RADIOLOGY

A radiologist is reviewing requests for gadolinium-based contrast MRI (ACR Group II agent). In which of the following clinical scenarios is contrast-enhanced MRI CONTRAINDICATED or requires special caution?

Appeared in: INI-CET EXAM -2026

Explanation

The primary concern with gadolinium-based contrast agents (GBCAs) is the risk of Nephrogenic Systemic Fibrosis (NSF), a serious condition affecting patients with severe renal dysfunction.
The American College of Radiology (ACR) has identified specific risk factors that warrant checking a patient's renal function (e.g., eGFR) before administering GBCAs.
These risk factors include age over 60 years, a history of renal disease, hypertension, and diabetes mellitus.
The patient in this scenario presents with two of these major risk factors: age (60 years) and diabetes.
Therefore, administering a GBCA without first assessing renal function is a significant safety concern and requires special caution, making it the most critical scenario among the options.

Why Other Options Were Wrong

Option A: This patient has documented normal renal function. GBCAs are considered safe for administration in children and adults with normal kidney function.
Option B: While an eGFR of 30 mL/min/1.73 m2 indicates severe renal impairment (Stage 4 CKD is 15-29), the risk of NSF with newer Group II GBCAs is considered extremely low. The ACR states that for Group II agents, renal function assessment is optional, and there are no dose restrictions for patients with an eGFR of 30 or higher. The key is that the renal function is known, allowing for an informed risk-benefit decision.
Option C: A young, healthy individual without any known risk factors for kidney disease (like diabetes, hypertension, or a family history of renal disease) is at very low risk for having significant renal impairment. Routine screening of renal function is not typically required for this population before receiving a Group II GBCA.

Related Visual

Clinical Relevance

Nursing practice connection: Use the key finding related to Contraindications for Gadolinium-Based Contrast Agents (GBCAs) to guide bedside assessment, documentation, and the next nursing action.
Nurses are often responsible for screening patients before imaging studies with contrast. It is crucial to identify patients at high risk for contrast-related complications, such as those with diabetes and advanced age.
Failure to identify and screen at-risk patients before administering GBCAs can lead to the development of NSF, a debilitating and potentially fatal condition.
A key nursing intervention is to review the patient's history for risk factors like diabetes, hypertension, and age, and ensure that recent renal function labs (e.g., eGFR) are available and reviewed for high-risk patients before they are sent for a contrast-enhanced MRI.

How to Approach the Question

First, identify the core of the question: it asks for the scenario with the highest risk or contraindication for using a gadolinium-based contrast agent (GBCA).
Recognize that the primary risk associated with GBCAs is Nephrogenic Systemic Fibrosis (NSF), which is linked to poor renal function.
Evaluate each option based on the risk factors for renal impairment.
Option A (child with normal renal function) is low risk.
Option B (eGFR of 30) presents a known, albeit significant, level of renal impairment. However, the risk is quantifiable, and with a Group II agent, it's considered very low.
Option C (healthy 30-year-old) has no apparent risk factors, making pre-screening unnecessary by many guidelines.

Concept Tested & Keywords

Concept Tested: Contraindications for Gadolinium-Based Contrast Agents (GBCAs)
Stem keywords: gadolinium-based contrast MRI, ACR Group II agent, CONTRAINDICATED, special caution
Lead-in keywords: In which of the following clinical scenarios
Clinical cues: Age > 60 years
Clinical cues: Diabetes mellitus

Question ID

QjrSAMqVoGA42YZudfQ0c7

Reference Book

E6 Medicine Harrison 22e Part 2 p. 1293-1295

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