Occult Papillary Thyroid Carcinoma Presenting as a Metastatic Pleural Effusion.

Lee, Kye Young; Myong, Na Hye; Kim, Keun Yeol

doi:1995.42.4.594

Tuberc Respir Dis > Volume 42(4); 1995 > Article

Case Report

Tuberculosis and Respiratory Diseases 1995;42(4):594-599.
DOI: https://doi.org/10.4046/trd.1995.42.4.594 Published online August 1, 1995.

Occult Papillary Thyroid Carcinoma Presenting as a Metastatic Pleural Effusion.

Kye Young Lee, Na Hye Myong, Keun Yeol Kim

¹Department of Internal Medicine, College of Medicine, Dankook University Cheonan, Korea.
²Department of Pathology, College of Medicine, Dankook University Cheonan, Korea.

Abstract

Although papillary carcinoma of the thyroid generally follows an indolent course characterized by slow growth and the absence of distant metastases, several available reports suggest that metastasis to bone and/or lung parenchyma may occur infrequently. But pleural metastases are known to be very rare, so there have been only two case reports about the pleural metastases of papillary thyroid carcinoma in the literatures. Even the case of occult papillary thyroid carcinoma presenting as a metastatic pleural effusion has been never been reported. Recently we experienced a case with the chief complaint of dyspnea due to massive pleural effusion, the cytologic examination of which revealed the papillary carcinoma with psamomma bodies. The examination of the thyroid revealed no definite primary tumor. The total thyroidectomy was done with the plan of post-operative radioactive iodine treatment and the pathologic result confirmed the occult papillary microcarcinoma as expected. With the present case report, the extension of the clinical spectrum of metastatic papillary carcinoma of the thyroid is expected.

Key Words: Papillary thyroid carcinoma, Psamomma body, Pleural metastasis, Occult carcinoma