Presence of HPV DNA in convalescent salivary rinses is an adverse prognostic marker in head and neck squamous cell carcinoma

Human papillomavirus (HPV) 16 is present in up to 60% of patients with head and neck squamous cell carcinoma (HNSCC) and confers a favorable prognosis in terms of recurrence and mortality. Previous reports demonstrated that HPV-16 DNA can be detected in the initial salivary rinses from these patients. In this study, we assessed the feasibility of post-treatment HPV DNA shed from the oral mucosa as a prognostic marker for persistent/recurrent head and neck cancer. Fresh tumor samples and pre- and post-treatment salivary rinses were collected from 59 patients with HNSCC. HPV-16 E6 and E7 DNA copy number in these samples were quantified by real time PCR. Twenty of 59 patients (33.9%) were HPV-16 positive in their tumors before treatment. Four of 20 HPV tumor positive patients ultimately developed recurrence, and two of these four patients were HPV-16 positive in surveillance salivary rinses (sensitivity=50%). Of the 39 (66.1%) HPV-16 negative patients on initial clinical presentation and the 16 HPV-16 positive patients who did not recur, none were HPV-16 positive in salivary rinses after treatment (specificity=100%). HPV-16 presence in follow-up salivary rinses preceded clinical detection of disease recurrence by an average of 3.5 months. Patients with presence of HPV-16 DNA in surveillance salivary rinses are at significant risk for recurrence. Quantitative measurement of salivary HPV-16 DNA has promise for surveillance and early detection of recurrence.

The role of infectious agents in the etiology of ocular adnexal neoplasia

Given the fact that infectious agents contribute to around 18% of human cancers worldwide, it would seem prudent to explore their role in neoplasms of the ocular adnexa: primary malignancies of the conjunctiva, lacrimal glands, eyelids, and orbit. By elucidating the mechanisms by which infectious agents contribute to oncogenesis, the management, treatment, and prevention of these neoplasms may one day parallel what is already in place for cancers such as cervical cancer, hepatocellular carcinoma, gastric mucosa-associated lymphoid tissue lymphoma and gastric adenocarcinoma. Antibiotic treatment and vaccines against infectious agents may herald a future with a curtailed role for traditional therapies of surgery, radiation, and chemotherapy. Unlike other malignancies for which large epidemiological studies are available, analyzing ocular adnexal neoplasms is challenging as they are relatively rare. Additionally, putative infectious agents seemingly display an immense geographic variation that has led to much debate regarding the relative importance of one organism versus another. This review discusses the pathogenetic role of several microorganisms in different ocular adnexal malignancies, including human papilloma virus in conjunctival papilloma and squamous cell carcinoma, human immunodeficiency virus in conjunctival squamous carcinoma, Kaposi sarcoma-associated herpes virus or human herpes simplex virus-8 (KSHV/HHV-8) in conjunctival Kaposi sarcoma, Helicobacter pylori (H. pylori,), Chlamydia, and hepatitis C virus in ocular adnexal mucosa-associated lymphoid tissue lymphomas. Unlike cervical cancer where a single infectious agent, human papilloma virus, is found in greater than 99% of lesions, multiple organisms may play a role in the etiology of certain ocular adnexal neoplasms by acting through similar mechanisms of oncogenesis, including chronic antigenic stimulation and the action of infectious oncogenes. However, similar to other human malignancies, ultimately the role of infectious agents in ocular adnexal neoplasms is most likely as a cofactor to genetic and environmental risk factors.

Association between human papillomavirus (HPV) and oesophageal squamous cell carcinoma: a meta-analysis

The oncogenic potential of human papillomaviruses (HPV) is well known in the context of cervical carcinoma; however, their role in the development of oesophageal squamous cell carcinoma (OSCC) is less clear. We aimed to determine the extent of the association between HPV infection and OSCC. A comprehensive literature search found 132 studies addressing HPV and OSCC in human cases, and a meta-analysis was performed using a random-effects model. There was evidence of an increased risk of OSCC in patients with HPV infection [odds ratio (OR) 2·69, 95% confidence interval (CI) 2·05-3·54]. The prevalence of HPV in OSCC was found to be 24·8%. There was an increased risk associated with HPV-16 infection (OR 2·35, 95% CI 1·73-3·19). Subgroup analyses showed geographical variance, with Asia (OR 2·94, 95% CI 2·16-4·00), and particularly China (OR 2·85, 95% CI 2·05-3·96) being high-risk areas. Our results confirm an increase in HPV infection in OSCC cases.

