Because they are rare, their incidence has not been clearly established 1,but about 190 cases have been described in the medical literature to date. Of these approximately 150 have been reported in premenopausal women from 30 to 40 years of age and 40 cases have been reported in men 4, 5, 7, 12.
Por ser una lesión poco frecuente, su incidencia no ha sido claramente establecida 1, pero se considera que existen actualmente unos 190 casos descritos en la literatura médica, de los cuales aproximadamente 150 han sido reportados en mujeres premenopáusicas 30 a 40 años y 40 casos en hombres 4, 5, 7, 12.