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May 1987

An Enlarging Tumor of the Foot

Author Affiliations

Duke University Medical Center, Durham, NC

Arch Dermatol. 1987;123(5):653-654. doi:10.1001/archderm.1987.01660290121029

REPORT OF A CASE  The patient was an 88-year-old woman with a ten-year history of a slowly enlarging tumor over the lateral transverse arch of the left foot. The tumor was asymptomatic until the mass of the tumorPhysical examination revealed a healthy, elderly woman with a pedunculated tumor, 15 mm in diameter, attached to the lateral transverse arch of the left foot (Fig 1). The tumor was fleshy, nonulcerated, and hypopigmented. An indentation into the volar surface of the foot had been created by the mass of the tumor.After achieving anesthesia with 1% lidocaine with epinephrine, a shave biopsy of the lesion was performed (Figs 2 through 4).What is your diagnosis?An Enlarging Tumor of the Foot

DIAGNOSIS:  Eccrine poroma.

HISTOPATHOLOGIC FINDINGS  Microscopic sections of hematoxylin-eosin-stained tissue revealed a tumor arising from the epidermis that consisted of broad, anastomosing bands of