sea urchin granuloma

sea ur·chin gran·u·lo·ma

granulomatous nodules, either foreign-body type or composed of epithelioid cells, from retention of the spine of the sea urchin, occurring several months after the skin suffered the wound.

sea urchin granuloma

a type of foreign body granuloma in which nodules of granulation tissue develop in the skin several months after contact with the silicate in the spines of a sea urchin.