Study	Appendix diameter	Wall thickening	Intraluminal fluid	Periappendiceal inflammation	Periappendiceal fluid	Appendicolith	Other findings
Aggarwala 2018							Not stated
Aguilera 2018							Not stated
Amitai 2016	Yes	Yes		Yes			High mural T2 signal secondary to mural oedema
Aspelund 2014							Not stated
Avcu 2013							High signal appendix lumen on DWI and low on ADC map
Batool 2016				Yes	Yes		Periappendiceal fat stranding
Bayraktutan 2014		Yes	Yes	Yes	Yes		Hyperintensity on DWI, hypointensity on ADC
Burke 2015	Yes			Yes	Yes	Yes
Burns 2018	Yes	Yes		Yes
Chabanova 2011	Yes	Yes		Yes	Yes
Cobben 2004	Yes			Yes			Phlegmon or abscess
Cobben 2009	Yes			Yes
Corkum 2018							Not stated
des Plantes 2016							Not stated
Dibble 2017							Not stated
Didier 2017	Yes	Yes	Yes		Yes
Dillman 2016							Not stated
Donlon 2015							Not stated
Fonseca 2014							Not stated
Herliczek 2013	Yes	Yes	Yes	Yes		Yes
Heverhagen 2012	Yes	Yes		Yes
Hormann 1998	Yes		Yes	Yes	Yes
Hotchkiss 2011							Not stated
Imler 2017							Not stated
Incesu 1997	Yes		Yes	Yes			Phlegmon
Inci 2011	Yes	Yes		Yes
Israel 2008	Yes		Yes	Yes
Jang 2011	Yes	Yes		Yes	Yes		Abscess
Johnson 2012	Yes	Yes		Yes	Yes
Kearl 2016							Not stated
Kennedy 2018	Yes	Yes		Yes	Yes
Khalil 2018							Not stated
Kinner 2017							Not stated
Koning 2014		Yes	Yes	Yes			Diffusion restriction
Konrad 2015	Yes				Yes		Abscess
Kulaylat 2015	Yes		Yes			Yes
Leeuwenburgh 2014	Yes		Yes	Yes	Yes	Yes	Destruction of wall, abscess, extraluminal free air
Lyons 2016	Yes		Yes
Masselli 2011
Martin 2017	Yes			Yes	Yes
Meesa 2011	Yes			Yes	Yes
Moore 2012	Yes		Yes			Yes
Nitta 2005	Yes	Yes		Yes
Orth 2014	Yes	Yes		Yes		Yes
Oto 2005	Yes	Yes			Yes
Ozdemir 2018	Yes			Yes	Yes		Strong hyperintense signal on DWI, concomitant hypointensity on the ADC map
Patel 2017							Not stated
Pedrosa 2009	Yes		Yes	Yes
Petkovska 2016		Yes	Yes	Yes
Ramalingam 2015	Yes		Yes	Yes
Rapp 2013	Yes	Yes	Yes	Yes	Yes		Abscess
Repplinger 2018	Yes	Yes	Yes	Yes		Yes	Increased appendix signal at DWI
Rosines 2014	Yes			Yes
Shin 2017							T1 bright appendix sign
Theilen 2015							Not stated
Thieme 2014	Yes			Yes	Yes	Yes	Abscess, lymphadenopathy, restricted diffusion
Tsai 2017	Yes	Yes	Yes	Yes	Yes
Vu 2009	Yes			Yes
Zhu 2012	Yes	Yes	Yes	Yes			Abscess, free air
Abbreviations: ADC: apparent diffusion coefficient; DWI: diffusion‐weighted imaging