{Reference Type}: Case Reports
{Title}: A Rare Case of Retroperitoneal Tumefactive Fibroinflammatory Lesion Related to IgG4-Sclerosing Disease.
{Author}: Nikas S;Zonitsa S;Anastasiadis P;Veniadou K;Roumelioti S;Mitsas AC;Gerasopoulos G;Gkouvis P;
{Journal}: Cureus
{Volume}: 16
{Issue}: 6
{Year}: 2024 Jun
暂无{DOI}: 10.7759/cureus.61968
{Abstract}: We present a unique case of a retroperitoneal tumefactive fibroinflammatory lesion related to IgG4-sclerosing disease; it is a rare manifestation of the IgG4-related disease, which usually causes diffuse fibrosis when located in the retroperitoneum, rather than mass-like lesions. A 49-year-old man presented to the emergency department complaining of abdominal pain and vomiting. Subsequent testing with abdominal ultrasound, CT, and MRI revealed a large retroperitoneal mass of unknown origin, heterogenous, with a concentric circles pattern best visualized in MRI. The lesion was resected, and the histological and immunohistochemical studies revealed an IgG4-related tumefactive fibroinflammatory lesion of the retroperitoneum.