Identifying malignant mesothelioma by a pathological survey using the São Paulo state hospital cancer registry, Brazil.

Objective: To review the pathological diagnosis of possible cases and/or hidden cases of malignant mesothelioma (MM) between 2000 and 2012 using the Hospital-Based Cancer Registry database in the state of São Paulo, Brazil.

Methods: Possible cases were retrieved by assessing the database. Inclusion criteria were being older than 30 years of age and having ICD-O-3 topography and morphology codes related to MM.

Mesothelioma in situ with regressive malignant pleural effusion and an unexpected evolution: A case report.

Malignant pleural mesothelioma (MPM) is an aggressive neoplasm that originates from hyperplasia and metaplasia of the mesothelial cells that cover the pleural cavity. Previous exposure to asbestos is the main risk factor. Since MPM is often diagnosed at an advanced stage with rapid evolution and resistance to treatment, it is associated with an unfavorable outcome.

Value of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) in the diagnosis of lung and mediastinal lesions.

Objective: To evaluate the value of EBUS-TBNA in the diagnosis of lung and mediastinal lesions.

Methods: Prospective cohort study that included 52 patients during a 2-year period (2016 to 2018) who underwent EBUS-TBNA.

Results: Among the 52 individuals submitted to the procedure, 22 (42.

Donor-Derived Transmission of Cryptococcus gattii sensu lato in Kidney Transplant Recipients.

We describe cases of donor-derived transmission of Cryptococcus deuterogattii in 2 kidney transplant recipients in Brazil and published information on other cases. Prompt reduction of immunosuppression and initiation of antifungal therapy was required to successfully control the fungal infections and preserve engraftment.

NEUROENDOCRINE TUMOR IN A CHILD WITH COMMON VARIABLE IMMUNODEFICIENCY.

Objective: To report a case of a child with primary immunodeficiency who at eight years developed digestive symptoms, culminating with the diagnosis of a neuroendocrine tumor at ten years of age.

Case Description: One-year-old boy began to present recurrent pneumonias in different pulmonary lobes. At four years of age, an immunological investigation showed a decrease in IgG and IgA serum levels.

Lung cancer biopsy: Can diagnosis be changed after immunohistochemistry when the H&E-Based morphology corresponds to a specific tumor subtype?

Objectives: Advancements in non-small cell lung cancer treatment based on targeted therapies have made the differentiation between adenocarcinoma and squamous cell carcinoma increasingly important. Pathologists are challenged to make the correct diagnosis in small specimens. We studied the accuracy of an immunohistochemical panel in subclassifying non-small cell lung cancer in routine small biopsies and compared the results with the diagnosis from resected lung specimens, autopsy samples or biopsied/resected metastases.

Juvenile-onset recurrent respiratory papillomatosis with pulmonary involvement and carcinomatous transformation.

Papilloma associated with recurrent respiratory papillomatosis (RRP), caused by human papilloma virus (HPV) infection types 6 and 11, is the most common benign neoplasm of the larynx. The clinical features of RRP vary widely from mild to aggressive forms. RRP in children is known as juvenile-onset recurrent respiratory papillomatosis (JORRP).

Neuroendocrine tumors: An epidemiological study of 250 cases at a tertiary hospital.

Objective: To compare the frequency of neuroendocrine tumors in our service with that reported in the literature considering age, gender, location, degree of differentiation and increase in incidence by means of a retrospective study.

Method: Search of variables from a database of neuroendocrine tumor cases diagnosed at the Department of Pathological Sciences, Hospital da Santa Casa de São Paulo over the past 10 years, relating them to epidemiological data such as gender, age, distribution across organs, most-used immunohistochemical markers and presence or absence of either lymph node or distant metastases.

Results: In all, 250 cases were reviewed, 133 involving females, predominantly in the 61-70 age range.

Acute tracheobronchitis caused by Aspergillus: case report and imaging findings.

Acute tracheobronchitis is a rare manifestation of invasive aspergillosis, generally occurring in severely immunocompromised patients. The authors report the case of a patient presenting with this condition after bone-marrow transplantation, with emphasis on tomographic findings.

Cardiac angiosarcoma: an unexpected diagnosis.

Cardiac angiosarcoma is a rare entity. The incidence through autopsy findings ranges between 0.001% and 0.

Immunopathological aspects of schistosomiasis-associated pulmonary arterial hypertension.

Objectives: Pulmonary hypertension is a lethal complication of chronic hepatosplenic schistosomiasis. Little is known of the underlying (immuno-)histopathological characteristics of lung vasculopathy.

Methods: We characterized vasculopathy and inflammation in lung tissue of 10 patients with Schistosomiasis-associated PH (SCH-PH) in comparison to 22 idiopathic pulmonary arterial hypertension (IPAH) patients and 10 normal controls.

Minimally invasive adenocarcinoma of the lung in a young patient treated for osteosarcoma.

Although children with osteosarcoma have a higher incidence of a 2nd malignancy than the general population, its development in the lung is rare. The few reported cases belong to examples of carcinomas. Here we present the case of a 13-year-old boy with a primary pulmonary adenocarcinoma diagnosed 3 years after the osteosarcoma diagnosis and present a review of the literature.

