Epidemiological, clinical, and prognostic analysis of oral squamous cell carcinoma diagnosed and treated in a single hospital in Galicia (Spain): a retrospective study with 5-year follow-up.

BACKGROUND: Oral cancer is a common neoplasm worldwide, mostly corresponding to squamous cell carcinoma (OSCC). Unfortunately, its overall prognosis remains poor, with no improvement in recent decades. In this study, we have analysed the epidemiological, clinical, and prognostic characteristics of OSCC on patients of a specific Spanish region (Galicia), in order to improve its prognosis and apply effective preventive and early diagnosis measures. MATERIAL AND METHODS: We retrospectively analysed 243 cases of OSCC, diagnosed and treated in a single hospital centre in Galicia between 2010 and 2015 (minimum of 5 years of evolution). Overall and specific survival were calculated (Kaplan-Meier) and associated variables were identified (log rank test and Cox regression). RESULTS: The mean age of the patients was 67 years, with the majority being male (69.5%), smokers (45.9%) and alcohol consumers (58.6%), who lived in non-urban areas (79.4%). Cases diagnosed at advanced stages entailed the 48.1% of the sample, and 38.7% of cases relapsed. The 5-year overall and disease-specific survival rates were 39.9% and 46.1%, respectively. Patients who consumed tobacco and alcohol had a worse prognosis. OSCC cases referred to hospital by specialist dentists had a better prognosis, as those who were previously diagnosed with an oral potentially malignant oral disorder (OPMD) or received dental care during OSCC treatment. CONCLUSIONS: In view of these findings, we conclude that OSCC in Galicia (Spain) still has a very poor overall prognosis, which is mainly related to the advanced age of the patients and the late diagnosis. Our study highlights the better survival of OSCC in relation to the referring health professional, the presence of a previous OPMD and the dental care after diagnosis. This demonstrates the importance of dentistry as a health profession involved in the early diagnosis and multidisciplinary management of this malignant neoplasm.

CT-Based Radiomics to Predict KRAS Mutation in CRC Patients Using a Machine Learning Algorithm: A Retrospective Study.

Colorectal cancer (CRC) is one of the most common types of cancer worldwide. The KRAS mutation is present in 30-50% of CRC patients. This mutation confers resistance to treatment with anti-EGFR therapy. This article aims at proving that computer tomography (CT)-based radiomics can predict the KRAS mutation in CRC patients. The piece is a retrospective study with 56 CRC patients from the Hospital of Santiago de Compostela, Spain. All patients had a confirmatory pathological analysis of the KRAS status. Radiomics features were obtained using an abdominal contrast enhancement CT (CECT) before applying any treatments. We used several classifiers, including AdaBoost, neural network, decision tree, support vector machine, and random forest, to predict the presence or absence of KRAS mutation. The most reliable prediction was achieved using the AdaBoost ensemble on clinical patient data, with a kappa and accuracy of 53.7% and 76.8%, respectively. The sensitivity and specificity were 73.3% and 80.8%. Using texture descriptors, the best accuracy and kappa were 73.2% and 46%, respectively, with sensitivity and specificity of 76.7% and 69.2%, also showing a correlation between texture patterns on CT images and KRAS mutation. Radiomics could help manage CRC patients, and in the future, it could have a crucial role in diagnosing CRC patients ahead of invasive methods.

Comparison of three sampling instruments, Cytobrush, Curette and OralCDx, for liquid-based cytology of the oral mucosa.

Exfoliative cytology of the oral cavity is a simple and noninvasive technique that permits the study of epithelial cells. Liquid-based cytology is an auxiliary diagnostic tool for improving the specificity and sensitivity of conventional cytology. The objective of our study was to compare the quality of normal oral mucosa cytology samples obtained using three different instruments, Cytobrush®, dermatological curette and Oral CDx® for liquid-based cytology. One hundred four cytological samples of oral cavity were analyzed. Samples were obtained from healthy volunteer subjects using all three instruments. The clinical and demographic variables were age, sex and smoking habits. We analyzed cellularity, quality of the preparation and types of cells in the samples. All preparations showed appropriate preparation quality. In all smears analyzed, cells were distributed uniformly and showed no mucus, bleeding, inflammatory exudate or artifacts. We found no correlation between the average number of cells and the type of instrument. The samples generally consisted of two types of cells: superficial and intermediate. No differences were found among the cytological preparations of these three instruments. We did not observe basal cells in any of the samples analyzed.

Non-computer-assisted liquid-based cytology for diagnosis of oral squamous cell carcinoma.