Quantitative screening of single copies of human papilloma viral DNA without amplification

We describe a novel quantitative viral screening method based on single-molecule detection that does not require amplification. DNA of human papilloma virus (HPV), the major etiological agent of cervical cancer, served as the screening target in this study. Eight 100-nucleotide single-stranded DNA probes were designed complementary to the E6-E7 gene of HPV-16 DNA. The probes were covalently stained with Alexa Fluor 532 and hybridized to the target in solution. The individual hybridized molecules were imaged with an intensified charge-coupled device (ICCD) in two ways. In the single-color mode, target molecules were detected via fluorescence from hybridized probes only. This system could detect HPV-16 DNA in the presence of human genomic DNA down to 0.7 copy/cell and had a linear dynamic range of over 6 orders of magnitude. In the dual-color mode, we employed fluorescence resonance energy transfer and added YOYO-3 dye as the acceptor. The two colors from Alexa Fluor 532 and YOYO-3 were dispersed by a transmission grating located in front of the ICCD. With this reinforced criterion for identifying the hybridized molecules, zero false-positive count was achieved. We also showed that DNA extracts from Pap test specimens did not interfere with the measurements.

Laryngeal Squamous Cell Carcinoma Survival in the Context of Human Papillomavirus: A Systematic Review and Meta-analysis

BACKGROUND

Head and neck (H&N) squamous cell carcinoma (SCC) is a significant contributor to worldwide mortality and morbidity. Human papillomavirus (HPV) has been linked with H&N cancer and HPV-positive H&N SCC have been shown to have better survival outcomes.

OBJECTIVE

To evaluate the effect of human papillomavirus (HPV) on laryngeal carcinoma (LSCC) survival outcomes and prognosis.

METHOD

A systematic review and meta-analysis were performed using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. LSCC was confirmed based on histopathology, and HPV status was confirmed by either polymerase chain reaction, immunohistochemistry, and/or in-situ hybridization.

RESULTS

There were 1214 studies which were identified, of which 14 studies were eligible for our review. A total of 2,578 cases of LSCC were included in analysis with 413 (16.0%) HPV-positive. Overall survival (OS) was not significant for HPV-positive LSCC in first five years (year one: OR 1.44 p=0.13; year two: OR 1.24 p=0.30; year three: OR 1.01 p=0.97; year four: OR 1.13 p=0.63; year five: OR 1.01 p=0.98). Disease-free survival (DFS) was similarly not significant for HPV-positive LSCC (year one: OR 1.08 p=0.68; year two: OR 1.22, p=0.31; year three: OR 1.13, p=0.69; year four: OR 0.93, p=0.80 and year five: OR 1.42, p=0.30). When studies are sub-divided into global regions, Chinese studies had better HPV-positive survival compared to North American studies in year five (OR 1.84 vs OR 0.46, p=0.04).

CONCLUSION

This is the first study of its kind to evaluate the survival impact of HPV-positive LSCC patients. Unlike oropharyngeal cancer, HPV status does not make a difference to OS or DFS in LSCC. This supports data that HPV is not a prognostic factor in squamous carcinoma of the larynx.

Association of human papilloma virus infection and oral squamous cell carcinoma in Bangladesh

Oral squamous cell carcinoma is the sixth most common malignancy worldwide. In Bangladesh, it comprises 20% of the whole body malignancies. Several studies found that 15% to 25% of oropharyngeal cancer cases are associated with human papilloma virus (HPV). This study is done to find the association of human papilloma virus subtypes, particularly HPV type 16 and HPV type 18, with the oral squamous cell carcinoma in Bangladeshi patients. In total, 34 diagnosed patients of oral squamous cell carcinoma were included in the study. Extracted DNA from the cancerous tissues was checked for PCR reaction to detect the subtypes of human papilloma virus. Data of the present study suggest that oral squamous cell carcinoma are almost absent in Bangladeshi patients with human papilloma virus, particularly HPV 16 and 18.

