High-yield, feasible thesis topics in head and neck surgical oncology

Oral cavity cancer

1. Pattern of cervical nodal metastasis in clinically node-negative oral tongue squamous cell carcinoma
   • Design: Retrospective cohort of patients undergoing elective neck dissection.
   • Primary outcome: Occult nodal metastasis rate by DOI, grade, PNI, LVI, and tumor subsite.
   • Useful output: Local threshold for elective neck dissection.
2. Does depth of invasion predict occult nodal disease and survival in early oral cavity SCC?
   • Compare DOI categories with pN status, recurrence, disease-free survival.
   • Add tumor budding or worst pattern of invasion if pathology reporting is available.
3. Margin status after oral cavity cancer surgery: predictors, re-resection practice, and oncologic outcome
   • Define close and positive margins prospectively before analysis.
   • Outcomes: Final margin clearance, local recurrence, adjuvant treatment, survival.
4. Accuracy of preoperative imaging for mandibular invasion in gingivobuccal or lower alveolar SCC
   • Compare CT and/or MRI reports against final histopathology.
   • Outcomes: Sensitivity, specificity, positive predictive value, and unnecessary segmental mandibulectomy.
5. Marginal versus segmental mandibulectomy for oral cavity SCC with suspected mandibular involvement
   • Design: Retrospective comparative cohort with careful adjustment for stage and extent of bone invasion.
   • Outcomes: Local control, mandibular recurrence, complications, swallowing, and feeding-tube dependence.
6. Prognostic significance of perineural invasion in resected oral cavity SCC
   • Outcomes: Locoregional recurrence, disease-free survival, and whether PNI altered adjuvant treatment.
7. Delay from diagnostic biopsy to definitive surgery in oral cavity cancer and its association with stage progression or outcomes
   • A service-delivery project with direct local relevance.
   • Include patient, referral, imaging, dental clearance, and operating-room causes of delay.

Neck dissection and regional disease

1. Yield and clinical value of level IIb dissection in oral cavity SCC
   • Identify the frequency of occult level IIb disease and its association with level IIa or multilevel nodal disease.
   • A focused surgical-anatomy and morbidity topic.
2. Selective versus modified radical neck dissection in node-positive oral cavity cancer
   • Outcomes: Nodal yield, regional control, shoulder dysfunction, and survival.
   • Ensure stage matching to reduce selection bias.
3. Lymph-node ratio, lymph-node density, and extranodal extension as prognostic markers after neck dissection

• Often feasible from pathology databases.
• Outcomes: Disease-free and overall survival.

1. Shoulder dysfunction after neck dissection: incidence, predictors, and recovery

• Prospective study using the Shoulder Pain and Disability Index, range of movement, or validated functional scores.
• Compare selective, modified radical, and level V dissection.

1. Ultrasound-guided FNAC versus imaging alone for evaluating post-treatment cervical nodes

• Diagnostic-accuracy design using pathology or longitudinal follow-up as the reference standard.

Oropharyngeal and HPV-associated disease

1. Oncologic and functional outcomes after transoral surgery for HPV-associated oropharyngeal SCC

• Outcomes: Margin status, nodal disease, adjuvant chemoradiation, gastrostomy dependence, swallowing scores, recurrence.
• Particularly relevant in units offering TORS or transoral laser microsurgery. Current guidelines continue to address TORS indications and postoperative care, while functional outcomes and avoiding trimodality treatment remain important questions (European TORS guideline).

1. Predictors of trimodality treatment after primary transoral surgery for oropharyngeal SCC

• Core question: Which preoperative features predict surgery followed by both radiotherapy and chemotherapy?
• Outcomes: Pathologic ENE, margins, number/size of nodes, and patient-reported swallowing outcomes.

1. Clinicopathologic comparison of HPV-positive versus HPV-negative oropharyngeal SCC treated surgically

• Compare nodal burden, ENE, margin status, recurrence patterns, and survival.
• Do not treat HPV status as a sole surrogate for treatment selection without accounting for smoking and stage.

1. Postoperative circulating HPV DNA kinetics after transoral surgery for HPV-positive OPSCC

• Best as a prospective pilot if access to a validated assay is available.
• Outcomes: Clearance timing, correlation with residual disease and recurrence.
• This is promising but should be framed as an exploratory biomarker study, not a practice-changing surveillance test.

