Displaying publications 21 - 40 of 99 in total

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  1. Invasive squamous cell carcinoma arising from chromoblastomycosis
    Jamil A, Lee YY, Thevarajah S
    Med Mycol, 2012 Jan;50(1):99-102.
    PMID: 21449695 DOI: 10.3109/13693786.2011.571295
    Chromoblastomycosis is a chronic subcutaneous mycosis seen mainly in tropical regions. While malignant transformation rarely occurs, the present report describes a 69-year-old man with a 21-year history of chromoblastomycosis complicated by invasive squamous cell carcinoma requiring amputation of the affected limb. A review of previous reported cases shows malignancy arising after 20-30 years of infection in ≥60-year-old males who have received inadequate treatment of chromoblastomycosis and have had relapses. An immunocompromised state is not an associated feature of such cases. The extremities are commonly affected as carcinomas occur from the most chronic lesions which are generally found on these limbs.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology*
  2. Unusual form of superficial spreading microinvasive squamous cell carcinoma of uterine cervix involving the endometrium of uterus
    Tan GC, Isa MR, Ng SP, Jamil YM
    J Obstet Gynaecol Res, 2004 Oct;30(5):363-7.
    PMID: 15327449
    Microinvasive squamous cell carcinoma of the uterine cervix is a recognized entity and is defined as carcinoma with invasion of less than 5 mm penetration of the stroma and seldom metastasized. Our patient was a 70-year-old, multiparous woman who had a microinvasive, cervical, squamous cell carcinoma. The tumor had spread superficially into the entire endometrial cavity up to the fundus, totally replacing the columnar epithelium. This is an extremely rare phenomenon, with fewer than 20 cases reported so far in the literature.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  3. Immortalization of epithelial cells in oral carcinogenesis as revealed by genome-wide array comparative genomic hybridization: A meta-analysis
    Vincent-Chong VK, Salahshourifar I, Razali R, Anwar A, Zain RB
    Head Neck, 2016 04;38 Suppl 1:E783-97.
    PMID: 25914319 DOI: 10.1002/hed.24102
    BACKGROUND: This purpose of this meta-analysis study was to identify the most frequent and potentially significant copy number alteration (CNA) in oral carcinogenesis.

    METHODS: Seven oral squamous cell carcinoma (OSCC)-related publications, corresponding to 312 samples, were identified for this meta-analysis. The data were analyzed in a 4-step process that included the genome assembly coordination of multiple platforms, assignment of chromosomal position anchors, calling gains and losses, and functional annotation analysis.

    RESULTS: Gains were more frequent than losses in the entire dataset. High-frequency gains were identified in chromosomes 5p, 14q, 11q, 7p, 17q, 20q, 8q, and 3q, whereas high-frequency losses were identified in chromosomes 3p, 8p, 6p, 18q, and 4q. Ingenuity pathway analysis showed that the top biological function was associated with immortalization of the epithelial cells (p = 1.93E-04).

    CONCLUSION: This study has identified multiple recurrent CNAs that are involved in various biological annotations associated with oral carcinogenesis. © 2015 Wiley Periodicals, Inc. Head Neck 38: E783-E797, 2016.

    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  4. Rapid developing basaloid squamous cell carcinoma of the uterine cervix in a young adult Taiwanese
    Tsai HJ, Liou B, Li MC
    Malays J Pathol, 2013 Dec;35(2):177-80.