The development of oral squamous cell carcinoma (OSCC) occasionally follows the neoplastic progression of other premalignant lesions. Although biopsy is the definitive diagnostic method, liquid-based cytology is an adequate method for screening suspicious lesions. We compared liquid-based cytology to histology for diagnosis of OSCC in patients with oral lesions that raised clinical suspicion of malignancy. Our sample consisted of 48 patients. Cytological samples were obtained by scraping the lesion superficially using Cytobrush®. We conducted cytological and histopathological evaluation of all preparations. We estimated sensitivity and specificity levels as well as positive and negative predictive values. The degree of inter-observer agreement for both methods was assessed using the kappa index. Twenty-eight (58.3%) of the cases finally were diagnosed with OSCC and 20 (41.7%) were determined to be premalignant lesions. We observed eight false negatives and no false positives; OSCC prevalence was 56.5%. The values for diagnostic indices were: sensitivity, 69% (CI 95%, prevalence 51.87); specificity, 100%; positive predictive value, 100%; negative predictive value, 71% (CI 95% 54.82). A kappa index of 0.622 (CI 95% 0.93, 0.39) was observed.

Immunohistochemical localization of C1 subunit of V-ATPase (ATPase C1) in oral squamous cell cancer and normal oral mucosa.

The ATP6V1C1 gene encodes the C1 subunit of the vacuolar-ATPase (V-ATPase) proton pump. This gene is over-expressed in oral squamous cell carcinoma (OSCC) as determined by real-time quantitative polymerase chain reaction. The aim of our study was to perform an immunohistochemical study of the distribution of the C1 subunit in normal epithelium of the oral cavity and in OSCC. We analyzed the expression of the C1 subunit in eight OSCC samples and two normal oral mucosa samples using polyclonal V-ATPase C1 antibody (clone H-300). In the normal oral mucosa samples, C1 subunit staining was observed in the basal and intermediate layers of the epithelium. No staining was visible in the keratinized superficial layers. More intense staining was observed in the OSCC samples, with the predominant expression at the periphery of tumor nests and absence of expression in dyskeratotic areas. C1 subunit expression in tumor cells was predominantly cytoplasmic, although there was perinuclear and nuclear expression in some samples. These findings demonstrate that V-ATPase is necessary for proper epithelial functioning and show its importance in the development of OSCC as evidenced by the over-expression of ATP6V1C1 in OSCC.

Pharmacodiagnostic evaluation of EGFR expression in oral squamous cell carcinoma.

OBJECTIVE: To determine epidermal growth factor receptor (EGFR) expression in oral squamous cell carcinomas (OSCC), and its possible relationships with clinical findings, histological findings, disease course and prognosis. MATERIALS AND METHODS: Surgical specimens of 47 OSCCs were studied immunohistochemically for detection of EGFR using a standardized immunohistochemical detection system (EGFR PharmaDx kit). Statistical analysis was used to investigate possible relationships between EGFR expression and clinical findings, histological findings, cell proliferation (MIB1 labelling index), disease course and patient survival. RESULTS: Epidermal growth factor receptor expression was absent or weak in 12 cases (25.5%) and moderate or intense in 35 cases (74.5%). However, EGFR expression did not show statistically significant associations with any of the clinical, histological, biological or prognostic variables considered. CONCLUSION: First, despite previous suggestions that EGFR is a useful indicator of biological tumour behaviour, the present results suggest that EGFR is not a useful indicator of prognosis in OSCC. Secondly, the high prevalence of EGFR overexpression suggests that the possibility of anti-EGFR therapy in OSCC merits further investigation.

[Tuberculosis in Santiago de Compostela from 1999 to 2002. An epidemiological study]. / Tuberculosis en el área de Santiago de Compostela durante los años 1999, 2000, 2001 y 2002. Un estudio epidemiológico.

OBJECTIVE: The purpose of this study was to determine the epidemiological characteristics of tuberculosis (TB) in the Public Health System District of Santiago de Compostela (population : 386125) from 1999 to 2002. METHODS: Inclusion criteria were: 1). microbiological and/or pathological diagnosis of TB in any specimen, and 2). patient younger 35 years old with recent medical history of TB. Mantoux test positive, and pleural effusion with linfocitosis and adenosine deaminase >47 IU/ml. RESULTS: 946 patients were included (568 men and 378 women), with ages ranging from 2 months to 96 years. The incidence of TB was 60.9/100000 in 1999, 67.6/100000 in 2000, 61.9/100000 in 2001 and 54.6/100000 in 2002. The incidence rate of tuberculous meningitis was 1.03/100000 in 1999 and 2000, 0.77/100000 in 2001 and 0.51/100000 in 2002. The percentage of cases associated with HIV was 3.4% in 1999, 1.9% in 2000, 2.4% in 2001 and 2002. We found an increase in the rate of males over 55 years of age; with incidence per 100000 inhabitants of 122.4 in 1999, 142.8 in 2000, 115 in 2001 and 119 in 2002, whereas in females the incidence was 40.6 in 1999, 60.9 in 2000, 54.1 in 2001 and 39.1 in 2002. CONCLUSIONS: In last four years the incidence of tuberculosis has decreased but remains high in males over 55 years old.

Bronchoesophageal fistulae secondary to tuberculosis.