Endosonography vs conventional bronchoscopy for the diagnosis of sarcoidosis: the GRANULOMA randomized clinical trial.

Importance: Tissue verification of noncaseating granulomas is recommended for the diagnosis of sarcoidosis. Bronchoscopy with transbronchial lung biopsies, the current diagnostic standard, has moderate sensitivity in assessing granulomas. Endosonography with intrathoracic nodal aspiration appears to be a promising diagnostic technique.

Mucosa-associated lymphoid tissue lymphoma of the trachea: case report.

Context: Mucosa-associated lymphoid tissue (MALT) lymphomas are most commonly found in the stomach, lungs, orbital soft tissue, salivary glands and thyroid. Involvement of the trachea is extremely rare.

Case Report: This report describes a rare case of MALT lymphoma of the trachea in a 71-year-old woman who presented with a one-year history of coughing, dyspnea, hoarseness and weight loss.

Giant multilocular thymic cyst in an HIV-infected adolescent.

A girl with vertically acquired HIV infection presented with a 6-month history of dyspnea and chest pain. Computed tomography of the thorax showed a heterogenous mass measuring 13 × 9 × 17 cm located in the anterior mediastinum. Complete surgical resection was accomplished with no complications.

Differential elemental distribution of retained particles along the respiratory tract.

Context: Prolonged exposure to ambient particles is associated with premature mortality due to cardio-respiratory diseases and lung cancer. The size and composition of these particles determine their toxicity, which is aggravated by their long-term retention in the lungs.

Objective: To compare the elemental profile of particles retained along the bronchial tree and lymph nodes by combining laser capture microdissection (LCM) and elemental composition analysis through energy dispersive x-ray (EDX) and scanning electron microscopy (SEM).

A very rare cause of dyspnea with a unique presentation on a computed tomography scan of the chest: macrophage activation syndrome.

Macrophage activation syndrome is a rare and potentially life-threatening disease. It occurs due to immune dysregulation manifested as excessive macrophage proliferation, typically causing hepatosplenomegaly, pancytopenia and hepatic dysfunction. Here, we report an unusual case of macrophage activation syndrome presenting as dyspnea, as well as (reported here for the first time) high resolution computed tomography findings of an excavated nodule, diffuse ground glass opacities and consolidations (mimicking severe pneumonia or alveolar hemorrhage).

Fatal outcome in bronchus-associated lymphoid tissue lymphoma.

Primary pulmonary lymphoma is rare. The most common histological type is the bronchus-associated lymphoid tissue lymphoma. This type of lymphoma has an indolent course and excellent response to therapy.

Tuberculosis of the thymus.

Tumors of the anterior mediastinum include several entities with different radiological and clinical manifestations, constituting a heterogeneous group of congenital, inflammatory, and neoplastic conditions. Among these lesions, the most common primary tumor of the mediastinum is thymoma, nearly followed by germ cell tumors and lymphomas. Tuberculosis of the thymus, an extremely rare condition, typically involves the mediastinal lymph nodes.

Detection of SS18-SSX fusion transcripts in formalin-fixed paraffin-embedded neoplasms: analysis of conventional RT-PCR, qRT-PCR and dual color FISH as diagnostic tools for synovial sarcoma.

Synovial Sarcoma consistently harbors t(X;18) resulting in SS18-SSX1, SS18-SSX2 and rarely SS18-SSX4 fusion transcripts. Of 328 cases included in our study, synovial sarcoma was either the primary diagnosis or was very high in the differential diagnosis in 134 cases: of these, amplifiable cDNA was obtained from 131. SS18-SSX fusion products were found in 126 (96%) cases (74 SS18-SSX1, 52 SS18-SSX2), using quantitative and 120 by conventional reverse transcriptase-polymerase chain reaction (RT-PCR).

Tissue maturation correlating to clinical manifestations in juvenile angiofibroma.

Objectives: Juvenile nasopharyngeal angiofibroma is a rare benign tumor that affects young male patients and shows a characteristic development from its origin. It is not a true neoplasm, but shows features of vascular processes, developing into a more fibrous condition. The aim of this study was to correlate the clinical manifestations and the histologic findings of the tumor.

Nuclear markers (star volume, mitotic index, AgNOR and Ki-67) of the primary tumor and its metastasis in non-small cell lung carcinomas.

Although tumor growth is controlled by growth rate and cell cycle, it is also likely that the proliferative activity of tumor cells can influence the growth rate of the primary cancer and account for their aggressiveness. Variations in growth rate, cell cycle control and proliferative activity could, in part, explain differences in invasive and metastatic properties among non-small cell lung carcinomas (NSLC). The purpose of this report is to: (1) evaluate growth rate by using growth- and cell cycle-regulating markers (mitotic count, nuclear star volume, AgNOR, and Ki-67) as reflections of growth rate and (2) compare the indices of primary NSLC with the indices of their metastasis in a series of patients with advanced disease.