Omar A Karadaghy studies methods for reconstructing the head and neck following cancer treatment or trauma. He specifically looks at how different surgical techniques affect the recovery and quality of life for patients. His research includes the use of various tissue grafts taken from the legs or arms, assessing their impacts on mobility and long-term function. For instance, he explores the use of calf tissue versus thigh and fibula tissue to determine which provides the least damage and quickest recovery for patients undergoing cancer surgery.
Key findings
Patients who received calf grafts for head and neck reconstruction regained their leg function faster and demonstrated better mobility at one year compared to those who received thigh or fibula grafts.
Approximately 2.5% of patients treated for HPV-associated throat cancer developed a second type of throat cancer not caused by HPV, usually about 9 years after the first diagnosis.
The medial sural artery perforator flap technique resulted in significant improvement in leg function over 6-12 months after surgery, with patients reaching nearly normal function within a year.
Reconstruction using the osteocutaneous radial forearm free flap allowed three patients to successfully rebuild their noses in one operation, achieving good cosmetic results without major complications.
Frequently asked questions
Does Dr. Karadaghy study any types of cancer?
Yes, he specifically studies head and neck cancer and its reconstructive treatments.
What treatments has Dr. Karadaghy researched for head and neck reconstruction?
He has researched various graft techniques, such as the medial sural artery perforator flap and the osteocutaneous radial forearm free flap, to improve reconstruction outcomes.
Is Dr. Karadaghy's work relevant to patients with HPV-related throat cancer?
Yes, his findings highlight the need for ongoing monitoring and testing for HPV-independent cancers in patients previously treated for HPV-related cancer.
How does donor site morbidity affect surgery choices?
His research indicates that some grafts, like calf tissue, cause less damage and faster recovery for patients, influencing which graft surgeons choose.
What are the benefits of the medial sural artery perforator flap?
This flap technique minimizes lasting damage to the donor leg and improves recovery time for patients undergoing head and neck reconstruction.
Publications in plain English
Donor Site Morbidity of Lower Extremity Free Flaps After Reconstructive Surgery of the Head and Neck, a Single-Center Retrospective Cohort Study.
2026
Head & neck
de Groot ECM, Dattilo LW, Nyirjesy SC, Park AS, Mohsen-Breen R +6 more
Plain English Surgeons reconstructing head and neck cancer often take tissue from patients' legs to use as grafts, but this creates damage at the donor site on the leg. Researchers compared how well patients recovered from three different types of leg grafts (fibula, thigh, and calf) by measuring their leg function over a year using a standardized questionnaire.
Patients who received calf grafts recovered their leg function faster and had better mobility at one year than those who received thigh or fibula grafts. When choosing which type of graft to use, doctors should factor in how much damage each one causes to the leg, since the calf graft appears to cause the least long-term problems.
Incidence of HPV-independent second primary malignancies following treatment of HPV-associated malignancy.
2026
Oral oncology
Nyirjesy SC, Al-Inaya Y, Zhang S, Karadaghy OA, Lin DT +6 more
Plain English Researchers looked at patients who had already been treated for a type of throat cancer linked to HPV to see if they developed other types of head and neck cancers that were not connected to HPV. They found that about 2.5% of patients did develop these second cancers years later, often in different areas of the mouth or throat, and many had received radiation and chemotherapy for their first cancer. This is important because it shows that these new cancers can have different causes than the original one, suggesting that doctors should monitor these patients long-term and consider retesting for HPV.
Prognostic significance of hemorrhage requiring embolization in the setting of previously treated head and neck squamous cell carcinoma: Systematic review and retrospective cohort.
2025
Head & neck
Karadaghy OA, Peterson AM, Sawaf T, Renslo B, Miller B +8 more
Plain English This study looked at patients with head and neck cancer who had severe bleeding and needed a procedure called embolization to stop it. Out of 182 patients reviewed, about half were alive after one year, and for 51 patients analyzed in greater detail, the average survival after the bleeding event was just over 2 months, with some living as long as nearly 11.4 months; those still fighting cancer at the time of bleeding had even poorer outcomes.
Who this helps: This research primarily aids doctors in understanding the risks and survival chances for patients experiencing bleeding after treatment for head and neck cancer.
Impact of Margins on Outcomes in HPV-Related Oropharyngeal Squamous Cell Carcinoma Treated With Surgery Only.
2025
Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery
Karadaghy OA, Wu MP, Farrokhian N, Armache M, Samaha NL +8 more
Plain English This study looked at how the width of surgical margins affects the outcomes for patients with HPV-related throat cancer who were only treated with surgery. Researchers found that patients with margins less than 1 millimeter had a higher risk of their cancer coming back, with a recurrence rate of about 3.7 times greater than those with wider margins (1 millimeter or more). This matters because it indicates that the current standards for what counts as a “safe” margin may need to be updated specifically for HPV-positive cases to improve patient outcomes.
