Unusual gastric tumors and tumor-like lesions: Radiological with pathological correlation and literature review

Abstract

Although gastric tumors have overlapping radiologic appearances, some unusual tumors may present specific imaging features. Using multidetector computed tomography (MDCT), with water as a negative oral contrast agent and intravenous contrast medium, can provide critical information for the diagnosis of gastric diseases. In addition, MDCT can evaluate the involvement of the gastric wall and extragastric extent of the disease, as compared with gastroenteroscopy and double-contrast upper gastrointestinal study. Regarding lesion location and size, enhancing and growth patterns, presence of calcification or fat, and involvement of the gastric wall and adjacent structures, CT may provide useful information. In this review article, we review the relevant literature and discuss the CT features and the histopathologic findings of different types of gastric lesions. The lesions are divided into benign (glomus tumors, schwannomas, leiomyomas, and lipomas), malignant (gastrointestinal stromal tumors, mucinous carcinomas, lymphomas, and carcinoid tumors), and tumor-like lesions (ectopic pancreas and bezoar). Familiarity with imaging appearances and pathologic findings can help physicians make an accurate diagnosis.

Multislice Computed Tomography Imaging Of Gastrointestinal Stromal Tumors

“…GIST, a visceral sarcomatous tumor, is rarely seen but it is the most common mesenchymal tumor of the gastrointestinal tract (11). The reported mean age of gastrointestinal stromal tumor onset is slightly above the mean age of our study.…”

Lipoma Gástrico. Lesión Submucosa Infrecuente. Reporte de Dos Casos Tratados

“…Sin embargo, el diagnóstico diferencial con otras masas submucosas del estómago, como aquellas formadas por tejido muscular, nervioso, neuroendocrino; o por tumores estromales como los GIST; puede ser difícil (Kim et al, 2011). Por ello, es que se puede recurrir a la tomografía axial computarizada, la que permite apreciar lesiones circunscritas, de densidad grasa y con un valor de atenuación de -70 a -120 HU (Thompson et al;Jeong & Maeng, 2010;Kang et al, 2013;Lin et al, 2017;Ra et al, 2017); así como al ultrasonido de alta resolución, que permite visualizar la masa gástrica submucosa (Tsai et al, 2000).…”

Ectopic Liver Tissue in the Left Hypocondrium: A Case Report and a Literature Review

“…The differential diagnosis of a mass localized or attached to stomach wall is broad and includes both benign and neoplastic formations like leiomyoma, schwannoma, neurofibroma, GIST, lymphoma, and carcinoid or metastases and CT examinations are very important for the diagnosis, especially of unusual gastric tumors and tumor-like lesions (Lin et al, 2017). In our case the mass had the characteristics of an ectopic liver because of the similar structure with the mother liver and the presence of the stalk which connected it with the left lobe of the liver and which contains the blood vessels.…”