This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute Appendicitis, Subject name: Surgery
In a child which of the following diseases is misdiagnosed as appendicitis: 
Select and explain. 
A. Gastroentritis, B. Lymphadenitis, C. Intussusception, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. (d) All of the aboveInfantsPre-school ChildrenSchool ChildrenPyloric StenosisIntussusceptions, Meckel'sDiverticulitis, AcuteGastroenteritisThe most common mimicker of appendicitis in this population is mesenteric lymphadenitis AdultsWomen In Their Childbearing YearsElderlyPyelonephritis,ColitisDiverticulitis(Higher incidence of false- positive diagnoses in this group) Pelvic InflammatoryDisease (PID), Tubo-OvarianAbscess, Ruptured OvarianCyst Or Ovarian Torsion, AndEctopic Pregnancy.DiverticulitisBowelObstructionMalignanciesOfTheG.I Tract&ReproductiveSystemPerforated UlcersCholecystitis