200). c Distinct monocytoid cells, with oval-reniform-shaped nuclei eccentrically disposed with lightly eosinophilic cytoplasm (H&E. x400).
cde-2023-0015-0001-529568_f2.jpg
PMC10020937_01_cde-2023-0015-0001-529568_f2.jpg
F2
Cytoplasm of both the rounded and spindled cells was abundant and eosinophilic (Fig. 2).
Tumor cells stained positively for EMA (DAB. x200), CD34 (DAB. x200), and P63 (DAB. x200).
cde-2023-0015-0001-529568_f3.jpg
PMC10020937_01_cde-2023-0015-0001-529568_f3.jpg
F3
Only rare cells exhibited nuclear staining for Ki-67 (Fig. 3).