ABSTRACT
Primary amelanotic mucosal melanoma is a rare entity with challenging histopathological features. Because these tumors are thought to be biologically more aggressive, they have a poorer prognosis than that of pigmented melanomas. In this work, we present a literature review about the clinical, histopathological, and immunohistochemical features of primary amelanotic mucosal melanoma of the oronasal region and report two new cases. Amelanotic mucosal melanoma commonly affects men in the seventh decade of life and tend to have a poor prognosis, as seen by the high incidence of metastasis, recurrences, and, ultimately, death. There is a similar pattern in the clinic-pathological predilections (such as age, gender, primary site, and metastatic potential) of amelanotic mucosal melanoma when comparing with data reported for pigmented lesions. This work reinforces knowledge about amelanotic mucosal melanomas and epidemiologic predilections. The optimal management of this lesion remains controversial.
Subject(s)
Melanoma, Amelanotic , Mouth Neoplasms , Adult , Aged, 80 and over , Female , Humans , Male , Melanoma, Amelanotic/diagnosis , Melanoma, Amelanotic/pathology , Melanoma, Amelanotic/physiopathology , Middle Aged , Mouth Neoplasms/diagnosis , Mouth Neoplasms/pathology , Mouth Neoplasms/physiopathologyABSTRACT
There is an urgent need for biomarkers to identify malignant thyroid nodules from indeterminate follicular lesions. We have used a subtractive proteomic strategy to identify novel biomarkers by selecting ligands to goiter tissue from a 12-mer random peptide phage-displayed library using the BRASIL method (Biopanning and Rapid Analysis of Selective Interactive Ligands). After three rounds of selection, two highly reactive clones to the papillary thyroid tumor cell line NPA were further evaluated, and their specific binding to tumor proteins was confirmed using phage-ELISA. The antibody-like peptide CaT12 was tumor-specific, which was further tested by immunohistochemistry against TMAs (tissue microarrays) comprised of 775 human benign and malignant tissues, including 232 thyroid nodular lesions: 15 normal thyroid tissues, 53 nodular goiters (NG), 54 follicular adenomas (FA); 69 papillary thyroid carcinomas (PTC); and 41 follicular carcinomas (FC). CaT12 was able to identify PTC among thyroid nodular lesions with 91.2% sensitivity and 85.1% specificity, despite its non-specificity for thyroid tissues. Additionally, the CaT12 peptide helped characterize follicular lesions distinguishing the follicular variant of PTC (FVPTC) from FA with 91.9% accuracy; FVPTC from NG with 83.1% accuracy; FVPTC from the classic PTC with 57.7% accuracy; and FVPTC from FC with 88.7% accuracy. In conclusion, our strategy to select differentially expressed ligands to thyroid tissue was highly effective and resulted in a useful antibody-like biomarker that recognizes malignancy among thyroid nodules and may help distinguish follicular patterned lesions.
Subject(s)
Adenocarcinoma, Follicular/diagnosis , Carcinoma/diagnosis , Peptides/metabolism , Thyroid Neoplasms/diagnosis , Thyroid Nodule/diagnosis , Adenocarcinoma, Follicular/metabolism , Amino Acid Sequence , Antibodies/metabolism , Base Sequence , Biomarkers, Tumor , Breast Neoplasms/metabolism , Carcinoma/metabolism , Carcinoma, Papillary , Cell Line, Tumor , Female , Goiter, Nodular/metabolism , Humans , Kidney Neoplasms/metabolism , Ligands , Male , Prostatic Neoplasms/metabolism , Protein Binding , Sequence Analysis, DNA , Thyroid Cancer, Papillary , Thyroid Gland/metabolism , Thyroid Neoplasms/metabolism , Thyroid Nodule/metabolism , Tissue Array AnalysisABSTRACT
Introdução: Câncer de boca é um termo utilizado para designar o grupo de neoplasias malignas incidentes nos tecidos bucais. É um importante problema de saúde pública em várias partes do mundo, situando-se entre os dez mais comuns tipos de cânceres humanos. Estudos epidemiológicos revelam que ainda persiste um perfil de diagnóstico tardio para a doença, fato que desfavorece marcadamente o prognóstico. Nesse sentido, é fundamental que todos os esforços sejam concentrados na mudança desse perfil de diagnóstico, a fim de favorecer diagnósticos mais precoces. Objetivo: Avaliar o perfil de diagnóstico do câncer bucal na Faculdade de Odontologia da Universidade Federal de Uberlândia, após a implantação do Programa de Cuidados Específicos a Doenças Estomatológicas. Método: Casos de carcinomas epidermóides bucal diagnosticados em períodos anteriores (1993-1997) e posteriores (1999-2004 e 2008-2010) à instalação do referido programa foram analisados quanto aos dados sociodemográficos dos pacientes e clinicopatológicos das lesões, considerando, principalmente, o estadiamento da doença. Resultado: O perfil dos diagnósticos do câncer manteve-se inalterado, independentemente do período estudado. Houve um predomínio de lesões entre 2 e 4 cm, sendo que, no último período (2008-2010), prevaleceu o diagnóstico de lesões maiores do que 4 cm (p = 0,0132). Além disto, o diagnóstico predominante incluiu lesões em estágios avançados, ressalvando-se que, no período imediato à instalação do programa, houve um predomínio significativo de lesões em estágio precoce (p < 0,0001). Conclusão: Esses resultados mostraram que não houve uma significativa modificação do perfil do diagnóstico após a implantação do Programa de Cuidados Específicos a Doenças Estomatológicas.
