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Comparative findings of lymphocytic thyroiditis and thyroid lymphoma
Enrique Lerma1, Rosa Arguelles, Mercedes Rigla
1Department of Pathology, Hospital de la Santa Creu i Sant Pau, Autonomous University, Barcelona, Spain. elerma@hsp.santpau.es
Acta Cytologica
|August 19, 2003
Summary
Cytologic examination can differentiate lymphocytic (Hashimoto
Area of Science:
- Cytopathology
- Surgical Pathology
- Endocrinology
Background:
- Distinguishing lymphocytic (Hashimoto's) thyroiditis (HT) from primary thyroid lymphomas (TL) is crucial for appropriate patient management.
- Cytologic features can aid in this differentiation, but overlap exists.
Purpose of the Study:
- To compare the cytologic characteristics of Hashimoto's thyroiditis and primary thyroid lymphomas.
- To identify key cytologic features that distinguish between these two thyroid conditions.
Main Methods:
- Review of clinical histories, cytologic smears (Diff-Quik, Papanicolaou, HE), and surgical specimens (HE slides).
- Analysis of 25 cases of lymphocytic thyroiditis and 12 cases of thyroid lymphomas.
- Histologic subtyping of lymphomas was performed.
Main Results:
- A heterogeneous population of small and large lymphocytes was common in both HT and TL.
- A monotonous population of large lymphocytes (or small cells) suggested TL.
- Presence of plasma cells favored HT.
- Diagnostic sensitivity was 67.5% for HT and 92.3% for TL.
Conclusions:
- Cytologic patterns, including lymphocyte population homogeneity and presence of plasma cells, can suggest either HT or TL.
- Further investigations are necessary for definitive diagnosis in ambiguous cases.
- Accurate differentiation is essential for guiding treatment strategies.