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Open research questions in Head and Neck Cancer Studies

977 gap statements mined from Head and Neck Cancer Studies papers in our 7.9M-paper local library, which holds 5,536 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

Choosing where to publish on Head and Neck Cancer Studies? See the ranked Medicine journals.

What the literature leaves open

  • Potential sources of bias, including residual bias that cannot be fully excluded. The need for comprehensive review of electronic records to mitigate bias.

    Implementation of ultrasound surveillance following negative sentinel lymph node biopsy in early oral squamous cell carcinoma: a retrospective cohort study · 2026 · DOI

  • The need to integrate clinical and dosimetric predictors of tube-independence with a confounder-adjusted, bias-corrected survival endpoint.

    Predictors of time to feeding-tube independence in locally advanced head and neck cancer · 2026 · DOI

  • The complexity of treating locally advanced OPSCC, which often requires multimodal approaches. The need to balance oncologic control with preservation of function in OPSCC treatment. The potential for treatment-related morbidity, such as xerostomia and dysphagia, in OPSCC patients.

    Surgery Versus Chemoradiation Therapy for Oropharyngeal Squamous Cell Carcinoma: A Multidimensional Cross-Sectional Study · 2025 · DOI

  • The study noted that the small sample sizes across the included studies limit the generalizability of the findings. The lack of longitudinal studies and the limited follow-up periods in existing studies are significant challenges.

    Wearable Technologies in Head and Neck Oncology: Scoping Review · 2025 · DOI

  • One challenge is the complexity of the molecular mechanisms underlying OSCC. Another challenge is the need for effective therapeutic targets for OSCC. The paper also highlights the challenge of understanding the role of environmental factors, such as UV radiation, in the development of OSCC.

    Pathogenesis and Therapy of Oral Carcinogenesis · 2024 · DOI

  • There is limited data and quantification of (occult) lymphatic spread and the required extent of the elective CTV.

    Personalized volume de-escalated elective nodal irradiation in oropharyngeal squamous cell carcinoma (DeEscO): a study protocol · 2026 · DOI

  • Management remains controversial, particularly regarding the clinical staging and the optimal treatment of the primary lesion.

    Oncological outcomes involving interventional radiotherapy (brachytherapy) on the primary lesion and surgery on the neck for squamous cell carcinomas of the nasal vestibule · 2026 · DOI

  • Squamous cell carcinoma of the nasal vestibule (SCC-NV) is an under-recognized often misclassified malignancy, also due to the lack of a specific ICD-O topographic code.

    Oncological outcomes involving interventional radiotherapy (brachytherapy) on the primary lesion and surgery on the neck for squamous cell carcinomas of the nasal vestibule · 2026 · DOI

  • Radiosensitivity biomarkers hold promise for personalized radiotherapy but their clinical maturity and acceptability remain uncertain in head and neck cancer (HNC).

    Defining physician acceptance of radiosensitivity testing for guiding therapeutic interventions in head and neck cancer: A Delphi consensus study · 2026 · DOI

  • Partial agreement was observed for radiosensitivity testing in complex cases and for proton referral in high-risk patients, while preventive gastrostomy showed no consensus.

    Defining physician acceptance of radiosensitivity testing for guiding therapeutic interventions in head and neck cancer: A Delphi consensus study · 2026 · DOI

  • The optimal treatment strategy between definitive radiotherapy and concurrent chemoradiotherapy (CCRT) for patients with T1–2 head and neck cancer with low-volume nodal disease remains unclear due to limited supporting data.

    Survival outcomes of radiotherapy alone versus concurrent chemoradiotherapy in T1–2 head and neck cancer with low-volume disease: A multicenter cohort study · 2026 · DOI

  • However, the existing literature remains scarce and fragmented, in part because studies often combine different tumor sites and treatment modalities under the broad HNC category.

    Characterizing sleep-related complaints in head and neck cancer survivors with tumors of airway relevance following radiotherapy · 2026 · DOI

  • The applicability of the ninth version AJCC/UICC N classification for nasopharyngeal carcinoma (NPC) in non-endemic regions remains uncertain, particularly regarding the incorporation of advanced extranodal extension (ENE) into the N3 category.

    Validation and refinement of the N classification for nasopharyngeal carcinoma based on the 9th version AJCC/UICC TNM staging system in non-endemic regions of China: a multicenter cohort study · 2026 · DOI

  • These findings support individualized multidisciplinary treatment selection while prospective comparative studies remain warranted.

    Surgery followed by adjuvant radiotherapy versus definitive radiotherapy for locally advanced squamous cell carcinoma of the pharynx and larynx: a propensity score-matched analysis · 2026 · DOI

  • Although conventionally fractionated RT remains the current standard, limited data exist on the role of hypofractionated RT (HFRT) in adjuvant setting.