ΔNp63γ/SRC/Slug Signaling Axis Promotes Epithelial-to-Mesenchymal Transition in Squamous Cancers

Purpose: To investigate the regulation of epithelial-to-mesenchymal transition (EMT) in head and neck squamous cell carcinoma (HNSCC) and its importance in tumor invasion.Experimental Design: We use a three-dimensional invasive organotypic raft culture model of human foreskin keratinocytes expressing the E6/E7 genes of the human papilloma virus-16, coupled with bioinformatic and IHC analysis of patient samples to investigate the role played by EMT in invasion and identify effectors and upstream regulatory pathways.Results: We identify SNAI2 (Slug) as a critical effector of EMT-activated downstream of TP63 overexpression in HNSCC. Splice-form-specific depletion and rescue experiments further identify the ΔNp63γ isoform as both necessary and sufficient to activate the SRC signaling axis and SNAI2-mediated EMT and invasion. Moreover, elevated SRC levels are associated with poor outcome in patients with HNSCC in The Cancer Genome Atlas dataset. Importantly, the effects on EMT and invasions and SNAI2 expression can be reversed by genetic or pharmacologic inhibition of SRC.Conclusions: Overexpression of ΔNp63γ modulates cell invasion by inducing targetable SRC-Slug-evoked EMT in HNSCC, which can be reversed by inhibitors of the SRC signaling. Clin Cancer Res; 24(16); 3917-27. ©2018 AACR.

Knowledge, Attitude, and Barriers Towards Human Papillomavirus (HPV) Vaccination Among Youths of Karachi, Pakistan

Introduction Human papillomavirus (HPV) is the most common infection of the reproductive tract. The introduction of HPV vaccines by WHO aims to reduce the incidence of cervical cancer. Pakistan lacks an effective nationwide HPV vaccination program, thereby making HPV a major threat. In this study, we aimed to assess the knowledge of HPV vaccination in Pakistan and to determine the barriers against it. Methods A cross-sectional study was conducted in Karachi, Pakistan, between April and May 2019. A convenience sampling technique was implemented using a self-administered questionnaire, which was filled by individuals aged 18-26. The questionnaire assessed the knowledge regarding HPV and also evaluated the attitude and acceptability amongst these individuals towards the vaccine. Data were analyzed using Statistical Package for Social Sciences (SPSS), version 20.0. Results The majority of the participants belonged to the monthly household income range of 200,000 rupees and above, which was labeled as the high-income category (n=158, 39.5%). Out of the 18 people who were vaccinated, eight belonged to the aforementioned category. Of these 18, nearly two-thirds (n=11, 61.1%) had gotten vaccinated upon the recommendation of their doctor. A statistically significant difference was found only between those currently enrolled in universities and previously vaccinated for HPV (p=.047). Nearly half of the responders perceived the vaccine to be time-consuming (n=167, 41.8%) and overpriced (n=187, 46.8%). Conclusion The vaccination rate is low in Karachi, Pakistan. Concentrated efforts involving the healthcare system should be made to raise awareness regarding HPV and its vaccine thereby reducing barriers to HPV prevention.

Recurrence and Disease-Free Survival in Head and Neck Squamous Cell Carcinoma After Margin-Free Resection on Frozen Section: An Institutional Perspective

Introduction

The most important factor determining survival in patients with head and neck squamous cell carcinoma (HNSCC) is a disease recurrence. A high rate of recurrence was noted in previous studies conducted in Pakistan; however, these studies did not consider margin status as inadequate margin clearance leads to disease recurrence. In this study, we determined cancer recurrence in patients with HNSCC after nullifying this factor.

Methods

This cross-sectional observational study was conducted in Liaquat National Hospital (LNH) for a duration of three years. Data collection period was from January 2015 to December 2017. A total of 150 patients that underwent surgery at LNH for HNSCC with margin-free frozen sections were included in the study. Pathological tumor characteristics such as tumor type, size, depth of invasion and nodal status were determined.

Results

The mean age of the patients was 50.31±12.90 with mean tumor size of 3.38±1.76. Nodal metastases were present in 45.3% cases with 17.3% showing extranodal extension. Recurrence was observed in 66% of cases with median disease-free survival of 12 months and perineural invasion was noted in 12% cases. We found a significant association of disease recurrence with larger tumor size, depth of invasion and extranodal extension. Moreover, younger age (<30 years) and older age (>50 years) groups showed higher rates of recurrence than the middle age group (30-50 years). Similarly, univariate and multivariate analyses revealed that tumors with ≥1 cm depth of invasion and the presence of extranodal extension were more likely to have disease recurrence than tumors with <1 cm depth of invasion and without extranodal extension. Survival analysis using the Kaplan-Meier method for HNSCC revealed a significant difference in disease-free survival in patients with more than 2 cm tumor size and ≥1 cm depth of invasion than cases with ≤ 2cm tumor size and <1 cm depth of invasion.

Conclusion

A high rate of disease recurrence for HNSSC was noted in our study, despite margin-free primary tumor resection. Apart from tumor size and depth of invasion, extranodal extension was significantly associated with disease recurrence in HNSCC. This signifies a need for margin evaluation of neck dissection specimen in cases with extranodal extension.

