RESUMO
ABSTRACT Objective To compare the historic risk of recurrence (RR) and response to therapy to risk stratification estimated with historical pathology reports (HPRs) and contemporary re-review of the pathological slides in patients with differentiated thyroid cancer (DTC). Subjects and methods Out of 210 DTC patients with low and intermediate RR who underwent total thyroidectomy and remnant ablation in our hospital, 63 available historic pathologic samples (HPS) were reviewed. The RR and the response to therapy were evaluated considering historical histological features (histological type, tumor size, capsular invasion, number of lymph node metastases) and then, reassessed after observing additional histological features (vascular invasion, extrathyroidal extension, size of lymph node metastases, presence of extranodal extension, and/or status of the resection margins). Results A change in the RR category was observed in 16 of 63 cases (25.4%). Out of 46 patients initially classified as low RR, 2 patients were reclassified as intermediate RR, 4 as high RR, and 1 as noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP). Out of 17 patients initially classified as intermediate RR, 3 were reassigned to the low RR group, 5 as high RR, and 1 as NIFTP. The percentages of structural incomplete response at final follow-up changed from 2.2 to 0% (p = 1) in patients with low RR and from 6.3 to 20% (p = 0.53) in patients with intermediate RR. Conclusion A detailed report of specific features in the HPR of patients with DTC might give a more accurate RR classification and a better estimation of the response to treatment.
Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Adulto Jovem , Neoplasias da Glândula Tireoide/patologia , Neoplasias da Glândula Tireoide/terapia , Carcinoma/patologia , Carcinoma/terapia , Medição de Risco/métodos , Recidiva Local de Neoplasia/patologia , Valores de Referência , Tireoidectomia , Valor Preditivo dos Testes , Reprodutibilidade dos Testes , Fatores de Risco , Resultado do Tratamento , Metástase Linfática , Invasividade Neoplásica , Recidiva Local de Neoplasia/classificaçãoRESUMO
En el carcinoma colorrectal Ia diseminación a los ganglios linfáticos es un factor pronóstico reco nocido. La presencia de ganglios linfáticos con micrometástasis en muchos casos no puede ser detectada por técnicas rutinarias. Se estudiaron prospectivamente 162 ganglios linfáticos de 30 pacientes con carcinoma de colon, los cuales según los resultados de Ias técnicas rutinarias fueron clasificados como Dukes A (2), Dukes B (19) y Dukes C (9). Un paciente con enfermedad colónica benigna se uso como control negativo. Todos los ganglios se seccionaron en mitades, una de Ias cuales se almacenó en nitrógeno líquido para su ulterior estudio por técnicas de biología molecular, mediante Ia expresión dei antígeno carcinoembrionario (CEA). La otra mitad fue fijada en formaldehído e incluída en parafina para su estudio anatomopatológico e inmunohistoquímico. Dei total de los casos se detectó un aumento dei 50% de Ia sensibilidad en Ia detección de micrometástasis mediante Ia reacción en cadena de Ia polimerasa con transcriptasa reversa (RT PCR) para los Dukes A B y se detectó Ia expresión de dicho antígeno en el total de ]os casos Dukes C. Estos resultados evidencian una mayor sensibilidad en Ia detección de micrometástasis utilizando RT PCR en comparación con Ias técnicas rutinarias, incluyendo Ia inmunohistoquímica.