Morphometric analysis in cytologic evaluation of papillary thyroid carcinoma

Area of Science:

• Cytopathology
• Endocrinology
• Oncology

Background:

• Accurate differentiation of thyroid lesions is crucial for appropriate patient management.
• Papillary thyroid carcinoma (PTC) requires distinction from benign conditions and follicular neoplasms.
• Nuclear morphometry offers quantitative features for cytologic analysis.

Purpose of the Study:

• To compare nuclear morphometric features of papillary carcinomas, follicular neoplasms, and benign thyroid lesions.
• To evaluate the utility of nuclear morphometric parameters in the differential diagnosis of thyroid nodules.

Main Methods:

• Cytologic samples from 64 thyroid cases were analyzed.
• Six nuclear morphometric parameters were measured: nuclear area, perimeter, MaxD, MinD, form factor, and MaxD/MinD ratio.
• Statistical comparison between benign lesions, follicular neoplasms, and papillary carcinomas was performed.

Main Results:

• No significant differences in nuclear parameters were found between benign lesions and follicular neoplasms.
• Significant differences were observed between benign lesions and papillary carcinomas for most parameters, excluding form factor.
• The MaxD/MinD ratio was the only parameter significantly differentiating follicular neoplasms from papillary carcinomas.

Conclusions:

• The MaxD/MinD ratio is a key nuclear morphometric feature for differentiating papillary thyroid carcinoma from other thyroid lesions.
• This quantitative parameter can be integrated with existing cytologic criteria for improved diagnosis of difficult thyroid cases.