A case report: Does the ulcer belong to esophageal carcinoma or HIV?

RATIONALE

The deep-rooted pathogenesis of the human papilloma virus (HPV) infection is still uncertain and argumentative. As we know, a lot of cases of esophageal infections, such as esophageal squamous cell carcinoma (ESCC) and esophageal squamous papilloma (ESP), associated with HPV are reported. However, primary esophageal ulcer infection associated with HPV is unusual.

PATIENT CONCERNS

This case is different from the other reports associated with HPV due to the patient's favorable prognosis.

DIAGNOSES

We present a case of a man diagnosed in the Gastroenterology Department of Tianjin Hospital of Integrated Traditional Chinese and Western Medicine, which presented a deep and big esophageal ulcer with irregular borders caused by type 16 HPV infection.

INTERVENTIONS

The esophageal ulcer was treated with vidarabine monophosphate treatment.

OUTCOME

The esophageal ulcer was cured.

LESSONS

We could put forward the diagnostic criteria available for diagnostic guidelines and 2 hypotheses that could possibly prevent esophageal carcinoma from happening.

First Case of the Cervical Lymph Node as the Only Site of Metastasis from Anal Cancer

Anal squamous cell carcinoma was a previously uncommon malignancy that has steadily increased in incidence with the increased prevalence of human papillomavirus (HPV) and human immunodeficiency virus (HIV). Anal squamous cell carcinoma is typically characterized by local and regional involvement and distant metastases are far less common. Here, we report a case of a 36-year-old female initially diagnosed with anal squamous cell carcinoma manifesting as an anal mass along with an enlarged inguinal lymph node. After receiving chemoradiation therapy, she remained disease-free until recently, when she presented with an isolated left infraclavicular lymph node found on physical examination followed by a biopsy that was consistent with recurrent anal squamous cell carcinoma. The positron emission tomography–computed tomography (PET-CT) uptake of her original left inguinal lymph node was decreased, suggesting improved regional disease, and no other metastases were found. Our case represents a rare occurrence of metastatic anal squamous cell carcinoma to an isolated distal lymph node and reminds physicians not to forget a unusual site of metastasis and prevent any delay in treatment. 

Diagnostic Challenges and Long-term Outcomes of Neuroendocrine Carcinoma of the Cervix: A Case Series

Neuroendocrine carcinomas (NECs) of the cervix are rare, aggressive malignancies that are challenging to diagnose and treat. They are high-grade lesions that often share features with poorly differentiated adenocarcinoma and squamous cell carcinoma. NECs are classified into large-cell or small-cell subtypes but can often have a mixed appearance or occur concurrently with a squamous or adenocarcinoma. Diagnosis is dependent on tissue sampling, histomorphology, and immunohistochemistry. Eight cases of NEC were retrieved from the Department of Pathology at our institution from 2008 to 2022. Tumor slides were reviewed and evaluated by 2 independent pathologists. Seven of 8 patients tested positive for neuroendocrine markers, including CD56, synaptophysin, and chromogranin. We discuss the diagnostic challenges, review the histopathology, and describe the treatment courses and clinical outcomes. This case series reveals that traditional markers, such as p16, p63, and p40, may be focally positive in NEC and should not be considered a confirmation of squamous cell carcinoma. Patient outcomes can be affected by delays in diagnosis, misdiagnosis, and inadequate treatment when NEC is not considered in the initial differential diagnosis.

Anal Squamous Cell Carcinoma in a Patient with Myasthenia Gravis: Is Immunosuppression the Main Underlying Etiology?

Patients who are immunocompromised by diseases such as human immunodeficiency virus (HIV) infection are more prone to develop some malignancies such as Kaposi's sarcoma and central nervous system (CNS) lymphomas. Historically, anal squamous cell carcinoma (SCC) was also included on the list as an acquired immunodeficiency syndrome (AIDs)-defining cancer.  Similarly, compromised immune disorders including severe immunosuppression, haematologic malignancies, and solid organ transplantation have been identified as important risk factors for the development of anal SCC. Review of the medical literature showed only sporadic cases of anal SCC in patients with pre-existing myasthenia gravis (MG), with or without thymoma.  We present here a case of anal SCC in a patient with several years history of MG who was receiving intravenous immunoglobulin (IVIG).  We believe this association is explained by the autoimmune nature of the disease and the use of immunosuppressive medications to treat it. To further support our case, we also present a review of the literature associating anal SCC with MG.