The remaining 58.1% of the cases had unreported origins. Most tumors were well differentiated 50.3% while 33% of the patients had moderately differentiated tumors. Only 11.5% of the patients had poorly differentiated tumors.
Según el grado de diferenciación de los tumores en los pacientes se establecieron los siguientes porcentajes: 50,3%, bien diferenciado; 33%, moderadamente diferenciado; y 11,5%, mal diferenciado.