Although they were described in 1985 by Japanese authors 1 there are few studies in the Western Hemisphere 2, 3. This verified the small importance initially given to identification of these small lesions which now are known to vitally require early identification.
Aunque fueron descritas en 1985 por autores japoneses 1, existen pocos estudios en el hemisferio occidental 2, 3, lo que nos ratifica la poca importancia inicial que se le dio a la identificación de estas lesiones pequeñas y que hoy reconocemos como vital.