    Commencement of Hypofractionated Adjuvant Radiation Therapy in Intermediate-Risk Oral Cavity Cancer: A Phase 1 Study Protocol (CHARIOT-1) · 2026 · DOI

  • For locoregionally advanced hypopharyngeal carcinoma (LAHPC), organ preservation via induction chemotherapy followed by concurrent chemoradiotherapy (IC-CCRT) is a key strategy, yet robust data from homogeneous cohorts treated with modern radiation therapy are scarce.

    Efficacy and Safety of Induction Chemotherapy Followed by Concurrent Chemoradiotherapy in Locoregionally Advanced Hypopharyngeal Carcinoma · 2026 · DOI

  • The developed nomogram provides moderate prognostic accuracy and may serve as a supplementary tool for risk stratification and clinical discussion, though external validation is warranted.

    Comparison of survival and establishment of prognostic models for patients with locally advanced squamous cell carcinoma of the hypopharynx at different sites: A retrospective study based on the SEER database · 2026 · DOI

  • Prior studies have focused on the acute treatment phase, but the study shows that the psychological burden persists in the general practice setting.

    Subsequent depression in patients with lip and head and neck cancer: a population-based primary care analysis · 2026 · DOI

  • The local recurrence and survival benefit from adjuvant radiation therapy is poorly understood in patients with intermediate risk factors including perineural invasion (PNI).

    Outcomes of patients with oral cavity squamous cell carcinomas with perineural invasion treated with adjuvant intensity modulated radiation therapy (IMRT) · 2026 · DOI

  • Salvage surgery or chemotherapy are standard options but often limited by anatomy or patient condition, leaving re-irradiation as the only feasible choice in selected cases2.

    Preventing Carotid Blowout: Planned Carotid Sacrifice and Cerebral Revascularization Enabling Second Reirradiation in Recurrent Nasopharyngeal Carcinoma · 2026 · DOI

  • Afferent baroreflex failure (ABF) is an underrecognized late complication of radiation therapy (RT) in oropharyngeal cancer (OPC) survivors.

    Overlap of Afferent Baroreflex Failure and Lower Cranial Neuropathies in Long-term Oropharyngeal Cancer Survivors Postradiation Therapy: Secondary Analysis of a Prospective Registry Cohort · 2026 · DOI

  • Small sample size of 30 patients, - Limited follow-up period of over 12 months, - Exclusion of patients with neurological and/or psychiatric…

    Surgery Versus Chemoradiation Therapy for Oropharyngeal Squamous Cell Carcinoma: A Multidimensional Cross-Sectional Study · 2025 · DOI

  • Small sample size (single patient), - Limited generalizability, - Technical challenges…

    Transoral robotic reconstruction of a posterior palatal defect using an upper arm flap following polymorphous adenocarcinoma resection: a novel minimally invasive approach · 2026 · DOI

  • Investigation of long-term outcomes, - Comparison with conventional microsurgery, - Development of new supermicrosurgical…

    Transoral robotic reconstruction of a posterior palatal defect using an upper arm flap following polymorphous adenocarcinoma resection: a novel minimally invasive approach · 2026 · DOI

  • Further studies are needed to integrate clinical and dosimetric predictors of tube-independence with a confounder-adjusted, bias-corrected survival endpoint, - Research on validated prediction models that combine pre-treatment weight loss, T-and N-stage, and other factors to estimate survival…

    Predictors of time to feeding-tube independence in locally advanced head and neck cancer · 2026 · DOI

Most-cited papers in Head and Neck Cancer Studies

Most recent work

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Open questions raised by papers listed on this page include: (1) There is limited data and quantification of (occult) lymphatic spread and the required extent of the elective CTV (“Personalized volume de-escalated elective nodal irradiation in oropharyngeal…”, 2026); (2) Management remains controversial, particularly regarding the clinical staging and the optimal treatment of the primary lesion (“Oncological outcomes involving interventional radiotherapy (brachytherapy) on…”, 2026); (3) The optimal treatment strategy between definitive radiotherapy and concurrent chemoradiotherapy (CCRT) for patients with T1–2 head and neck cancer with low-volume nodal disease remains unclear due to limited supporting data (“Survival outcomes of radiotherapy alone versus concurrent chemoradiotherapy in…”, 2026); (4) The existing literature remains scarce and fragmented, in part because studies often combine different tumor sites and treatment modalities under the broad HNC category (“Characterizing sleep-related complaints in head and neck cancer survivors with…”, 2026); (5) The developed nomogram provides moderate prognostic accuracy and may serve as a supplementary tool for risk stratification and clinical discussion, though external validation is warranted (“Comparison of survival and establishment of prognostic models for patients with…”, 2026). 977 gap statements have been mined from Head and Neck Cancer Studies papers in our 7.9M-paper local library, which holds 5,536 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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