Abstract Purpose: To analyze gene and protein expression of metalloproteinases 1, 2, 9, 11 and 16 and their correlation with clinicopathological variables in colorectal adenocarcinoma. Methods: A retrospective study of 114 patients with colorectal adenocarcinoma treated surgically in the period 2006 to 2008 in Hospital de Câncer de Barretos - Fundação Pio XII. The evaluation of gene expression was performed by RT-PCR, and protein by immunohistochemistry. The analysis of gene expression was classified as overexpressed genes and poorly expressed (fold change of approximately 2, p<0.05). The positivity of the markers in the immunohistochemical study was performed by semi-quantitative analysis. The tissue of TMA (Tissue Microarray) was done by two independent pathologists. Results: The gene expression validated by immuno - histochemical was MMP-1(p= 0.00 and 1.57 fold change) and MMP – 2 (p= 0.01 and – 1.84 to fold change) when correlated with the histological types mucinous and adenocarcinoma NOS, MMP9 (p=0.01 and fold change of 1.13) and MMP-16 (p=0.03 and 1.61 fold change) when compared with the histological types villous and adenocarcinoma NOS, MMP - 11 statistically significant in relation to male (p = 0.04 and 1.65 fold change). Conclusions: The MMPs 1, 2, 9, 11 and 16 gene and protein expression with statistical significance in at least one of the clinicopathological variables studied. Thus, we conclude that these MMPs have potential as a prognostic factor in colorectal adenocarcinoma.

INTRODUÇÃO: Iodoterapia em pacientes com carcinoma diferenciado da tireoide tem o objetivo de reduzir a recorrência tumoral erradicando focos residuais macro e microscópicos. Os efeitos colaterais, em geral, são raros, tênues e transitórios, com pouca repercussão clínica. OBJETIVO: Relatar um caso raro de carcinoma diferenciado da tireoide apresentando grande massa sólida expansiva na base do crânio, com invasão da musculatura mastigatória esquerda e do tecido subcutâneo adjacente, sem invasão do espaço carotídeo que evoluiu com ruptura de carótida pós-iodoterapia. DISCUSSÃO: Os efeitos colaterais pós-iodoterapia são pouco frequentes e, quando presentes, de intensidade discreta. Os eventos adversos graves são muito raros, em especial, aqueles decorrentes de estruturas não invadidas diretamente pelo tecido metastático iodocaptante, como nesse caso, alertando também para a necessidade do aumento dos cuidados na terapia de grandes massas ávidas pelo radioiodo próximas às estruturas nobres.

INTRODUCTION: Radioiodine therapy for patients with differentiated thyroid cancer aims at reducing tumor recurrence by eradicating residual macro- and microscopic foci. Side effects are generally rare, tenuous and transient, with little clinical significance. OBJECTIVE: To report a rare case of differentiated thyroid carcinoma presenting a large expansive solid mass at the base of the skull, with invasion of the left masticatory muscle and adjacent subcutaneous tissue, and without invasion of the carotid space, which evolved to carotid artery rupture following radioiodine therapy. DISCUSSION: Side effects are uncommon after radioiodine therapy and when present, have mild intensity. Serious adverse events are very rare, especially those arising from structures not directly invaded by metastatic tissue with radioiodine uptake, as occurred in this case. This occurrence serves to raise awareness of the need for increased care when using radioiodine therapy on high-avidity masses located close to important structures.

Na avaliação terapêutica e prognóstica de neoplasias malignas torna-se essencial um diagnóstico morfológico preciso. Vários relatos têm enfatizado a importância da punção aspirativa guiada por tomografia computadorizada no diagnóstico de neoplasias irressecáveis e na investigação de metástases. O presente trabalho estuda a acurácia diagnóstica, a sensibilidade, a especificidade e os valores preditivos positivo e negativo obtidos com esta técnica, De 1991 a 1994, foram realizadas 210 punções aspirativas guiadas por tomografia computadorizada (TC) em 207 pacientes. Foram 128 (61,8%) pacientes do sexo masculino e 79 (38,2%) do sexo feminino, com idade média de 41 anos (01 a 91 anos). As punções foram realizadas em diferentes localizações, sendo pulmão e fígado as mais freqüentes, Quanto aos diagnósticos, os casos foram assim distribuídos: 41 casos (19,52%) com o diagnóstico de negativo para ululas neoplásicas, 131 (62,38%) de positivo, sendo que destes, em 54% foi possível o diagnóstico da linhagem citológica. Em 14 (6,67%) casos foi realizado o diagnóstico de suspeito (células atípicas) e em 24 (11,43%) casos o material foi considerado insuficiente. Dos 210 casos, 106 apresentavam exame anatomo-patológico e/ou seguimento clínico. Observou-se 47 casos (44,3%) com diagnóstico prévio à punção e 50 casos (56,7%) com exame histopatológico posterior. A comparação entre os diagnósticos citológicos e histopatológicos revelou índice de sensibilidade de 80,4%, de especificidade de 100%, valor preditivo positivo de 100%, valor preditivo negativo de 16,7% e eficiência de 81,1%. O presente estudo demonstra que a PAAF guiada pela tomografia computadorizada é uma técnica sensível e altamente específica para o diagnóstico de lesões profundas.

The therapeutic and prognostic evaluation of malignant neoplasias depends largely upon a precise morphologic diagnosis. Several papers have focused on the importance of fine-needle aspiration under computed tomography guidance in the diagnosis of unresectable neoplasms and in the investigation of metastases. The objective of this study is to evaluate the diagnostic accuracy, the sensitivity, and the negative predictive value obtained with the technique. Fine-needle aspiration cytology (FNAC) was performed on 207 patients, with a total of 210 cases, from 1991 to 1994, under computed tomography (CT) guidance. There were 128 (61.8 percent) males and 79 (38.2 percent) females with a mean age of 41 years (range 1 to 91 years). Lung and liver were the most frequent anatomic sites. The analysis of this material disclosed 41 cases with cytological diagnosis of negative for malignancy (19.52 percent), and in 131 (62.38 percent), the diagnosis was positive. It was possible to define the cytologic lineage in 54 percent of the cases. The diagnosis in 14 (6.67 percent) cases was suspicíous for malignancy, and in 24 (11.43 percent) cases the material was insufficient for the cytologic diagnosis. Of the 210 cases, 106 showed histological diagnosis and/ or clinical follow-up. Forty-seven (44.3 percent) had histological diagnosis before the FNAC and 50 cases (56.7 percent) histological diagnosis after the procedure. The comparison between cytological and histological diagnosis showed a sensibility of 80.4 percent, specificity of 100 percent, positive predictive value of 100 percent and negative of 16.7 percent. The efficiency of the test was 81.1 percent. This study showed that FNAC, under computed tomography guidance, is a sensitive and specific technique for the diagnosis of deep-seated lesions.