Larynx, hypopharynx, and salvage surgery

1. Complications and functional outcomes after salvage total laryngectomy

• Outcomes: Pharyngocutaneous fistula, wound complication, hospital stay, feeding status, speech rehabilitation, and mortality.
• Assess prior radiation dose, interval since radiation, nutrition, anemia, and flap reconstruction.

1. Does vascularized tissue augmentation reduce pharyngocutaneous fistula after salvage laryngectomy?

• Compare primary closure versus pectoralis major flap or free-flap augmentation.
• Strong, clinically meaningful topic if sufficient numbers are available.

1. Nutritional and inflammatory predictors of pharyngocutaneous fistula following laryngectomy

• Variables: Albumin, hemoglobin, BMI, sarcopenia measures, diabetes, prior radiation, tracheostomy.
• Simple, feasible, and potentially actionable.

1. Functional larynx preservation after organ-preservation failure: outcomes of salvage surgery

• Assess survival alongside voice, swallowing, permanent feeding tube, and tracheostomy status.

Reconstruction and perioperative outcomes

1. Free-flap failure and major complication predictors in head and neck reconstruction

• Outcomes: Flap re-exploration, flap loss, wound infection, thrombosis, return to theatre.
• Variables: Operative duration, recipient vessels, anemia, diabetes, prior radiotherapy, smoking, and anticoagulation.

1. Comparison of fibula free flap and reconstruction plate for segmental mandibular defects

• Outcomes: Wound complications, plate exposure, speech, diet, quality of life, and secondary operations.
• Restrict to comparable defect types to avoid confounding.

1. Sarcopenia on routine staging CT as a predictor of postoperative complications after major head and neck cancer surgery

• Measure skeletal muscle area at C3, if imaging software and radiology support are available.
• Outcomes: Clavien-Dindo complications, length of stay, readmission, and treatment completion.

1. Enhanced Recovery After Surgery pathway in major head and neck oncologic surgery

• Before-and-after implementation study.
• Outcomes: Length of stay, opioid use, feeding-tube timing, complications, readmissions, and cost.
• Good option if your department wants a quality-improvement thesis.

1. Predictors of unplanned 30-day readmission following head and neck cancer surgery

• Outcomes: Readmission cause, timing, preventability, and cost.
• Practical variables include wound issues, dehydration, aspiration, feeding-tube problems, and tracheostomy care.

Recurrent disease and palliative surgery

1. Outcomes of salvage surgery for recurrent oral cavity SCC

• Outcomes: Resectability, margin status, complications, survival, and factors predicting benefit.
• Important to distinguish local, regional, and locoregional recurrences.

1. Development and internal validation of a prognostic score for salvage surgery in recurrent head and neck SCC

• Candidate factors: Disease-free interval, site, prior radiotherapy, performance status, nutritional status, margin feasibility, and nodal recurrence.
• Requires a reasonably large cohort and statistical mentorship.

1. Role of palliative surgical procedures in advanced head and neck cancer

• Focus on tracheostomy, feeding access, bleeding control, wound care, or symptom relief.
• Outcomes should be patient-centered: symptom change, hospital days, complications, and ability to receive systemic treatment.

Emerging and publication-oriented topics

1. ctDNA as a prognostic biomarker in surgically treated HPV-negative head and neck SCC

• Best as a systematic review and meta-analysis if local assay access is limited.
• A recent meta-analysis specifically addresses ctDNA and survival in HPV-negative disease (PubMed record).

1. A systematic review of surgery alone for carcinoma of unknown primary in the head and neck

• Focus: Selection criteria, outcomes, and quality of evidence.
• A 2025 systematic review examined which patients with head and neck SCC of unknown primary may be candidates for surgery as sole therapy (Takhar et al.).

1. Systematic review of surgical debulking in unresectable head and neck cancer

• Define debulking clearly: airway relief, bleeding, dysphagia, tumor burden, or facilitation of other treatment.
• Recent evidence remains limited and heterogeneous, leaving a useful gap for a carefully designed review (2026 systematic review).

1. Cost-effectiveness of transoral surgery versus nonsurgical treatment for selected oropharyngeal cancer

• Requires reliable cost data and health-utility or quality-of-life data.
• Better for centers with health-economics support.

