Pseudomamma on the foot: An unusual presentation of supernumerary breast tissue
Yes, that’s a "pseudomamma" on the foot:
In the plantar region of the patient’s left foot, there was a well-formed nipple was surrounded by areola and hair on the surface, measuring 4.0 cm in diameter, with no palpable nodes . The remaining physical examination was normal, including the mammary line.
If you want read the source [a scholarly article]