ABSTRACT
It is important to distinguish between leiomyosarcoma (LMS) and dedifferentiated liposarcoma (DDLS) in the retroperitoneum. The dedifferentiated component of DDLS shows an LMS-like morphology in some cases; thus, detailed evaluation is necessary to achieve an accurate diagnosis. Immunohistochemically, MDM2 and myogenic markers provide clues for the diagnoses. However, immunoreactivity for MDM2 and myogenic markers has not been well studied in retroperitoneal LMS and DDLS. Here, we compared the clinicopathological data of 20 retroperitoneal tumors initially diagnosed as LMS with that of 36 cases of retroperitoneal DDLS and conducted an immunohistochemical study. Four (20%) of the cases initially diagnosed as LMS were immunoreactive for MDM2. Fifteen cases (41.7%) of DDLS showed positive expression of two or more myogenic markers. The patients with LMS with MDM2 overexpression were older than the patients with LMS without MDM2 overexpression (P=0.0328). LMS with MDM2 overexpression showed a worse prognosis than DDLS (P=0.0408). No significant difference in prognosis was found between LMS without MDM2 overexpression and DDLS with myogenic differentiation. In conclusion, we recommend that systemic MDM2 expression analysis be performed in cases of retroperitoneal sarcoma. Overdependence on the expression of myogenic markers could lead to misdiagnosis in distinguishing LMS from DDLS.
Subject(s)
Leiomyosarcoma/diagnosis , Liposarcoma/diagnosis , Retroperitoneal Neoplasms/diagnosis , Adult , Aged , Aged, 80 and over , Biomarkers, Tumor/metabolism , Diagnosis, Differential , Female , Humans , Leiomyosarcoma/metabolism , Leiomyosarcoma/pathology , Liposarcoma/metabolism , Liposarcoma/pathology , Male , Middle Aged , Prognosis , Proto-Oncogene Proteins c-mdm2/metabolism , Retroperitoneal Neoplasms/metabolism , Retroperitoneal Neoplasms/pathologyABSTRACT
Introducción: el cáncer de mama es el más frecuente en las mujeres, se han hecho múltiples esfuerzos para clasificarlo con base en su perfil genético y el perfil de tinción de inmunohistoquímica. El cáncer de mama triple negativo se define por su falta de expresión a receptores de estrógeno, receptores de progesterona y receptor del factor de crecimiento epidérmico humano 2. Representa 15% de todos los cánceres de mama y son más frecuentes en mujeres premenopáusicas afroamericanas. Objetivo: establecer la prevalencia y describir las características clínico-patológicas de las pacientes con Cáncer de Mama triple-negativo que fueron operadas en el servicio de Ginecología y Obstetricia del HCAM en el año 2012. Materiales y métodos: se realizó un estudio descriptivo de corte transversal, en mujeres con diagnóstico histológico confirmado de cancer de mama. Se excluyó a las pacientes cuyos bloques de parafina no se conservaron, o a quienes no se les pudieron realizar todos los marcadores inmunohistoquímicos requeridos por el estudio. Resultados: un total de 159 casos de cáncer de mama invasor tratados quirúrgicamente en el servicio en el 2012, 17 fueron identificados como tumores triple negativos (RE negativo, RP negativo, HER-2 negativo).
Introduction: breast cancer is the most frequent cancer in women; many efforts have been done to classify this cancer based on genetic and immunohistochemical staining profile. Triple-negative breast cancer is defined by a lack of expression of estrogen and progesterone receptor as well as human epidermal growth factor receptor 2. It represents 15% of all types of breast cancer and arises more frequently in premenopausal Afro-American women. Objective: to establish the prevalence and describe the clinic pathologic features of patients with triple-negative breast cancer who were operated in the Obstetrics and Gynecology Ward of the HCAM in 2012. Materials and methods: this was a descriptive cross-sectional study in women with histologically confirmed breast cancer. We excluded patients whose paraffin blocks were not kept or were not able to perform all required immunohistochemical markers for the study. Results: a total of 159 cases of invasive breast cancer treated surgically in service in 2012, 17 were identified as triple negative tumors (ER negative, PR negative, HER-2 negative).
Subject(s)
Humans , Female , Adult , Breast Neoplasms , Immunohistochemistry , Triple Negative Breast Neoplasms , Breast Cancer Lymphedema , Mastectomy , Molecular Biology , Pan American Health Organization , Women , Oligonucleotide Array Sequence Analysis , GeneticsABSTRACT
Objective To investigate the expression of AIB1 protein in bladder cancer and its significance.Methods 30 cases of bladder cancer and 30 adjacent normal tissues were collected from 30 patients underwent radical or TURBt.The level of AIB1 protein expressed in these tissues were detected by immunohitochemical method.Results The positive rate of AIB1 protein in bladder carcinoma was higher than that in the normal tissues [43.3 ％ (13/30) vs 3.3 ％ (1/30),x2 =4.316,P ＜ 0.05].The positive rate of AIB1 in T3 stage was higher than that in T1 or T2 stage [62.5 ％ (5/8) vs 25.0 ％ (2/8),42.9 ％ (6/14),x2 =4.623,P ＜ 0.05].No correlation was found between the expression of AIB1 protein and the sex,age,multiplicity or pathological grade (P ＞ 0.05).Conclusions There is a close relationship between AIB1 and bladder cancer.AIB1 might have great value on the prognosis of patients with bladder cancer.
ABSTRACT
Objective To explore the expressions of matrix metalloproteinases-1(MMP-1) and tissue inhibitor of metalloproteinase-1(TIMP-1) in sternomastoid muscle and explore the pathogenesis of sternomastoid muscle fibrosis in congenital fibra muscular torticollis in children.Methods The hyperplastic state of collagen fiber were determine by Masson collagen stainning method and muscular torticollis and fibra torticollis was differed,obtained 22 cases of the fibra torticollis group.Immunohistochemical method was used to determine the expression of MMP-1 and TIMP-1 in sternomastoid muscle of fibra torticollis and compared them with 6 cases of control group.Results By the immunohistochemical method,the expression of MMP-1 in the experiment group significantly decreased than that in control group(P0.05).Conclusion In congenital fibra torticollis,the sternomastoid muscle fibrosis is related to the decrease of MMP-1.
ABSTRACT
Purpose: To investigate the expression of KAI1 protein and its clinicopathological significance in breast cancer. Methods: Immunohistochemical staining ( S-P method) was used to detect the expression of KAI1 protein in specimens from 107 breast cancer and 30 adjacent normal breast tissues. Results: KAI1 protein positive rate in breast cancer tissues is significantly lower than that of adjacent nomal breast( P 0. 05). Conclusions: These data suggest that in advanced breast cancer, KAI1 is down-regulated and decrease in KAI1 ecpression plays an important role in the malignant progression of breast cancer. Therefore, detection of KAI1 protein might be a potentially valuable indicator for staging human breast cancer and predicting prognosis.
