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Imaging Studies III: Computed Tomography01:27

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
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Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
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Gene Regulation and Targeted Therapy in Gastric Cancer Peritoneal Metastasis: Radiological Findings from Dual Energy CT and PET/CT
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[A man with an abnormal PET-CT scan].

Tamara J Meulman1, Shiuw H Ho-Han, Tadek R Hendriksz

  • 1Albert Schweitzer Ziekenhuis, Dordrecht.

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Summary
This summary is machine-generated.

An 18FDG PET-CT scan revealed unexpected abdominal wall abnormalities in a rectal cancer patient. These were caused by a foreign body reaction to surgical mesh, not cancer recurrence.

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Area of Science:

  • Nuclear medicine imaging
  • Oncology
  • Surgical complications

Background:

  • Positron Emission Tomography-Computed Tomography (PET-CT) with 18-fluorodeoxyglucose (18FDG) is crucial for cancer staging and monitoring.
  • Abdominal wall abnormalities can mimic metastatic disease, complicating patient management.

Observation:

  • A 65-year-old patient with rectal carcinoma presented for an 18FDG PET-CT scan.
  • The scan identified nodular foci of increased 18FDG uptake in the ventral abdominal wall.
  • These findings were initially suspected to represent carcinomatous peritonitis.

Findings:

  • Histopathological analysis or further investigation revealed the abnormalities were due to a foreign body reaction.
  • The reaction was associated with a surgical mesh implanted five months prior for an umbilical hernia repair.
  • This highlights a non-neoplastic cause for increased FDG uptake in the abdominal wall.

Implications:

  • This case underscores the importance of considering iatrogenic causes for unexpected findings on 18FDG PET-CT scans.
  • Differentiating between inflammatory/reactive processes and malignancy is critical for accurate diagnosis and treatment planning.
  • Radiologists and oncologists should be aware of mesh-related foreign body reactions as a potential mimic of peritoneal carcinomatosis.