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This paper shows the experimental results obtained by applying the classifier parallel scheme of decision tables (ParalTabs) to detection of genes in individuals associated with laryngeal cancer1 This paper is an extended version of two conference paper that appeared in [1] and [2]. The key additions of this journal version are as follows. First, in Section 3 we use a different way of how to implement the ParalTabs algorithm, using a set of processes instead of threads. Second, in Section 4 we use the same transformation of data used in previous work [2], but the size of data in this paper is different. Finally, this paper contains new experimental results in Section 4, one of this is using ParalTabs for searching genetic Q3 Q2 markers of laryngeal cancer, which is different from those shown in the paper [2].. The experiments are performed by analyzing a chromosomal database of laryngeal cancer which has the International System for Human Cytogenetic Nomenclature format. ParalTabs is an implementation of decision tables classifiers using the parallel model of multiple instruction and multiple data streams. This classifier uses a set of process that communicates via messages passing and use a parallel scheme that follows the strategy of divide and conquers. We found ParalTabs a useful algorithm to perform classification on genetic databases, obtaining improvements in execution times and performance measures. Using this system, we can determine genes associated with proliferation or non-proliferation of laryngeal cancer, only by taking samples of individuals and analyzing their DNA. [ABSTRACT FROM AUTHOR]

Objective. We report an extremely rare case of ganglioneuroma involving the external auditory canal and middle ear. Case Report. Ganglioneuromas are rare benign mature tumors thought to originate from sympathetic ganglions, with the highest incidence in the retroperitoneum, adrenal medulla, and posterior mediastinum. We present a case of ganglioneuroma of the external auditory canal and middle ear. At the age of 12 months, the patient was diagnosed with neuroblastoma stage IV with metastasis to the squamous temporal bone, bone marrow, and skull base. He received a high-risk protocol regimen resulting in complete remission. The patient later presented with recurrent right ear discharge at the age of six years and was diagnosed with ganglioneuroma of external auditory canal and middle ear after appropriate investigations. We report in this article the clinical presentation, investigations, surgical intervention, and follow-up. Conclusion. After the literature review and to our knowledge, this is the first reported case of its kind. Ganglioneuroma maturing from neuroblastoma is one of the theories describing pathophysiology of the disease. Ganglioneuroma should be considered in the differential diagnosis of patients presenting with recurrent ear discharge and decreased hearing in treated cases of neuroblastoma with metastases to temporal bone. [ABSTRACT FROM AUTHOR]