Extensive extramedullary hematopoiesis in a thyroid nodule.

Lazzi, S; Als, C; Mazzucchelli, L; Kraft, R; Kappeler, A; Laissue, J · Mod Pathol · 1996

case_report · Level V

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Abstract

We describe a case of extramedullary hematopoiesis in a hyperplastic thyroid nodule from a patient with primary myelofibrosis. The presence of extensive extramedullary hematopoiesis in the thyroid gland was suspected as a result of fine-needle aspiration cytologic examination and was confirmed by histo- and immunomorphologic examination of the resected nodule. The diagnosis of myelofibrosis was established on the basis of clinical findings, hematologic laboratory results, and bone marrow morphologic characteristics.

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