Acute appendicitis is the commonest cause of acute abdomen that necessitates surgical intervention. Appendiceal mass (AM) can complicate 2%-10% of patients with acute appendicitis. The treatment of AM is controversial.The aim of the present study was to describe the modalities of management of AM at a single teaching hospital; and to establish its prevalence and possible causes.Methods and Subjects: This is a prospective and retrospective descriptive clinical study; implemented at Bahri teaching hospital, during one year. Out of the 274 patients who were diagnosed with acute appendicitis, 94 developed AM (34.3%). Age range was 13 – 65 years. 47% of the patients were under 20 years of age. The male to female ratio was 2.9:1. 56.4% of patients received treatment for their present illness before the diagnosis of AM. The AM was diagnosed clinically in more than 55% of the patients. About ¾ of the patients were treated conservatively, 16% were treated by immediate appendicectomy and 6.4% underwent appendicectomy after failure of the conservative treatment. Only 33% of the patients underwent interval appendicectomy. The incidence of AM in BTH is high compared to the 10% worldwide, possibly due to the late presentation, miss- diagnosis and the inappropriate treatments. Our modes of managing AM are comparable to other international studies. Only 33% of the patients underwent interval appendicectomy, this finding put the interval appendicectomy in question.