Thyroid fine-needle biopsy: aspiration versus capillary

Area of Science:

• Endocrinology
• Pathology
• Cytopathology

Background:

• Thyroid nodules are common, requiring accurate diagnostic methods.
• Fine-needle biopsy (FNB) is the primary diagnostic tool for thyroid nodules.
• Previous studies suggested potential differences between aspiration and nonaspiration FNB.

Purpose of the Study:

• To compare the quality of thyroid smears obtained by aspiration versus nonaspiration FNB.
• To determine if significant differences exist in key smear characteristics between the two techniques.

Main Methods:

• A comparative study involving 309 patients with thyroid nodules.
• Fine-needle aspiration biopsy (FNA) and fine-needle nonaspiration biopsy (FNNB) were performed.
• Smear quality was assessed by a single pathologist using the Mair scoring system, evaluating blood contamination, cellularity, degeneration, trauma, and architecture.

Main Results:

• No statistically significant differences were observed in smear quality between aspiration and nonaspiration FNB.
• Key parameters evaluated included blood contamination, cellular material quantity, cellular degeneration, cellular trauma, and architectural preservation.
• Both techniques yielded comparable results in terms of diagnostic sample adequacy.

Conclusions:

• Both aspiration and nonaspiration fine-needle biopsy techniques produce comparable smear quality for thyroid nodules.
• The sensitivity and specificity of both methods support their use as standard screening tools for thyroid nodular lesions.
• Clinicians can confidently utilize either FNB technique for initial assessment of thyroid nodules.