[Potential role of gravity in computerized tomography in neoplasms]

Area of Science:

• Radiology and Oncology
• Medical Imaging Techniques
• Cancer Staging

Background:

• Computed Tomography (CT) is crucial for cancer staging.
• Standard CT protocols may have limitations in accurately depicting tumor extent.
• Evolving CT techniques aim to improve diagnostic yield in oncology.

Purpose of the Study:

• To enhance the clinical utility of CT findings in oncology.
• To improve the accuracy of tumor staging (cTNM) using modified CT positions.
• To align instrumental findings with National Cancer Institute guidelines.

Main Methods:

• A 3-year study involving 432 patients with primary neoplasms (pulmonary, gastrointestinal, genitourinary).
• Integration of CT tumor staging with gravitational tests using modified decubitus positions (procubitus, triclinium).
• Comparison of lesion-adjacent fat depiction and pTNM staging accuracy between standard and modified decubitus CT.

Main Results:

• Modified decubitus CT demonstrated higher accuracy (81.5%) compared to standard CT (72.2%) for cT staging.
• Accuracy improvements were most significant in gastric, bladder, and colon lesions.
• Analysis revealed direct spread and invasion depth as common causes of mistaging in T2/T3 lesions.

Conclusions:

• Combining cTNM and pTNM assessments improves pretreatment diagnostic accuracy of CT.
• Gravitational tests and paired examination reading enhance lesion localization for prognosis and treatment.
• This approach can potentially reduce pre- and post-treatment management costs.