Fibroma of the Omentum Resembling an Ovarian Tumor in the Pelvis

Abstract

We would like to report the case of a patient with fibroma of the omentum that resembled an ovarian tumor in the pelvis. Since primary tumours of the omentum are rare, there is a paucity of information about the biology of such tumors in the basic texts and literature. An ultrasound examination of the patient revealed a mass, likely of ovarian origin, which consisted of liquid and solid components. It was suspected to be a malignant ovarian tumor. However, laparotomy demonstrated it was an omental tumor. This case shows that it can be difficult to pre-operatively diagnose omental fibromas because of their close resemblance to ovarian tumors.

An omental fibroma resembling a testicular tumour but presented as an irreducible inguinal hernia

“…Even with widespread use of non-invasive imaging studies, incidental findings of such tumours remain relatively low [ 3 , 4 ]. Only a handful of cases describing omental fibromas were reported, and all of those were discovered within the abdominal cavity [ 1 , 2 , 4 , 5 ].…”

“…Essentially, fibromas are well-circumscribed tumours made up of dense collagen bundles with variable numbers of mature fibroblasts [ 2 , 4 , 5 ]. Fibromas are usually limited to their origin, despite the vast distribution of connective tissue throughout the human body [ 2 , 4 , 5 ]. They usually present as small, encapsulated, and firm tumours that are pearly grey on cross section [ 2 , 4 , 5 ].…”

“…Fibromas are usually limited to their origin, despite the vast distribution of connective tissue throughout the human body [ 2 , 4 , 5 ]. They usually present as small, encapsulated, and firm tumours that are pearly grey on cross section [ 2 , 4 , 5 ]. Fibromas are composed of typical spindled fibroblasts that are closely packed with collagen [ 2 , 5 ].…”

“…Primary tumours of the omentum are uncommon, and omental fibromas account for 2% of these [ 1 – 5 ]. Pre-operatively, omental fibromas are seldom diagnosed correctly [ 2 , 6 ]. The rarity of omental fibroma and the paucity of available information hamper making an accurate diagnosis [ 2 , 4 ].…”

“…Pre-operatively, omental fibromas are seldom diagnosed correctly [ 2 , 6 ]. The rarity of omental fibroma and the paucity of available information hamper making an accurate diagnosis [ 2 , 4 ].…”