Rectal ameboma: A new entity in the differential diagnosis of rectal cancer

Table 1 Clinical and imaging findings of amoebic colitis

	Ameobic colitis
Clinical features	Presents with abdominal pain and dysentery. Spectrum of colonic manifestations include: (1) Acute protocolitis (dysentery); (2) Fulminant colitis leading to colonic wall perforation; (3) Toxic megacolon; (4) Chronic colitis (non-dysenteric); and (5) Ameboma
Imaging findings	Ulceration; most commonly affects cecum and rectum; ileum is spread helps to differentiate it from Crohn or tuberculosis