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External auditory canal microbiome

ABSTRACT: Microbiome of the healthy external auditory canal

PROVIDER: PRJEB34644 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR3577130_1.fastq.gz	Fastqsanger.gz
	ERR3577130_2.fastq.gz	Fastqsanger.gz
	ERR3577140_1.fastq.gz	Fastqsanger.gz
	ERR3577140_2.fastq.gz	Fastqsanger.gz
	ERR3577150_1.fastq.gz	Fastqsanger.gz

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Project description:External auditory canal squamous cell carcinoma (EACC) is very rare, only accounting for two thousandth of the head and neck cancer. However, the development mechanism of EACC remains unknown. By using gene expression microarray analysis, we aimed to find differentially expressed genes involved in ESCC development. We identified a wide spectrum of molecular signatures in EACC, including mRNA and lncRNA. The present study systematically analyzed the expression of mRNA and lncRNA in squamous cell carcinoma of the external auditory canal and normal external auditory canal tissues. We detect the transcriptomic changes between squamous cell carcinoma of the external auditory canal and normal external auditory canal tissues to identify potential tumor biomarkers in squamous cell carcinoma of the external auditory canal.

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Project description:IntroductionHidradenoma papilliferum, also known as papillary hidradenoma, is a rare tumor of the sudoral glands, that occurs almost exclusively in women, on the vulvar and perineal region. Non-genital papillary hydradenoma is an even more rare occurrence, though some cases have been described in literature.This is a report of a 56 years old patient who presented with unilateral hearing loss secondary to a mass of the external auditory canal (EAC). A biopsy allowed us to make the diagnosis of a papillary hidradenoma of the EAC. The treatment was based on surgery; the tumor was removed while respecting the adjacent structures. Follow-up of the patient shows no actual recurrence.ConclusionEctopic Hidradenoma papilliferum located in the EAC is a rare occurrence, and should be considered as a possible diagnosis when investigating a mass of the EAC.

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Genetic landscape of external auditory canal squamous cell carcinoma.

Project description:External auditory canal squamous cell carcinoma (EACSCC) is an extremely rare and aggressive malignancy. Due to its rarity, the molecular and genetic characteristics of EACSCC have not yet been elucidated. To reveal the genetic alterations of EACSCC, we performed whole exome sequencing (WES) on 11 primary tumors, 1 relapsed tumor and 10 noncancerous tissues from 10 patients with EACSCC, including 1 with a rare case of synchronous bilateral EACSCC of both ears. WES of the primary tumor samples showed that the most frequently mutated gene is TP53 (63.6%). In addition, recurrent mutations in CDKN2A, NOTCH1, NOTCH2, FAT1 and FAT3 were detected in multiple samples. The mutational signature analysis of primary tumors indicated that the mutational processes associated with the activation of apolipoprotein B mRNA-editing enzyme catalytic polypeptide-like (APOBEC) deaminases are the most common in EACSCC, suggesting its similarity to SCC from other primary sites. Analysis of arm-level copy number alterations detected notable amplification of chromosomes 3q, 5p and 8q as well as deletion of 3p across multiple samples. Focal chromosomal aberrations included amplifications of 5p15.33 (ZDHHC11B) and 7p14.1 (TARP) as well as deletion of 9p21.3 (CDKN2A/B). The protein expression levels of ZDHHC11B and TARP in EACSCC tissues were validated by immunohistochemistry. Moreover, WES of the primary and relapsed tumors from a case of synchronous bilateral EACSCC showed the intrapatient genetic heterogeneity of EACSCC. In summary, this study provides the first evidence for genetic alterations of EACSCC. Our findings suggest that EACSCC mostly resembles other SCC.

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