An elderly patient with a bronchoesophageal fistula secondary to tuberculosis and a 3-month history of cough and dysphagia worsening with deglutition was admitted to hospital. Radiological examination and CT of the thorax revealed mediastinal adenopathy. Bronchoscopy, esophagoscopy and esophagraphy confirmed the presence of a bronchoesophageal fistula. Histological examination of the esophagus and bronchial biopsy specimens revealed nonnecrotic granulomas, and the acid-fast bacilli tested positive for Mycobacterium tuberculosis in respiratory secretions. Antituberculous treatment was started after diagnosis of intrathoracic lymph node tuberculosis with bronchoesophageal fistulization. A month and a half after initiating treatment, paroxistic coughing during deglutition persisted. An esophagoscopy was performed, and the orifice was closed with a fibrin tissue. After 9 months of treatment, the patient was asymptomatic and in good health.

Eosinophilic granuloma as a form of inflammatory reaction. A case report.

Eosinophilic granuloma consists of the proliferation and/or accumulation of Langerhans cells in the bones, generally of the cranium and face, as a uni- or multifocal cystic lesion. It is considered to be a localized chronic form of Langerhans cell disease. The most frequent oral location is the posterior part of the mandible, where the bone lesion often gives rise to lesions of the overlying soft tissues. We report a case showing bilateral involvement of the upper jaw and unilateral involvement of the mandible. The eosinophilic granulomas arose in association with odontogenic periapical infectious processes, suggesting that this disorder may be a form of inflammatory response.

Anaesthesia of the right lower hemilip as a first manifestation of multiple myeloma. Presentation of a clinical case.

Multiple myeloma is a malignant proliferation of plasma cells. It may affect any of various bones, causing osteolytic lesions with a characteristic "punched out" radiographic appearance. The commonest symptom is bone pain. One of the most frequent locations is the mandible. Symptoms of multiple myeloma of the mandible include tumefaction, non-specific pain, tooth mobility and sometimes loss, and paraesthesia of the dental nerve. Here we report a case of multiple myeloma of the mandible which was unusual in that the presenting complaint was anaesthesia of the right lower hemilip.

[Ultrastructural differences between leukoplakia with and without dysplasia]. / Différences ultrastructurelles entre la leucoplasie sans et avec dysplasie.

Leukoplakias with similar clinical appearances have presented with very different histopathological characteristics. In this study we investigate in depth the cellular ultrastructure of the tissues which determines the clinical behaviour of these lesions.

[Tuberculosis and HIV infection. Clinical characteristics and diagnosis]. / Tuberculosis e infección por el virus de la inmunodeficiencia humana. Presentación clínica y diagnóstico.

OBJECTIVE: To analyze the clinical characteristics and diagnose of tuberculosis in patients infected by human immunodeficiency virus in our setting. METHODS: We have revised the clinical, microbiological and histological characteristics of 92 cases diagnosed tuberculosis in seropositive patients, during a span time of 128 months. RESULTS: Of them, 71 were male and most of them (81.5%) were intravenous drugs users. The most (93.4%) were sintomatic when tuberculosis was diagnosed mainly fever and general and respiratory sintomatology. The most common signs were the presence of lymphadenopathies and hepatomegaly. The tuberculosis affected mainly pulmonary and ganglionary system. 34 cases had only pulmonary pathology, 24 extrapulmonary, 25 pulmonary and extrapulmonary and 9 miliary. The tuberculosis diagnose was based in microbiologic criteris. The most frequent source, as histologic critery, has been the ganglionary tissue. CONCLUSIONS: The only or associated pulmonary forms are more frequent. The most commonly extrapulmonary form is the ganglionary localization. The most of diagnose methods were obtained from respiratory tract and lymphadenopathy samples.

[Association of sarcoidosis, diffuse centroblastic-centrocytic lymphoma and IgM monoclonal gammapathy in the same female patient]. / Asociación de sarcoidosis, linfoma centroblástico-centrocítico difuso y gammapatía monoclonal IgM en una misma paciente.

A case illustrating the infrequent association of sarcoidosis and lymphoma which was also a secretor of a monoclonal IgM paraprotein is described in a 68 year old woman. The first entity manifested by dyspnea corresponded with a bilateral interstitial pneumopathy with restrictive syndrome and was diagnosed by bronchoalveolar lavage and transbronchial biopsy and biopsy prescalenic fat. The lymphoma presented three years later followed by lymphadenopathies and a monoclonal IgM peak being diagnosed by biopsy of an axillary lymph node. In order to relate both entities it has been suggested that prolonged stimulation of the lymphocytes peculiar to the sarcoidosis would cause its malignant transformation.

[Plasmacytoma of the thyroid. A review apropos a case]. / Plasmacitoma de la glándula tiroides. Revisión a propósito de un caso.

Isolated presentation of outer bone marrow plasmatic cell neoplasia are non-frequent (less than 10% of all plasmacytomas). Thyroid gland involvement is rarely described. A case where immunohistochemistry confirmed the monoclonal type of proliferative cell is presented. Clinical, pathological and diagnosis criteria, as well as response to treatment, are reviewed.