    PMID: 24362481
    Basaloid squamous cell carcinoma (BSCC) of the uterine cervix is a rare malignancy of the female genital tract with a poorer clinical outcome than SCC of the uterine cervix. We report a case of BSCC of the uterine cervix developing rapidly in a young adult Taiwanese. A 35-year-old woman, Para 2, visited the emergency room with severe dizziness, palpitations and sudden excessive vaginal bleeding with hemoglobin of 3.6 g/dl. She had been well and healthy but intermittent vaginal spotting developed for around 6 months previously and was treated as abnormal uterine bleeding by ob-gyn practitioners. She had a repeat cesarean operation 16 months prior to this episode and the last Pap smear showed reactive change 12 months ago at our hospital. On examination, she had an ulcerated, necrotic, and punched-out lesion of 5 cm of the cervix. A cervical biopsy revealed poorly differentiated typical BSCC. Abdominal/pelvic computerized tomography and whole body positron emission tomography confirmed FIGO staging IB2. She responded well to concurrent chemoradiotherapy. Follow-up for the patient is ongoing. This is a rapid developing BSCC of the uterine cervix, although we cannot actually ascertain when it started and how rapidly it progressed.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology*
  5. Dysregulation of miR-31 and miR-375 expression is associated with clinical outcomes in oral carcinoma
    Siow MY, Ng LP, Vincent-Chong VK, Jamaludin M, Abraham MT, Abdul Rahman ZA, et al.
    Oral Dis, 2014 May;20(4):345-51.
    PMID: 23651447 DOI: 10.1111/odi.12118
    To identify differentially expressed miRNA between oral squamous cell carcinoma (OSCC) and non-cancer (NC) and to associate these with clinico-pathological parameters.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  6. Fulltext Performance analysis of Leica Biosystems p16 monoclonal antibody in oropharyngeal squamous cell carcinoma
    Thavaraj S, Robinson M, Dayal S, Bowen C
    Diagn Pathol, 2025 Jan 24;20(1):9.
    PMID: 39856694 DOI: 10.1186/s13000-025-01601-w
    BACKGROUND: Head and neck squamous cell carcinoma (HNSCC) is the sixth leading cause of cancer death globally, with newly diagnosed oropharyngeal squamous cell carcinoma (OPSCC) cases rising to 54,000 in the US alone in the year 2022. Recently, human papilloma virus (HPV) infection was more prevalent in OPSCC patients than the traditionally known carcinogens such as tobacco or alcohol. HPV 16 is the most common causative HPV strain, which is found in 5-10% of HNSCC patients. HPV 16's E6 and E7 oncoproteins bind and inactivate p53 and retinoblastoma (Rb) tumor-suppressing genes. This causes aberrant over-expression of the cell cycle inhibitor gene, p16, leading to tumorigenesis. Leica Biosystems (LBS) has developed a p16 antibody (6H12 clone) for qualitatively identifying the p16 protein in formalin-fixed paraffin-embedded (FFPE) tissue by immunohistochemical staining. This method comparison study tested the concordance rates between ready-to-use (RTU) LBS p16/LBS RTU p16 antibody and Roche Tissue Diagnostics (RTD) CINtec p16 Histology immunohistochemical (IHC) assays by measuring overall agreement (OA), average positive agreement (APA), and average negative agreement (ANA) rates in 170 OPSCC FFPE cases. Interobserver agreement of the 2 assays and LBS RTU p16 comparison with the standard HPV molecular assays (DNA ISH and PCR) were also assessed.

    METHODS: One hundred and seventy (170) unique oropharyngeal cancer cases were stained for qualitative analysis by the LBS p16 antibody on BOND III. This assay was compared to Ventana's RTD E6H4 (CINtec) clone on Benchmark XT. A stained core was considered p16 positive if the Histoscore (H score) was ≥ 140 and negative if H 

    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  7. Clinicopathological features of squamous cell carcinoma of the oral cavity and oropharynx in young patients
    Martinez RC, Sathasivam HP, Cosway B, Paleri V, Fellows S, Adams J, et al.
    Br J Oral Maxillofac Surg, 2018 May;56(4):332-337.
