Expression of histo-blood group antigens in bronchial squamous metaplasia.

The aim of the present study was to evaluate the expression of blood group antigens in squamous bronchial metaplasia in order to determine whether this factor could identify patients at risk of lung cancer. In total, 100 bronchial biopsies were included in the present study. The cases were classified according to the World Health Organization grading system. Immunohistochemical stains for histo-blood groups A and B, and reactivity tests to p53 and the cellular proliferation index were performed. A total of 56 (56%) patients belonged to blood group A. Among them, six (10.7%) patients who did not express antigen in squamous metaplasia, showed carcinoma at the moment of the biopsy (n = 3) or developed synchronous lung carcinoma (n = 3). A total of nine (9%) patients belonged to blood group B. Loss of antigenic expression was observed in five cases. All of them developed synchronous lung carcinoma. The patients with low- and high-grade dysplasia developed lung cancer in 71 and 100% of the cases, respectively. In conclusion, the findings of the present study suggest that the loss of histo-blood antigens expression is an event in the carcinogenesis of bronchial mucosa and it is usually associated with high-grade lesions and hyperproliferative activity.

Mucoepidermoid tumors of the bronchus. Ultrastructural and immunohistochemical study. Histiogenic correlations.

UNLABELLED: Bronchial mucoepidermoid tumors are uncommon neoplasms, morphologically similar to their salivary gland counterpart. The histogenesis is controversial. The aim of this study is to identify myoepithelial cells and speculate on their role in the origin of these tumors. METHODS AND RESULTS: Sixteen bronchial mucoepidermoid tumor surgical specimens were formalin-fixed, paraffin-embedded and studied using a panel of nine antibodies in order to identify a myoepithelial differentiation. Additional antigens against several cytokeratins were performed in four cases and five of the biopies were studied using the electron microscopy. The different types of cells of the primary bronchial mucoepidermoid tumor (mucous luminal, intermediate and squamous) reacted strongly against AE1, CK7, 34bE12 and weakly with AE3, CK18 and CK8/18/19. S-100, alpha-smooth muscle actin, muscle actin HHF35 and alpha-actinin were consistently negative in all cell types. CD10 was positive in very few cells in just one case. CONCLUSION: The immunohistochemical and the ultrastructural study of bronchial mucoepidermiod tumors support a ductal unit origin, without a myoepithelial participation.

[Clinicopathological features of solitary fibrous tumors of the pleura: a case series and literature review]. / Tumor fibroso solitario pleural: características clinicopatológicas de una serie de casos y revisión de la bibliografía.

We assessed the clinicopathological features of solitary fibrous tumors of the pleura in a case series comprising 30 patients (20 women, 66.6%) with a mean age of 58.39 years. Forty-five percent of the cases were asymptomatic. In 70% of the cases the tumors arose in the visceral pleura. Twenty percent presented multiple tumors, a finding that was associated with intrapulmonary localization and malignant behavior (P<.0001) Histology revealed low cell density in 15% of the cases, moderate density in 50%, and high density in 35%; further findings showed atypia in 45% of the cases, necrosis in 25%, and hemorrhage in 15%. More than 4 mitoses per 10 high-power fields were noted in 30% of the cases. Immunohistochemistry results were positive for vimentin in all cases; cells were CD34+ in 85% of the cases, BCL2+ in 65%, and CD99+ in 40%. Findings for keratin and protein S100 were negative in all cases. Malignant biological behavior (local recurrence and metastasis) was observed in 4 cases, 2 of which were CD34-. Solitary fibrous tumors of the pleura are uncommon neoplasms with unpredictable biological behavior; follow-up should therefore be based on early detection of recurrence or metastasis.

Cannibalism in paranoid schizophrenia: a case report.

In ancient times, cannibalism was deemed acceptable for reasons of survival when faced with extreme need or for religious or magic reasons. In today's society, these cases are extremely rare and are generally associated with severe mental illness. We present a case of cannibalism in an individual with schizophrenia. The patient who lacked insight into his illness admitted to committing acts of cannibalism and offered in-depth explanations of the procedures used to prepare the bodies. He made statements on television and to the press and was given the nickname of "the people-eater", an identity he readily accepted and integrated into his system of delusions. Cases of this nature are exceedingly unusual, but the fact that people with schizophrenia commit uncommon, unpredictable crimes attracts the media. This circumstance not only interferes with the natural course of the disease, but also affects the therapeutic behavior and how the patient is perceived by society.

