Hyalinizing trabecular tumor: Cytologic, histologic and molecular features and diagnostic considerations

Area of Science:

• Endocrinology
• Surgical Pathology
• Cytopathology

Background:

• Hyalinizing trabecular tumors (HTTs) are uncommon neoplasms originating from the thyroid's follicular cells.
• They typically present as asymptomatic, well-circumscribed solitary thyroid masses.
• Accurate diagnosis can be challenging due to overlapping features with other thyroid lesions.

Purpose of the Study:

• To review the key features of hyalinizing trabecular tumors.
• To highlight diagnostic challenges in fine needle aspiration cytology.
• To differentiate HTTs from potential mimickers like papillary thyroid carcinoma and paraganglioma.

Main Methods:

• Review of cytologic, histologic, and molecular findings in hyalinizing trabecular tumors.
• Comparative analysis with morphologically similar thyroid neoplasms.
• Emphasis on features aiding distinction on fine needle aspiration cytology.

Main Results:

• Cytologic and histologic features that help differentiate HTTs from mimickers are identified.
• Molecular data provides additional diagnostic support.
• Careful examination is essential to rule out entities like papillary thyroid carcinoma, medullary thyroid carcinoma, and paraganglioma.

Conclusions:

• Distinguishing hyalinizing trabecular tumors from mimickers requires a comprehensive approach.
• Understanding cytologic and histologic nuances is critical for accurate diagnosis.
• Proper diagnosis ensures appropriate management of these thyroid neoplasms.