    PMID: 29628167 DOI: 10.1016/j.bjoms.2018.03.011
    Our aim was to examine the clinicopathological features of squamous cell carcinoma (SCC) of the oral cavity and oropharynx in a group of young patients who were dignosed during a 15-year period (2000-2014). Patients' clinical details, risk factors, and survival were obtained from medical records. Formalin-fixed, paraffin-embedded, tissue was tested for high-risk human papillomavirus (HPV). The results were compared with those of a matching group of older patients. We identified 91 patients who were younger than 45 years old, and the 50 youngest patients were studied in detail. The male:female ratio was 2:1, with more tumours located in the oral cavity than in the oropharynx (35 compared with 15). HPV-related SCC was restricted to the oropharynx. When matched for site, stage and HPV status, five-year overall survival was similar in young and matched older patients (log-rank test, p=0.515). Our findings suggest that young patients with oral SCC have a disease profile similar to that of older patients with the condition. It is plausible that prognostic information generally available for oral cancers is applicable to young patients with the disease.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology*
  8. Effects of Damnacanthal and Nordamnacanthal on Proliferation, Apoptosis, and Migration of Oral Squamous Cell Carcinoma Cells
    Shaghayegh G, Alabsi AM, Ali-Saeed R, Ali AM, Vincent-Chong VK, Ismail NH, et al.
    Asian Pac J Cancer Prev, 2017 Dec 29;18(12):3333-3341.
    PMID: 29286228
    Cancer is one of the most common causes of death in the developed world, with one-third of people diagnosed with
    cancer during their lifetime. Oral cancer commonly occurs involving the buccal mucosa (cheeks), tongue, floor of the
    mouth and lip. It is one of the most devastating and disfiguring of malignancies. Morinda citrifolia L., commonly known
    as ‘noni’, belongs to the Rubiaceae family. It is native to the Pacific islands, Hawaii, Caribbean, Asia and Australia.
    The plant displays broad curative effects in pharmacological studies. Damnacanthal (DAM) and Nordamnacanthal
    (NDAM), anthraquinone compounds isolated from the roots of Morinda citrifolia L., has been used for the treatment
    of several chronic diseases including cancer. The objectives of this study were to evaluate cytotoxicity, morphological
    changes, cell death mode (apoptosis/necrosis), and cell migration induced by DAM and NDAM on the most common
    type of oral cancer, oral squamous cell carcinoma (OSCC)cells. Anti-proliferative effects of these compounds against
    OSCC cell lines were determined by MTT assay. The mode of cell death was analysed by phase contrast and fluorescent
    microscopy as well as flow cytometry. In addition, cell migration was assessed. The results showed that DAM and
    NDAM exerted cytotoxicity against OSCC cells with IC50 values of 1.9 to >30 μg/ml after 72 h treatment. Maximum
    growth inhibition among the tested cell lines for both compounds was observed in H400 cells, and thus it was selected
    for further study. The study demonstrated inhibition of H400 OSCC cell proliferation, marked apoptotic morphological
    changes, induction of early apoptosis, and inhibition of cell migration by DAM and NDAM. Therefore, this information
    suggests that these compounds from noni have potential for used as anti tumor agents for oral cancer therapy.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology*
  9. ADAM9 Expression in Uterine Cervical Cancer and Its Associated Factors
    Mohd Isa SA, Md Salleh MS, Ismail MP, Hairon SM
    Asian Pac J Cancer Prev, 2019 Apr 29;20(4):1081-1087.
    PMID: 31030477
    Background: Cervical cancer is a preventable disease caused by human papillomaviruses. It is the third most
    common cancer to occur in women of reproductive age. The ADAM9 protein plays a role in basement membrane
    degradation and tumour metastasis in certain types of tumour. Thus, it has the potential to become a new targeted
    therapy. The objective of this study was to investigate ADAM9 expression in cervical cancer and to determine the
    factors associated with ADAM9-positive expression. Methods: This cross-sectional study was conducted in Hospital
    Universiti Sains Malaysia (HUSM) Kelantan, Malaysia from December 2010 to December 2012. Histological slides
    obtained from 95 cervical cancer cases diagnosed and/or treated in HUSM from 2000 to 2010 were analysed. The
    ADAM9 immunostain was then performed on the paraffin blocks. The statistical data entry and analysis were done
    using SPSS version 18.0. Multiple logistic regression analysis was performed to determine the factors associated with
    ADAM9-positive expression. Result: Of the 95 cervical cancer patients included in the study, 72 (75.8%) patients showed
    positive ADAM9 expression. The mean age of the patients was 53.89 (10.83) years old. Squamous cell carcinoma was
    the most common type of cervical cancer (n = 67, 70.5%). Factors that showed a statistically significant association
    with ADAM9-positive expression were tumour size (adjusted odds ratio [adj. OR]: 1.08; 95% confidence interval
    [CI]: 1.02, 1.13; p = 0.004), distant metastasis (adj. OR: 12.82; 95% CI: 1.91, 86.13; p = 0.009) and the histological
    type of cervical cancer (i.e. squamous cell carcinoma) (adj. OR: 7.39; 95% CI: 1.42, 38.51; p = 0.017). Conclusion:
    The ADAM9 immunostain was consistently positive in malignant cells. Thus, ADAM9 expression can be used as a
    prognostic/therapeutic indicator in aiding clinician decision-making regarding patient treatment (targeted therapy).