Best choices by feasibility

Five thesis titles I would prioritize

1. Depth of invasion, worst pattern of invasion, and occult cervical nodal metastasis in clinically node-negative oral cavity squamous cell carcinoma: a retrospective cohort study.
2. Predictors and oncologic impact of close and positive surgical margins after curative-intent resection of oral cavity squamous cell carcinoma.
3. Predictors of pharyngocutaneous fistula and functional recovery after salvage total laryngectomy: a retrospective cohort study.
4. Clinicopathologic predictors of adjuvant chemoradiotherapy after primary transoral surgery for oropharyngeal squamous cell carcinoma.
5. Sarcopenia measured on preoperative staging CT and postoperative morbidity after major head and neck cancer resection with free-flap reconstruction.

Before finalizing a topic

• At least 80-100 eligible retrospective cases, where possible.
• A clearly defined primary endpoint, not several equal endpoints.
• Standardized pathology and follow-up records.
• A question that can change local decision-making or perioperative care.
• Early input from pathology, radiation oncology, radiology, statistics, and speech/swallow rehabilitation.

Thesis topics in thyroid cancer for surgical oncology residents

1. Papillary thyroid carcinoma and extent of thyroidectomy

1. Predictors of completion thyroidectomy after initial hemithyroidectomy for indeterminate thyroid nodules
   • Population: Bethesda III/IV or Bethesda V nodules treated initially by lobectomy.
   • Outcomes: Final malignancy rate, high-risk pathology, need for completion thyroidectomy, complications, and time to definitive treatment.
2. Hemithyroidectomy versus total thyroidectomy for low-risk papillary thyroid carcinoma
   • Outcomes: Recurrence, reoperation, radioiodine requirement, thyroglobulin surveillance, recurrent laryngeal nerve injury, hypocalcemia, and need for lifelong thyroid hormone replacement.
   • Important: Restrict to a well-defined low-risk group.
3. Clinicopathologic predictors of contralateral occult carcinoma in patients undergoing completion thyroidectomy
   • A practical project for deciding which patients actually benefit from completion surgery.
4. Impact of multifocality on recurrence in low-risk papillary thyroid carcinoma
   • Compare unifocal and multifocal PTC after accounting for tumor size, lymph-node metastasis, extrathyroidal extension, and treatment extent.
5. Association of microscopic extrathyroidal extension with recurrence and postoperative treatment decisions
   • Examine whether microscopic ETE led to total thyroidectomy, radioiodine, or intensified surveillance and whether it independently predicted recurrence.

2. Central and lateral neck disease

1. Predictors of occult central lymph-node metastasis in clinically node-negative papillary thyroid carcinoma
   • Variables: Age, sex, tumor size, location, multifocality, lymphovascular invasion, microscopic ETE, and BRAF status if available.
   • Outcome: Histopathological central nodal metastasis after central neck dissection.
2. Does prophylactic central neck dissection improve outcomes in clinically node-negative papillary thyroid cancer?
   • Compare thyroidectomy alone with thyroidectomy plus prophylactic central neck dissection.
   • Outcomes: Recurrence, reoperation, permanent hypoparathyroidism, and recurrent laryngeal nerve palsy.
   • This is highly relevant because contemporary guidance discourages routine prophylactic central neck dissection in cN0 PTC (ATA update).
3. Pattern of nodal metastasis in papillary thyroid carcinoma: central versus lateral compartment disease
   • Assess skip metastasis and predictors of lateral-node involvement.
   • Useful for refining local preoperative ultrasound and neck-dissection strategies.
4. Diagnostic accuracy of preoperative ultrasound for central and lateral cervical lymph-node metastasis in PTC
   • Reference standard: Histopathology.
   • Report sensitivity, specificity, positive predictive value, negative predictive value, and false-negative pattern by nodal compartment.
5. Utility of thyroglobulin washout from fine-needle aspiration of suspicious cervical nodes

• Diagnostic-accuracy study against cytology and/or surgical pathology.
• Particularly suitable if your institution routinely performs ultrasound-guided nodal aspiration.

1. Outcomes after lateral compartment neck dissection for metastatic papillary thyroid carcinoma

• Outcomes: Nodal yield, nodal ratio, recurrence, chyle leak, shoulder dysfunction, hypoparathyroidism, and recurrent laryngeal nerve injury.

