[Roentgen computer tomography and sonography in thyroid gland diagnosis]

Area of Science:

• Radiology
• Endocrinology
• Medical Imaging

Context:

• Thyroid gland imaging is crucial for diagnosing various pathologies.
• Echography (ultrasound) and Computed Tomography (CT) are key imaging modalities.
• Differentiating benign from malignant thyroid lesions can be challenging.

Purpose:

• To outline the diagnostic capabilities of thyroid echography and CT scans.
• To highlight the role of imaging in evaluating thyroid masses and conditions.
• To establish the optimal sequence of diagnostic investigations for thyroid disorders.

Summary:

• Thyroid echography is a non-invasive, cost-effective method providing structural information that complements laboratory tests.
• Ultrasound findings like echogenicity patterns can suggest cystic structures, benign lesions, or diffuse changes seen in Graves' disease and lymphocytic thyroiditis.
• CT scans are valuable for assessing retrosternal goiters, thyroid malignancies, and metastatic spread, though differentiating benign from malignant masses without invasion is limited. CT cannot differentiate hyperthyroidism or thyroiditis.

Impact:

• Echography should be the initial imaging modality following patient history and physical examination.
• CT imaging is essential for surgical planning of retrosternal goiters and assessing advanced malignancy.
• The findings guide the selection of further in-vivo investigations based on specific clinical problems.