Publications by authors named "Ali Shirkhoda"

Background: Respiratory diseases are the leading cause of morbidity and mortality in the survivors exposed to Sulfur Mustard (SM). The late abnormalities can be present as chronic bronchitis, tracheobronchial stenosis, asthma, bronchiectasis, airway narrowing, lung fibrosis, and lung cancers. This study aims to investigate the association between radiological findings and lung cancer development in patients exposed to sulfur mustard gas.

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Diagnosis of intestinal vasculitis is often challenging due to the non-specific clinical and imaging findings. Vasculitides with gastrointestinal (GI) manifestations are rare, but their diagnosis holds immense significance as late or missed recognition can result in high mortality rates. Given the resemblance of radiologic findings with some other entities, GI vasculitis is often overlooked on small bowel studies done using computed tomography/magnetic resonance enterography (CTE/MRE).

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Gastrointestinal stromal tumors (GISTs), the most common mesenchymal tumors of the gastrointestinal tract, are a relatively recently described entity. Most exhibit a mutated tyrosine kinase receptor gene and in some capacity are treated by tyrosine kinase inhibitors. GISTs can occur across the age spectrum but are more common in patients older than 40 years.

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While endometriosis typically affects the ovaries, deep infiltrating endometriosis can affect the gastrointestinal tract, urinary tract, and deep pelvis, awareness of which is important for radiologists. Symptoms are nonspecific and can range from chronic abdominal and deep pelvic pain to nausea, vomiting, diarrhea, constipation, hematuria, and rectal bleeding. Ultrasound and computed tomography may show nonspecific soft-tissue density masses causing bowel obstruction and hydronephrosis.

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Article Synopsis
  • Kidney neoplasms, especially renal cell carcinoma, vary in prognosis and are primarily treated through surgical removal.
  • The rise of cross-sectional imaging has led to increased detection of renal lesions, particularly in asymptomatic individuals checked for unrelated reasons.
  • This article discusses imaging findings of rare benign kidney tumors and highlights that while precise preoperative diagnoses are rare, knowledgeable radiologists can positively influence patient management.
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  • Malignant kidney tumors are the most common solid masses found in the kidneys, with renal cell carcinoma being the primary type.
  • Other types of solid malignant masses without visible fat should also be considered in the diagnosis.
  • This essay showcases imaging findings of various rare kidney tumors, including primitive neuroectodermal tumor and renal metastasis from osteosarcoma, among others.
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  • The review covers key events in the development of the pancreas (pancreatic embryology) and highlights related congenital anomalies and normal variations.
  • Each variant is described along with its appearances on various imaging techniques such as CT scans, MR imaging, and endoscopic procedures.
  • Different radiologic modalities will be used to illustrate these pancreatic variations, enhancing understanding of their presentation.
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  • Juvenile nasopharyngeal angiofibroma (JNA) is a benign nasopharyngeal tumor, and treatment options are debated, especially for advanced stages.
  • In a study of 37 patients, recurrence rates were evaluated in relation to tumor stage and surgical methods, revealing that transpalatal and Lefort I techniques are effective for preventing recurrence in specific stages.
  • Higher recurrence rates were associated with intracranial extensions of JNA, while the transpalatal approach showed low recurrence in early-stage cases, and the Lefort I approach worked well for more advanced tumors.
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Article Synopsis
  • Understanding the various imaging appearances of malignant liver lesions is crucial for accurate diagnosis, and requires knowledge of their underlying pathophysiology.
  • A multimodality pictorial approach will illustrate a range of malignant cystic lesions, including hepatocellular carcinoma and cholangiocarcinoma, to highlight their unique imaging characteristics.
  • Key features, clinical symptoms, and prognosis of these lesions will be emphasized to help differentiate them from other liver disorders effectively.
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Article Synopsis
  • Focal liver lesions can be benign or malignant, each presenting unique imaging characteristics that help in diagnosis.
  • Understanding the underlying causes of these lesions aids radiologists in recognizing specific imaging patterns.
  • Various benign conditions like hemangiomas, focal nodular hyperplasia, and hepatic abscesses will be explored, focusing on their distinguishing features, symptoms, and treatment approaches.
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The detection of adrenal lesions has increased with the expanding use of cross-sectional imaging. Magnetic resonance (MR) imaging is often useful for characterizing adrenal masses. Adrenal masses can be classified into various groups on the basis of the presence of intracellular lipid, macroscopic fat, hemorrhage, and cystic changes and the vascularity and shape of the tumor.

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Primary bone lymphoma is an uncommon malignancy that accounts for less than 5% of all primary bone tumors. The radiographic appearances of primary bone lymphoma are variable, and, because the lesion can appear near normal on plain radiographs, a second modality such as bone scintigraphy or magnetic resonance (MR) imaging should be used. Despite this variability, the presence of a solitary, permeative, metadiaphyseal lesion with a layered periosteal reaction on plain radiographs and a soft-tissue mass on MR images, especially in a patient older than 30 years, is highly suggestive of lymphoma.

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Objective: Our retrospective study was designed to determine whether the use of bone window settings increases sensitivity of CT for diagnosing appendicitis and for detecting an appendicolith in patients with pathologically confirmed appendicitis.

Conclusion: The use of bone window settings is helpful for detecting appendicoliths when evaluating patients for acute appendicitis, particularly patients in whom evidence of appendicitis is equivocal. In this era of PACS (picture archiving and communication systems), bone window settings should be used routinely.

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Purpose: To demonstrate the different patterns of renal infarction to avoid pitfalls. To present 'flip-flop enhancement' pattern in renal infarction.

Materials And Methods: Retrospective review of a total of 41 renal infarction in 37 patients were done.

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