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology*
  10. Translational genomics and recent advances in oral squamous cell carcinoma
    Chai AWY, Lim KP, Cheong SC
    Semin Cancer Biol, 2020 04;61:71-83.
    PMID: 31542510 DOI: 10.1016/j.semcancer.2019.09.011
    Oral squamous cell carcinomas (OSCC) are a heterogeneous group of cancers arising from the mucosal lining of the oral cavity. A majority of these cancers are associated with lifestyle risk habits including smoking, excessive alcohol consumption and betel quid chewing. Cetuximab, targeting the epidermal growth factor receptor was approved for the treatment of OSCC in 2006, and remains the only molecular targeted therapy available for OSCC. Here, we reviewed the current findings from genomic analyses of OSCC and discuss how these studies inform on the biological mechanisms underlying OSCC. Exome sequencing revealed that the significantly mutated genes are mainly tumour suppressors. Mutations in FAT1, CASP8, CDKN2A, and NOTCH1 are more frequently found in OSCC when compared to non-OSCC head and neck cancers and other squamous cell carcinomas, and HRAS and PIK3CA are the only significantly mutated oncogenes. The distribution of these mutations also differs in populations with distinct risk habits. Gene expression-based molecular classification showed that OSCC can be divided into distinct subtypes and these have a preferential response to different types of therapies, suggesting that these classifications could have clinical implications. More recently, with the approval of checkpoint inhibitors for the treatment of cancers including OSCC, genomics studies also dissected the genetic signatures of the immune compartment to delineate immune-active and -exhausted subtypes that could inform on the immune status of OSCC patients and guide the development of novel therapies to improve response to immunotherapy. Taken together, genomics studies are informing on the biology of both the epithelial and stromal compartments underlying OSCC development, and we discuss the opportunities and challenges in using these to derive clinical benefit for OSCC patients.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  11. Fulltext Pathological transition as the arising mechanism for drug resistance in lung cancer
    Chen Y, Tang WY, Tong X, Ji H
    Cancer Commun (Lond), 2019 10 01;39(1):53.
    PMID: 31570104 DOI: 10.1186/s40880-019-0402-8
    Despite the tremendous efforts for improving therapeutics of lung cancer patients, its prognosis remains disappointing. This can be largely attributed to the lack of comprehensive understanding of drug resistance leading to insufficient development of effective therapeutics in clinic. Based on the current progresses of lung cancer research, we classify drug resistance mechanisms into three different levels: molecular, cellular and pathological level. All these three levels have significantly contributed to the acquisition and evolution of drug resistance in clinic. Our understanding on drug resistance mechanisms has begun to change the way of clinical practice and improve patient prognosis. In this review, we focus on discussing the pathological changes linking to drug resistance as this has been largely overlooked in the past decades.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  12. Metastatic lung cancer in pregnancy
    Wong CM, Lim KH, Liam CK
    Respirology, 2003 Mar;8(1):107-9.
    PMID: 12856752
    Pregnancy complicated by lung cancer has been rarely reported. The regional incidence of this complex situation is likely to increase in the future and optimal management needs to be established to better deal with this situation. We report two patients with metastatic lung cancer complicating pregnancy to highlight the evaluation and management difficulties associated with this problem and to contribute to the limited information in the literature.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology*
  13. Fulltext Biology and pathological associations of the human papillomaviruses: a review
    Cheah PL, Looi LM
    Malays J Pathol, 1998 Jun;20(1):1-10.