Background: Oral cancer is a term used to designate the group of malignancies incidents in oral tissue. It is a major public health problem in many parts of the world, standing among the ten most common types of human cancers. Epidemiological studies show that there is still a pattern of late diagnosis for the disease. In this sense, it is essential that all efforts are concentrated on changing this pattern of diagnosis, in order to facilitate early diagnosis. Objective: To evaluate the diagnostic profile of oral cancer in the Faculty of Dentistry, Federal University of Uberlandia, after the implantation of Care Program Specific Diseases in Stomatology. Method: For both cases of oral squamous cell carcinoma diagnosed in the periods before (1993-1997) and after (1999-2004 and 2008-2010) the installation of this program were analyzed for patients? sociodemographic data and clinical-pathological lesions, considering especially the staging of the disease. Result: Our results showed that, overall, the profile of cancer diagnoses remained unchanged, regardless of the period studied. There was a predominance of lesions between 2 and 4 cm, and in the last period (2008-2010), the prevailing diagnosis of lesions larger than 4 cm (p = 0.0132). Furthermore, the predominant diagnosis included lesions in advanced stages, stressing that, in the immediate installation of the program, there was a significant predominance of lesions at an early stage (p < 0.0001). Conclusion: These results showed no significant change in the profile of the diagnosis after the implementation of care program for specific diseases in stomatology.
Subject(s)
Prognosis , Mouth Neoplasms , Carcinoma, Squamous Cell , Medical Records , Diagnosis , Delayed Diagnosis , Public Health , Statistics, NonparametricABSTRACT
A osteíte fibrosa cística é uma apresentação avançada do hiperparatireoidismo e pode acometer, mais raramente, a coluna vertebral. No presente relato, a paciente evoluiu de um quadro de dor localizada para paraplegia por compressão medular. Destaca-se a importância de investigação e abordagem precoces dessa condição, a fim de evitar complicações irreversíveis.
Osteitis fibrosa cystica is an advanced consequence of hiperparathyroidism and, eventually, it is situated in spine. In this report, the patient showed a localized pain which quickly evaluated to paraplegia caused by spinal cord compression. Early investigation and intervention in this clinical condition are important in order to prevent irreversible complications.
ABSTRACT
Bilateral salivary gland tumors are very rare, accounting for 3% of all parotid gland tumors. Although the most common tumor with bilateral development is the Warthin tumor, pleomorphic adenomas (PA) have been diagnosed simultaneously as well, but in a smaller incidence. Because of this, the prevalence, etiology, pathogenesis, and behavior of the PA in this context are poorly understood. We present a case of bilateral metachronous PA affecting the parotid gland in a 63-year-old woman. Clinically, the lesions presented with similar aspects as seen in cases of solitary PA with slow-growing asymptomatic nodule. Both lesions were diagnosed by fine-needle aspiration biopsy at an interval of 2 years between them. A total and superficial parotidectomy for left and right tumors, respectively, was performed. Only on the left side some facial nerve branches were removed that induced partial paralysis in the patient. A review of the pertinent literature is included.
