Question:

What imaging exam should be performed first to evaluate a patient with a subcutaneous lesion?
1. Plain radiography
2. Ultrasound
3. Computed Tomography
4. Magnetic Resonance
5. Positron Emission Tomography





Answer:

The correct answer for the question "What imaging exam should be performed first to evaluate a patient with a subcutaneous lesion?" is:

2. Ultrasound



Explanation
a) to e) [Ultrasonography is an inexpensive and accessible modality.]



From the manuscript:
Anaplastic Cutaneous Lymphoma Mimicking an Infection
Radiology Case. 2014 Mar; 8(3):39-47


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From the manuscript

Anaplastic Cutaneous Lymphoma Mimicking an Infection

Free full text article: Anaplastic Cutaneous Lymphoma  Mimicking an Infection

Abstract
We present a case of a 17-year-old boy who presented with a skin lesion with extension to the soft tissues of the left thigh. On ultrasound, a homogeneous and hypoechoic expansile formation in the subcutaneous tissue was found, measuring 6.5 × 5 × 3.5 cm, with scarce vascularization. Computed tomography showed a low attenuating neoformation with surrounding edema. An inflammatory disorder was the first diagnosis, but the absence of improvement with antibiotics led us to perform magnetic resonance imaging that showed a high signal lesion on T2-weighted imaging and low intensity signal on T1-weighted imaging and surrounding contrast uptake. Positron emission tomography and computed tomography showed uptake of 18F-fluorodeoxyglucose by the lesion. The final diagnosis was anaplastic cutaneous lymphoma.






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