18F-FDG PET/CT in inflammatory pseudotumor of the colon causing intussusception

Abstract

Inflammatory pseudotumor is a rare benign lesion mimicking malignancy both clinically and radiologically. An accurate diagnosis is still difficult and is based on the histological examination. Since inflammatory pseudotumor is exceptionally rare in the colon, this unexpected lesion can be mistaken for malignancy. We report the first case of inflammatory pseudotumor in the colon that showed (18)F-fluorodeoxyglucose (FDG) uptake and acted as the lead point causing colocolic intussusception.

A semi-emergency surgery case of jejunal intussusception in an adult due to tumor

“…According to the literature, intussusception in adults is a relatively rare cause of intestinal obstruction [1][2][3] , with the most common cause being tumors, followed by other rare etiologies at diverticular 4) , granulomatous 5) , and anastomotic sites 6) . This point is clinically important because it is in sharp contrast with pediatric intussusception where idiopathic disease is the most common.…”

Epstein-Barr virus–associated inflammatory pseudotumor presenting as a colonic mass

“…Our case differs from the former case in that the spindle cells are positive for SMA and negative for all three FDC markers tested. Two additional cases were reported with similar clinical and gross anatomic features, but neither was studied for EBV or the precise cellular lineage by immunophenotypic studies (4, 10). Cheuk et al in their series reported one case with FDC markers presenting as a peri-pancreatic mass.…”

Inflammatory Pseudotumor (IPT) and Inflammatory Myofibroblastic Tumor (IMT): A Representative Literature Review Occasioned by a Rare IMT of the Transverse Colon in a 9-year-old Child

“…Clinical symptoms are nonspecific, such as nausea, vomiting, anorexia, pain, fever, chills, night sweats, weight loss, and anemia (1, 2, 7–10, 29, 31), or organotypic and site-specific, e.g., dysphagia, gastrointestinal bleeding, obstruction symptoms, especially including intestinal invagination, and icterus (1, 7, 8, 11, 22, 26, 33, 53–55).…”

“…Contrast enhancement in computed tomography is variable (60, 61); however, 18 F-FDG-PET/CT is suitable for diagnosis. (22, 30, 57, 60, 62, 63)…”

“…Transverse colon: a 71-year-old man (Ohno et al, 1998) (20), a 30-year-old man (Aalbers et al, 1999) (21), and a 30-year-old woman (Jeoung et al, 2011) (22)…”