Inflammatory pseudotumour of the sigmoid colon mesentery: US and CT findings (2004:12b)

Abstract

The concept of inflammatory pseudotumor has evolved from meticulous pathological studies; some of its histological features resemble a spindle-cell sarcoma. Despite the fact that it usually affects children and young adults, only limited numbers of childhood cases have been reported in the pediatric literature. Recognition of this rare entity is important because the clinical manifestations and radiological features may be indistinguishable from a malignant lymphoproliferative disorder. This entity has been reported to be anywhere in the body, including a variety of intra-abdominal organs. Although one of the most common intra-abdominal sites is the mesentery, localization within the mesentery of the sigmoid colon is particularly rare. We present a case of abdominal inflammatory pseudotumor of the sigmoid colon mesentery, defining its radiological and primarily ultrasound and Doppler ultrasound findings, with a review of additional examples from the literature.

Inflammatory Myofibroblastic Tumor: A Rarely Seen Submucosal Lesion of the Stomach

“…Additional to such findings, because it has an infiltrative appearance, it may not be differentiated from many of the metastatic diseases [2, 4]. Significant vascular signals may be received in Doppler US [13]. …”

Inflammatory pseudotumor of the colon

“…They should be considered in differential diagnosis of any soft-tissue mass in the abdomen with nonspecific imaging features. Abdominal pain, a palpable mass, and iron-deficiency anaemia are the most common presenting symptoms and signs ( 8 , 9 ).…”

“…An inflammatory pseudotumor usually has a variable enhancement pattern with intravenous iodinated contrast ranging from no enhancement, to heterogeneous enhancement, to peripheral enhancement. Larger lesions may reveal central, nonenhancing, necrotic areas ( 5 , 8 , 10 ).…”

Pseudotumor of the Sigmoid Colon Causing Bowel Obstruction

“…IPT is a rare benign lesion that closely mimics malignancy clinically and on imaging. 1 It is a reactive or regenerative entity that may be related to chronic infection, intraparenchymal hemorrhage, or autoimmune disorder. 2 Although IPT most commonly originates in the lungs and orbit, it can be found in any organ.…”