scholarly journals Nodular Spindle Cell Vascular Transformation in Pelvic Lymph Nodes With Discovered on GIST1 (DOG1) Positivity Mimicking Metastatic Gastrointestinal Stromal Tumor

Cureus ◽  
2020 ◽  
Author(s):  
Jocelyn Chai ◽  
Trevor Hamilton ◽  
Cheng Han-Lee ◽  
Xiaolan Feng
Keyword(s):  
Lymph Nodes ◽  
Gastrointestinal Stromal Tumor ◽  
Spindle Cell ◽  
Stromal Tumor ◽  
Pelvic Lymph Nodes

scholarly journals Gastrointestinal Stromal Tumor of the Ampulla of Vater: A Narrative Review

2021 ◽  
pp. 1-6
Author(s):  
Bita Geramizadeh ◽  
Alireza Shojazadeh
Keyword(s):  
Gastrointestinal Stromal Tumor ◽  
Spindle Cell ◽  
English Literature ◽  
Ampulla Of Vater ◽  
Good Prognosis ◽  
Stromal Tumor ◽  
Treatment Modalities ◽  
Histologic Diagnosis ◽  
Lower Gi Bleeding ◽  
Mitotic Figures

<b><i>Background:</i></b> Gastrointestinal stromal tumor (GIST) of the ampulla of Vater is a rare occurrence. To the best of our knowledge, there has been no published review on this rare tumor in the English literature so far. <b><i>Summary:</i></b> In this review, we will discuss all the reported details of the published cases, including demography, clinical presentation, imaging, gross pathology and histopathology, immunohistochemical findings, treatment modalities, and outcome of cases with the diagnosis GIST from the ampulla of Vater in the last 20 years. <b><i>Key Message:</i></b> Twenty-five cases of GIST in the ampulla of Vater have been reported in the last 20 years in the English literature. GIST in the ampulla of Vater are usually small tumors (&#x3c;5 cm) in middle-age patients. The majority of the patients present with lower GI bleeding and abdominal pain. Imaging findings are not characteristic, and most of the patients without biopsy and with no histologic diagnosis were operated with the primary impression of adenocarcinoma, neuroendocrine tumor, and GIST. Perioperative tissue biopsy has been accurate in &#x3c;70% of the cases. The majority of the reported cases of GISTs in the ampulla of Vater have been low risk with spindle-cell morphology, low mitotic figures, and minimal atypia; reactive for C-KIT and DOG-1; and nonreactive for SMA, desmin, and S100. In the majority of the cases, duodenectomy with or without Whipple’s operation has been performed, and most of the cases showed good prognosis.

Malignant Gastrointestinal Stromal Tumor Showing Remarkable Whorl Formations

2001 ◽  
Vol 125 (5) ◽  
pp. 665-668
Author(s):  
En Yoneda ◽  
Kazuhiro Teramura ◽  
Shingo Hiruma ◽  
Takao Satou ◽  
Shigeo Hashimoto
Keyword(s):  
Cell Proliferation ◽  
Gastrointestinal Stromal Tumor ◽  
Tumor Cells ◽  
Rare Variant ◽  
Ultrastructural Study ◽  
Spindle Cell ◽  
Stromal Tumor ◽  
Spindle Cell Proliferation ◽  
Variant Pattern ◽  
Histopathologic Findings

Abstract A case of malignant gastrointestinal stromal tumor (GIST) is reported. Histologically, spindle cell proliferation with remarkable whorl formations was predominant in the tumor. Immunohistochemically, the tumor cells were diffusely positive for CD117 (c-Kit) and vimentin and partially positive for CD34. Ultrastructurally, the desmosome-like structures and interdigitations occurred much more frequently in the areas with whorl formations. These organelles were considered to be closely associated with the whorl formations. Various kinds of cellular arrangements are revealed in GISTs, but remarkable whorl formations, such as in our case, are a rare variant pattern. Herein, we discuss the histopathologic differences between this and other tumors showing whorl formations and describe the meaning of this unique arrangement. GISTs are thought to be immature tumors, and, therefore, variations in histopathologic findings are recognized. Finally, the ultrastructural study of GISTs is useful for understanding the mechanisms forming whorl formations and the differentiation or pathogenesis of GISTs.

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