Canibalismo en esquizofrenia paranoide: a propósito de un caso / Cannibalism in paranoid schizophrenia: a case report

En la antigüedad el canibalismo ha sido propiciado por factores de supervivencia ante una necesidad extrema o por razones mágicas o religiosas. En nuestra sociedad actual estos casos son de extrema rareza y se suelen asociar a personas con enfermedades mentales graves. Exponemos el caso de una persona con esquizofrenia y canibalismo. El paciente, sin conciencia de enfermedad mental, admitió los actos de canibalismo y explicó detalladamente los procedimientos para la preparación de los cuerpos. Realizó declaraciones en televisión y prensa y se le puso el sobrenombre de «el come gente», identificación que asumió rápidamente e integró a su sistema de delirios. Este tipo de casos son extremadamente raros, pero el hecho de que los pacientes con esquizofrenia cometan crímenes fuera de lo común y no previsibles atrae a los medios de comunicación. Esta circunstancia no sólo provocó interferencia en la evolución natural de la enfermedad, sino también en la conducta terapéutica y la visión social del paciente

In ancient times, cannibalism was deemed acceptable for reasons of survival when faced with extreme need or for religious or magic reasons. In today's society, these cases are extremely rare and are generally associated with severe mental illness. We present a case of cannibalism in an individual with schizophrenia. The patient who lacked insight into his illness admitted to committing acts of cannibalism and offered in-depth explanations of the procedures used to prepare the bodies. He made statements on television and to the press and was given the nickname of «the people-eater», an identity he readily accepted and integrated into his system of delusions. Cases of this nature are exceedingly unusual, but the fact that people with schizophrenia commit uncommon, unpredictable crimes attracts the media. This circumstance not only interferes with the natural course of the disease, but also affects the therapeutic behavior and how the patient is perceived by society

Tumor fibroso solitario pleural: características clinicopatológicas de una serie de casos y revisión de la bibliografía / Clinicopathological features of solitary fibrous tumors of the pleura: a case series and literature review

Hemos evaluado las características clinicopatológicas del tumor fibroso solitario pleural en una serie de 30 casos. El 70% de los pacientes eran mujeres. El promedio de edad fue de 58,39 años. El 45% de los casos fueron asintomáticos. La localización más frecuente fue la pleura visceral (70%). En el 20% de los casos se observaron tumoraciones múltiples y se asociaron a localización intrapulmonar (p < 0,0001). Histológicamente mostraron densidad celular escasa en el 15% de los casos, moderada en el 50% e intensa en el 35%; atipia en el 45%; necrosis en el 25%; hemorragia en el 15%, y mitosis mayor de 4 por 10 campos en el 30%. La inmuhistoquímica mostró positividad para vimentina (100%), CD34 (85%), BCL2 (65%) y CD99 (40%), y negatividad en el 100% de los casos para queratinas y la proteína S100. Cuatro pacientes presentaron un comportamiento biológico maligno (recurrencia local y metástasis); en 2 de ellos el CD34 había sido negativo. El tumor fibroso solitario pleural es una neoplasia poco común de comportamiento biológico impredecible, por lo que el seguimiento debe centrarse en la detección precoz de la recurrencia o de metástasis

We assessed the clinicopathological features of solitary fibrous tumors of the pleura in a case series comprising 30 patients (20 women, 66.6%) with a mean age of 58.39 years. Forty-five percent of the cases were asymptomatic. In 70% of the cases the tumors arose in the visceral pleura. Twenty percent presented multiple tumors, a finding that was associated with intrapulmonary localization and malignant behavior (P<.0001) Histology revealed low cell density in 15% of the cases, moderate density in 50%, and high density in 35%; further findings showed atypia in 45% of the cases, necrosis in 25%, and hemorrhage in 15%. More than 4 mitoses per 10 high-power fields were noted in 30% of the cases. Immunohistochemistry results were positive for vimentin in all cases; cells were CD34+ in 85% of the cases, BCL2+ in 65%, and CD99+ in 40%. Findings for keratin and protein S100 were negative in all cases. Malignant biological behavior (local recurrence and metastasis) was observed in 4 cases, 2 of which were CD34­. Solitary fibrous tumors of the pleura are uncommon neoplasms with unpredictable biological behavior; follow-up should therefore be based on early detection of recurrence or metastasis

Antigenic profile of human bronchial gland.

Bronchial glands have been regarded as modified salivary glands. It is well known that there no previous reviews concerning the antigenic profile of the bronchial wall. The aim of this study is a systematic survey of the antigenic profile and to describe the histology of normal human bronchial glands. Six formalin-fixed, paraffin-embedded surgical specimens were studied using a panel of 22 polyclonal and monoclonal antibodies by the avidin-biotin-peroxidase method. Bronchial glands disclosed a tubuloacinar structure. The smallest ducts intercalated originated from a cluster of secretory acini and converge to form an excretory duct. No striated duct was observed. Acinar united is composed by mucous, serous and mixed units. Myoepithelial cells are found in relation to the intercalated ducts and secretory acinis. Secretory cells of bronchial glands reacted strongly with cytokeratin AE1 and moderately for CK7, CK18. Additionally, serous acinar cells reacted with AE3, CK19, CK5/6/8/18, CK8/18/19, and Leu7. Myoepithelial cells reacted strongly with a-smooth muscle actin, CD10 and CK34betaE12. Ductal system cells differed from acinar secretory cells in expressing CK34betaE12 and HSP27. In conclusion, the detailed knowledge of the immunohistochemical reactivities of normal cell types of normal human bronchial glands will prove useful in studies of bronchial pathology, especially of neoplastic processes.