Feline Injection-Site Sarcoma

Feline injection-site sarcoma (FISS) is an aggressive tumor believed to arise from the proliferation of fibroblasts and myofibroblasts in areas of chronic inflammation, particularly at sites of injection. Local recurrence is frequent after surgical excision. Gelatinases (MMP-2 and MMP-9) and their inhibitor (TIMP-2) are endopeptidases pivotal in extracellular matrix remodeling and therefore in tumor invasiveness. The aim of this study was to investigate the immunohistochemical expression of MMP-2, MMP-9, and TIMP-2 in FISS to assess their usefulness as prognostic factors. Size, soft tissue sarcoma (STS) grading system, depth of infiltration, surgical margins, and Ki-67 index were evaluated as additional prognostic markers. Twenty-four cases of primary FISS were classified according to clinical follow-up as nonrecurrent (NR, n = 14; 58.3%) and recurrent (R, n = 10; 41.7%). MMP-2, MMP-9, and TIMP-2 were variably expressed in the FISS examined, confirming their role in tumor invasiveness, yet they did not show significant differences between the R and NR groups. These results could be due to different tumor stages or to the multiple activities of these enzymes, not limited to ECM remodeling. The immunohistochemical expression of these enzymes considered alone does not seem to be useful as a prognostic marker. STS grading system, depth of infiltration, surgical margins, and Ki-67 index did not relate to recurrence. Instead, the size of the tumor, measured after formalin fixation, with an optimal cutoff of 3.75 cm (accuracy = 86%; P < .05), and the mitotic count, with an optimal cutoff of 20 mitoses/10 HPF (accuracy = 80%; P < .05), could be evaluated as useful prognostic markers.

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Prognostic significance of contemporary prostate cancer grading system in tumours with positive surgical margins

10.26226/morressier.578f37ffd462b8028d890475 ◽

2016 ◽

Author(s):

Gordana Dordevic

Keyword(s):

Prostate Cancer ◽

Prognostic Significance ◽

Surgical Margins ◽

Grading System ◽

Positive Surgical Margins ◽

Cancer Grading

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Immunohistochemical expression of HER ‐ 2 and Ki ‐ 67 in granulosa cell tumor in bitches

Reproduction in Domestic Animals ◽

10.1111/rda.13903 ◽

2021 ◽

Author(s):

Ana Carina Heil da Silva Matos ◽

Angélica Consalter ◽

Bárbara Paula Santos Batista ◽

Ana Beatriz Monteiro Fonseca ◽

Ana Maria Reis Ferreira ◽

...

Keyword(s):

Granulosa Cell ◽

Granulosa Cell Tumor ◽

Cell Tumor ◽

Immunohistochemical Expression ◽

Ki 67 ◽

Her 2

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Analysis of the immunohistochemical expressions of p53, bcl-2 and Ki-67 in colorectal adenocarcinoma and their correlations with the prognostic factors

Arquivos de Gastroenterologia ◽

10.1590/s0004-28032010000200005 ◽

2010 ◽

Vol 47 (2) ◽

pp. 141-147 ◽

Cited By ~ 19

Author(s):

Hunaldo Lima de Menezes ◽

Mário Jorge Jucá ◽

Edmundo Guilherme de A. Gomes ◽

Benício L. Bulhões B. P. Nunes ◽

Henrique Oliveira Costa ◽

...

Keyword(s):

Prognostic Factors ◽

Cell Differentiation ◽

Colorectal Adenocarcinoma ◽

Sao Paulo ◽

Immunohistochemical Expression ◽

Ki 67 ◽

Disease Free Interval ◽

Free Interval ◽

Specific Mortality ◽

Disease Free

CONTEXT: Search of tumors markers that allow treatment with higher survival rates, and indicate the response to treatment and recurrence of cancer OBJECTIVE: To analyze the immunoexpression of the proteins p53, bcl-2 and Ki-67 in colorectal adenocarcinoma and correlate them with the clinical-pathological prognostic factors. METHOD: Tissue microarray paraffin blocks were made from colorectal adenocarcinoma tissue resected from 82 patients who had undergone surgery but not chemotherapy or radiotherapy, at "Hospital São Paulo", São Paulo, SP, Brazil, between 2002 and 2005. Thin sections (4 µm) were subjected to immunohistochemical reactions, and immunoexpression staining scores were obtained. The scores were correlated with the degree of cell differentiation, staging, disease-free interval, recurrence, survival and specific mortality. The study variables were analyzed using the chi-square and Kaplan-Meier tests to investigate associations with the markers. The significance of the differences between the curves of the disease-free interval and survival was analyzed using the Logrank and Wilcoxon tests. RESULTS: The immunohistochemical expression of p53 was positive in 70 tumors (85.4%) and negative in 12 (14.6%). The expression of bcl-2 was positive in 26 (31.7%) and negative in 56 (68.3%). The expression of Ki-67 was positive in 62 (75.6%) and negative in 20 (24.4%). There was no statistically significant correlation between the expressions of these markers separately or in conjunction, in relation to the degree of cell differentiation, staging, disease-free interval, survival and specific mortality. In relation to recurrence, there was a statistically significant correlation with positive expression of Ki-67 (P = 0.035). CONCLUSION: The immunohistochemical expression of Ki-67 in colorectal cancer is associated with recurrence of this disease.

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Ancillary techniques on the evaluation of canine cutaneous mast cell tumors from Brazil

Ciência Rural ◽

10.1590/0103-8478cr20160255 ◽

2016 ◽

Vol 46 (10) ◽

pp. 1804-1810 ◽

Cited By ~ 1

Author(s):

Mariana Martins Flores ◽

Renata Dalcol Mazaro ◽

Ingeborg Maria Langohr ◽

Alma Roy ◽

Keith Strother ◽

...

Keyword(s):

Mast Cell ◽

Pcr Amplification ◽

The United States ◽

Growth Fraction ◽

Grading System ◽

Low Grade ◽

Ki 67 ◽

Mast Cell Tumors ◽

Cutaneous Mast Cell ◽

Exon 11

ABSTRACT: The use of histologic classification by a 2-tier grading system only, immunohistochemistry (IHC) for KIT and Ki-67 and polymerase chain reaction (PCR) for internal tandem duplications (ITD) on exon 11 has improved the prognostication of canine cutaneous mast cell tumors (CCMTs) particularly in the United States. However, these techniques are not commonly used in most Brazilian laboratories. Likewise, no studies, to date, have investigated the occurrence of ITD in CCMTs from the country. Thus, this study tested the 2-tier grading system, the immunohistochemistry for KIT and Ki-67 and the PCR for exon 11 in a group of Brazilian CCMTs with the goal of investigating the applicability of these tests in a Brazilian laboratory. Of the 39 CCMTs, 69.2% (27/39) were identified as low-grade and 30.8% (12/39) as high-grade by a 2-tier grading system. All tumors had a KIT expression pattern II, and 30.6% (11/36) had a high growth fraction (Ki-67). PCR amplification was successful in four of the 11 tumors examined. Two of these (50%) were positive for ITD. This study highlights the importance of using auxiliary techniques in the CCMT evaluation, identifies limitations and confirms the applicability of these methods on a routine diagnostic basis in Brazil. Our results will help to improve the prognostication of CCMTs in Brazilian diagnostic laboratories, encouraging the use of supplementary methods.

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