Department of Surgery, Hospital HMG Coyocán, CDMX, México;
Coordination of Medical Services, Mexican Red Cross I.A.P., CDMX, México;
Pathology Laboratory, Grupo Diagnóstico, CDMX, México;
Appendicolith; Fecalith; Chronic; Appendicitis; Acute; Abdomen; Abdominal; Calcification; Acute; Appendicitis;