    PMID: 10879257
    Historical cottontail rabbit papillomavirus studies raised early indications of a mammalian DNA oncogenic virus. Today, molecular cloning recognises numerous animal and human papillomaviruses (HPVs) and the development of in vitro transformation assays has escalated oncological research in HPVs. Currently, their detection and typing in tissues is usually by Southern blotting, in-situ hybridization and polymerase chain reaction methods. The complete papillomavirus virion constitutes a protein coat (capsid) surrounding a circular, double-stranded DNA organised into coding and non-coding regions. 8 early (E1-E8) open reading frames (ORFs) and 2 late (L1, L2) ORFs have been identified in the coding region of all papillomaviruses. The early ORFs encode proteins which interact with the host genome to produce new viral DNA while late ORFs are activated only after viral DNA replication and encode for viral capsid proteins. All papillomaviruses are obligatory intranuclear organisms with specific tropism for keratinocytes. Three possible courses of events can follow papillomaviruses entry into cells: (1) viral DNA are maintained as intranuclear, extrachromosomal, circular DNA episomes, which replicates synchronously with the host cell, establishing a latent infection; (2) conversion from latent into productive infection with assembly of complete infective virions; (3) integration of viral DNA into host cellular genome, a phenomenon seen in HPV infections associated with malignant transformation. Human papillomaviruses (HPVs) essentially induce skin and mucosal epithelial lesions. Various skin warts are well known to be HPV-associated (HPVs 1, 2, 3, 7 and 10). Besides HPVs 3 and 10, HPVs 5, 8, 17 and 20 have been recovered from Epidermodysplasia verruciformis lesions. Anogenital condyloma acuminatum, strongly linked with HPVs 6 and 11 are probably sexually transmitted. The same HPVs, demonstrable in recurrent juvenile laryngeal papillomas, are probably transmitted by passage through an infected birth canal. HPVs described in uterine cervical lesions are generally categorized into those associated with high (16, 18), intermediate (31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 68) and low (6, 11, 26, 40, 42, 43, 44, 53, 54, 55, 62, 66) risk of cervical squamous carcinoma. Cervical adenocarcinoma, clear cell carcinoma and small cell neuroendocrine carcinoma have also been linked to HPVs, especially HPV18. Other lesions reported to be HPV-associated are: papillomas, dysplasia and carcinomas in the nasal cavity (HPV 6, 11, 57); squamous papilloma, condyloma acuminatum, and verruca vulgaris of the oral cavity (HPV 6, 11), oral focal epithelial hyperplasia (HPV 13, 32); warty lip lesions (HPV 2): and conjunctival papillomas (HPV 6, 11).
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  14. Fulltext A 5-year review of FIGO stage IB cervical cancer in an Asian population
    Tay EH, Yeap ML, Ho TH
    Singapore Med J, 1997 Dec;38(12):520-4.
    PMID: 9550918
    We studied the clinical patterns and outcome of patients with FIGO (1985) Stage 1b cervical cancer. In particular, looking at the clinico-pathological characteristics in relation with disease recurrence.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  15. Malignancy in oral lichen planus: a review of a group from the Malaysian population
    Yaacob HB, Tan PL, Ngeow WC
    J Oral Sci, 2002 Jun;44(2):65-71.
    PMID: 12227497
    The objective of this study was to determine the socio-demography (age, race and gender) of a group of Malaysian patients who were diagnosed as suffering from oral lichen planus (OLP). The occurrence of malignancy was also investigated. A total of 77 clinical and biopsy records of patients with OLP were studied. Females were affected more than males, with the female to male ratio being 2:1. Middle-aged Indian and Chinese females tend to be affected by OLP when compared with the rest of the population. Only 19 patients returned for further follow-up. One adult Indian female with a six-year history of lichenoid reaction showed the presence of malignancy.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  16. Fulltext Incidence of nasopharyngeal carcinoma in Malaysia, with special reference to the state of Selangor
    Armstrong RW, Kutty MK, Dharmalingam SK
    Br. J. Cancer, 1974 Jul;30(1):86-94.
