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Benign nodular goiter with spindle cell component.

Mitsuyoshi Hirokawa¹, Reiji Haba, Yoshio Kushida

¹Department of Diagnostic Pathology, Kuma Hospital, Kobe, Japan. mhirokawa@kuma-h.or.jp

Pathology International

|July 13, 2010

Summary

This summary is machine-generated.

Three benign nodular goiters showed a spindle cell component. These spindle cells are non-neoplastic, derived from follicular cells, and important to distinguish from aggressive thyroid cancers.

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Area of Science:

Endocrinology
Surgical Pathology
Thyroid Oncology

Background:

Nodular goiters can present with diverse histopathological features.
Distinguishing benign thyroid lesions from malignant ones is crucial for patient management.

Observation:

Three cases of benign nodular goiter exhibited a spindle cell component.
Spindle cells were bland with pale/clear cytoplasm, arranged in fascicles or nests.
A clear transition between follicular cells and spindle cells was observed.

Findings:

Immunohistochemistry confirmed thyroglobulin and thyroid transcription factor-1 positivity in spindle cells.
Spindle cells were negative for CD34 and showed low Ki-67 (MIB-1) proliferation index (<1%).
These findings support a follicular cell origin and non-neoplastic nature of the spindle cells.

Implications:

Recognition of this benign spindle cell lesion is vital to avoid misdiagnosis.
Accurate differentiation from aggressive thyroid malignancies like papillary or anaplastic carcinoma is essential.
This finding aids in appropriate clinical and surgical decision-making for thyroid nodules.