1. Lymph-node ratio as a predictor of persistent or recurrent disease after therapeutic neck dissection

• A strong pathology-based retrospective topic.
• Compare total positive nodes, nodal ratio, extranodal extension, and size of metastatic deposits.

3. Preoperative diagnostics and indeterminate nodules

1. Correlation of Bethesda cytology with final histopathology in a tertiary cancer center

• A classic, achievable audit.
• Calculate malignancy rate within each Bethesda category and identify causes of false-positive and false-negative cytology.

1. Performance of ACR TI-RADS or EU-TIRADS in predicting malignancy in thyroid nodules

• Compare ultrasound category, FNA recommendation, Bethesda result, and final pathology.
• Could assess whether the system reduces unnecessary FNA in your population.

1. Predictors of malignancy in Bethesda III and IV thyroid nodules

• Variables: Ultrasound features, nodule size, cytology subtype, repeat FNA, molecular testing, and patient age.
• Outcome: Final malignancy rate after surgery.

1. Role of molecular testing in surgical decision-making for indeterminate thyroid nodules

• Feasible only if your center uses molecular assays.
• Outcomes: Avoided diagnostic surgery, false-negative results, completion thyroidectomy, and cost-effectiveness.

1. Value of preoperative CT in detecting gross extrathyroidal extension and nodal metastases

• Compare CT and ultrasound with operative findings and pathology.
• Particularly useful in large tumors, retrosternal extension, or invasive disease.

4. Surgical complications, functional outcomes, and quality improvement

1. Risk factors for transient and permanent hypoparathyroidism after total thyroidectomy

• Variables: Graves disease, thyroiditis, central neck dissection, reoperation, surgeon volume, parathyroid autotransplantation, and postoperative PTH.
• Outcomes should use explicit definitions of transient and permanent hypoparathyroidism.

1. Predictive value of early postoperative parathyroid hormone for clinically significant hypocalcemia

• Assess the best local PTH threshold and timing to guide selective calcium/calcitriol supplementation and safe discharge.

1. Recurrent laryngeal nerve palsy after thyroid cancer surgery: incidence, risk factors, and recovery

• Include routine preoperative and postoperative laryngoscopy where available.
• Separate temporary from persistent palsy.

1. Does intraoperative nerve monitoring reduce recurrent laryngeal nerve injury in thyroid cancer surgery?

• Compare monitored and non-monitored cases, preferably after controlling for tumor stage, reoperation, and gross invasion.

1. Predictors of postoperative hematoma and unplanned re-exploration after thyroidectomy

• A high-impact safety project.
• Include anticoagulant use, hypertension, extent of surgery, drain use, and timing of bleeding.

1. Day-care or early discharge after uncomplicated thyroidectomy: safety and readmission outcomes

• Outcomes: Hematoma, symptomatic hypocalcemia, emergency visit, readmission, patient satisfaction, and cost.

1. Sarcopenia on preoperative CT and postoperative morbidity after thyroid cancer surgery

• Particularly relevant in older patients with locally advanced disease requiring neck dissection or aerodigestive resection.

1. Patient-reported voice and swallowing outcomes after thyroidectomy with or without neck dissection

• Use validated tools such as VHI-10, Voice Handicap Index, EAT-10, or ThyPRO.
• Strong prospective, patient-centered project.

5. Active surveillance and de-escalation

1. Outcomes of active surveillance for papillary thyroid microcarcinoma

• Outcomes: Tumor growth, development of nodal metastasis, conversion to surgery, pathological findings after delayed surgery, and anxiety/quality of life.
• This can be prospective, even with modest numbers.

1. Patient and clinician factors influencing acceptance of active surveillance for low-risk papillary thyroid microcarcinoma

• Survey or mixed-methods design.
• Include perceptions of cancer, fear of progression, follow-up burden, cost, and trust in surveillance.

1. Oncologic and functional outcomes of delayed surgery after active surveillance of papillary microcarcinoma

• A useful longitudinal study if your center has an established surveillance pathway.

1. Potential overtreatment in low-risk differentiated thyroid cancer

• Audit the proportion receiving total thyroidectomy, central neck dissection, or radioiodine despite contemporary low-risk eligibility criteria.

6. Recurrent disease and reoperative surgery

1. Outcomes of reoperative central neck dissection for persistent or recurrent papillary thyroid carcinoma

• Outcomes: Biochemical response, structural control, recurrent laryngeal nerve injury, permanent hypoparathyroidism, and further recurrence.