    PMID: 4413823
    A "registry" of all known cases of nasopharyngeal carcinoma in Malaysia, 1968-72, was established. Attention was focused on the State of Selangor where conditions are best for case finding. Age-adjusted incidence rates among Chinese males and females were 17·3 and 7·3 per 100,000; among Malay males and females, the rates were 2·5 and 0·3 and among Indian males, 1·1. The detailed ethnicity of 192 cases in Selangor was established. Estimated incidence rates for the Chinese sub-groups agreed with the pattern observed elsewhere: highest among the Cantonese, lowest among the Hokkien/Teochiu, with the Khek in between. There was no correlation between histological type and sub-ethnic group among the Chinese cases.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  17. Recent trends in histological pattern of cervical carcinoma among three ethnic groups in Malaysia
    Cheah PL, Looi LM, Sivanesaratnam V
    J Obstet Gynaecol Res, 1999 Dec;25(6):401-6.
    PMID: 10680337
    To study the trend of different histological types of cervical carcinoma among the 3 major ethnic groups in Malaysia.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  18. Proliferating cell nuclear antigen (PCNA) expression in oral squamous cell carcinoma - an aid to conventional histological grading?
    Zain RB, Sakamoto F, Shrestha P, Mori M
    Malays J Pathol, 1995 Jun;17(1):23-30.
    PMID: 8907001
    Proliferating cell nuclear antigen (PCNA) is a well known marker for cell proliferation. It tends to accumulate in the late G1 and S-phase of the cell cycle. A monoclonal antibody (MoAb) against PCNA is now available and it can react with paraffin-embedded specimens. In the present study, PCNA immunohistochemical staining of 36 cases of oral cancer specimens obtained from surgery were investigated. The results showed differing nuclear staining patterns for PCNA in normal, hyperplastic and dysplastic epithelium, early cancer and 3 levels of differentiation for squamous cell carcinoma of the oral cavity. It appears that PCNA can be a useful marker in delineating normal epithelium and hyperplastic epithelium from dysplasia in the oral cavity. The use of PCNA staining may further emphasize the conventional histopathological grading of well-differentiated, moderately-differentiated and poorly-differentiated oral squamous cell carcinoma but is still dependent on basic criteria as observed without immunostaining. PCNA expression for all grades of squamous cell carcinoma are present at the deep, infiltrative margins.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
  19. Over-expression of MAGED4B increases cell migration and growth in oral squamous cell carcinoma and is associated with poor disease outcome
    Chong CE, Lim KP, Gan CP, Marsh CA, Zain RB, Abraham MT, et al.
    Cancer Lett, 2012 Aug 1;321(1):18-26.
    PMID: 22459352 DOI: 10.1016/j.canlet.2012.03.025
    MAGE proteins have been shown to be good targets for cancer immunotherapy. We demonstrate that MAGED4B is over-expressed in more than 50% of Oral Squamous Cell Carcinoma (OSCC) tissues and the expression of MAGED4B is associated with lymph node metastasis and poor disease specific survival. OSCC cell lines that over-express MAGED4B promote migration in vitro, exhibit an increase in cell growth both in vitro and in vivo, and are more resistant to apoptosis compared to control cells. Our data suggest that MAGED4B over-expression is a driver in oral carcinogenesis and argues strongly that this protein may represent a potential therapeutic target in OSCC.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology*
  20. Fulltext Resection and reconstruction of malignant tumor involving sternum
    Faisham WI, Ziyadi MG, Azman WS, Halim AS, Zulmi W, Biswal BM
    Med J Malaysia, 2012 Apr;67(2):224-5.
    PMID: 22822652 MyJurnal
    We present a series of four cases of chest wall tumor, which underwent sternum resection. The methods of resection and reconstruction chest wall defect are discussed and the final outcome highlighted.
    Matched MeSH terms: Carcinoma, Squamous Cell/pathology
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