1. Predictors of structural recurrence after initial treatment of differentiated thyroid cancer

• Variables: ATA risk class, nodal burden, extranodal extension, margin status, thyroglobulin trend, radioiodine use, and response-to-therapy category.

1. Diagnostic value of stimulated versus suppressed thyroglobulin in detecting recurrent differentiated thyroid cancer

• Correlate with structural recurrence on ultrasound, CT, radioiodine scan, or pathology.

1. Role of compartment-oriented neck dissection versus targeted node excision in recurrent papillary thyroid carcinoma

• Compare recurrence, complications, and reoperative morbidity.
• Needs careful case selection because targeted excision may be chosen for more limited disease.

7. Aggressive histology and locally advanced disease

1. Clinicopathologic profile and outcomes of tall-cell variant papillary thyroid carcinoma

• Compare with conventional PTC: nodal metastasis, recurrence, radioiodine avidity, and survival.

1. Management and outcomes of poorly differentiated thyroid carcinoma

• A multicenter retrospective study may be needed because of low case numbers.
• Variables: Surgical margin, vascular invasion, radioiodine use, external-beam radiotherapy, and systemic therapy.

1. Predictors of aerodigestive tract invasion in differentiated thyroid carcinoma

• Outcomes: Tracheal, esophageal, or recurrent laryngeal nerve invasion; resection approach; margin status; recurrence; and airway function.

1. Shave excision versus full-thickness tracheal resection for differentiated thyroid cancer with tracheal invasion

• Best undertaken as a systematic review or multicenter cohort because individual institutional volume may be low.

1. Surgical outcomes in anaplastic thyroid carcinoma

• Focus: Patient selection for surgery, R0/R1/R2 resection, airway intervention, timing of systemic therapy, complications, and survival.
• Requires multidisciplinary data and should be interpreted cautiously because of strong selection bias.

8. Medullary thyroid carcinoma

1. Correlation of preoperative calcitonin with lymph-node burden in medullary thyroid carcinoma

• Outcomes: Central and lateral nodal disease, distant metastasis, biochemical cure, and recurrence.

1. Completeness of germline RET testing and family cascade screening in medullary thyroid carcinoma

• A high-value clinical audit with direct implications for relatives and hereditary cancer care.

1. Initial operation and biochemical cure in sporadic medullary thyroid carcinoma

• Compare extent of thyroidectomy and neck dissection with postoperative calcitonin normalization.
• Surgical planning remains central in MTC, but evidence for the ideal initial operative strategy is limited and varies by nodal risk (recent systematic review).

1. Calcitonin and carcinoembryonic antigen doubling times as predictors of recurrence in medullary thyroid carcinoma

• Longitudinal biochemical and survival analysis.

9. Systematic review or meta-analysis topics

1. Prophylactic central neck dissection versus thyroidectomy alone in clinically node-negative papillary thyroid carcinoma: systematic review and meta-analysis.
2. Lobectomy versus total thyroidectomy for low-risk papillary thyroid carcinoma: oncologic and complication outcomes.
3. Active surveillance versus immediate surgery for papillary thyroid microcarcinoma: systematic review of oncologic and quality-of-life outcomes.
4. Predictive value of molecular testing in Bethesda III and IV thyroid nodules: systematic review and meta-analysis.
5. Risk factors for permanent hypoparathyroidism after total thyroidectomy: systematic review and meta-analysis.
6. Surgical management of thyroglossal duct carcinoma: systematic review.

• This is rare but has recent literature, including a 2026 systematic review on the role of thyroidectomy (IJtsma et al.).

Five particularly strong, feasible thesis titles

1. Predictors of occult central cervical lymph-node metastasis in clinically node-negative papillary thyroid carcinoma: a retrospective cohort study.
2. Hypoparathyroidism after total thyroidectomy for thyroid cancer: incidence, predictors, and utility of early postoperative parathyroid hormone measurement.
3. Diagnostic accuracy of preoperative ultrasonography for central and lateral nodal metastasis in papillary thyroid carcinoma.
4. Clinicopathological predictors of malignancy and completion thyroidectomy in Bethesda III and IV thyroid nodules.
5. Oncologic outcomes and complications of prophylactic central neck dissection in clinically node-negative papillary thyroid carcinoma.

Best choice by local resources