Who this helps: Patients with HPV-related throat cancer.
Plain English The study investigated the use of a special dye called Indocyanine Green (ICG) to help surgeons identify hidden cancers during robotic surgeries performed with the Da Vinci SP robot. Out of 19 patients with undiagnosed primary tumors, ICG helped pinpoint the primary tumor in 16 cases, which is about 84%. This is significant because it shows that ICG can effectively assist in locating difficult-to-find cancers during surgery, potentially improving patient outcomes without adding much complexity or risk.
Who this helps: This helps patients with unknown primary cancers.
Stomal Bleeding in a Laryngectomized Patient as a Consequence of an Infected Innominate Artery Stent: A Case Report.
2025
Head & neck
Sim ES, Karadaghy OA, Deschler DG
Plain English This study focused on a patient who experienced severe bleeding from her stoma (the opening created after a laryngectomy) more than 30 years after her throat surgery for thyroid cancer. Investigations revealed that the patient had a stent in her innominate artery that had become infected and was causing the bleeding, which was confirmed when doctors performed surgery to remove the infected stent and repair the stoma. After the surgery, the bleeding stopped, highlighting the importance of quickly addressing any stomal bleeding to prevent serious complications.
Who this helps: This information helps doctors treating laryngectomized patients by emphasizing the need to evaluate and address stomal bleeding immediately.
Single Stage Reconstruction of Composite Rhinectomy Defects Using Osteocutaneous Radial Forearm Free Flap.
2025
Head & neck
Karadaghy OA, Feng AL
Plain English Surgeons removed cancer from three patients' noses, leaving large defects that required reconstruction of skin, bone, and internal structures. They used a single surgical procedure to rebuild the nose by transplanting tissue from the patients' forearms, which contained skin, bone, and connective tissue all together. All three patients recovered successfully with good-looking, functioning noses and no major complications, avoiding the need for multiple surgeries that traditional approaches would have required.
Donor Site Morbidity of the Medial Sural Artery Perforator (MSAP) Free Flap for Head & Neck Reconstruction.
2025
Head & neck
Dattilo LW, de Groot ECM, Nyirjesy S, Karadaghy OA, Noyes E +5 more
Plain English Surgeons use skin and tissue from the calf (called an MSAP flap) to reconstruct damaged areas of the head and neck after cancer or injury. This study tracked 22 patients who received this surgery and tested their leg function over time using a standard mobility test.
Patients' leg function was significantly impaired immediately after surgery but steadily improved, reaching nearly normal levels within 6-12 months and fully recovering by one year.
This proves the surgery causes minimal lasting damage to the donor leg, making it a safe and effective choice for head and neck reconstruction.
Medial sural artery perforator flap in head & neck reconstruction.
2025
Current opinion in otolaryngology & head and neck surgery
Karadaghy OA, Feng AL
Plain English Doctors can now use a thin piece of tissue from the calf (called the medial sural artery perforator flap) to rebuild the head and neck after cancer surgery or injury, and it works better than older methods because it's thinner, causes less damage to the donor site, and produces better-looking results. Recent research has mapped out exactly where the blood vessels are in this flap, making the surgery more reliable and predictable. Compared to other tissue grafts, this flap leaves patients with fewer problems at the donation site and better function in areas like the mouth and throat.
Pott's puffy tumor in a 23-month-old: Youngest known case of a rare disease.
2022
Auris, nasus, larynx
Karadaghy OA, Lucas JC, Paroya S, Jensen D
Plain English This report discusses a 23-month-old boy who developed a rare condition called Pott's puffy tumor after recovering from influenza. He had swelling around his eye that worsened quickly and was found to have multiple sinus issues, including an abscess in his forehead. After urgent surgery and antibiotics, the boy fully recovered, making him the youngest known case of this serious complication related to sinus infections.
Who this helps: This information is valuable for doctors treating young children with sinus issues.
Machine Learning to Predict Treatment in Oropharyngeal Squamous Cell Carcinoma.
2022
ORL; journal for oto-rhino-laryngology and its related specialties
Karadaghy OA, Shew M, New J, Bur AM
Plain English This study explored how machine learning (ML) can predict treatments for patients with early-stage oropharyngeal cancer, specifically those classified as T1-2 and N0-N1. Among 19,111 patients analyzed, surgery and radiation were used equally, with both capturing about 50% of the treatments. The ML model developed achieved a prediction accuracy of 71%, showing that factors like tumor characteristics and the treatment center's type influence treatment decisions across the country.
Who this helps: This helps doctors and healthcare providers in making more informed treatment choices for oropharyngeal cancer patients.
Plain English This study looked at how effective a surgical method called intracranial free tissue transfer is for repairing serious damage inside the skull. The researchers examined 11 patients who had a total of 13 of these surgeries, finding that while most repairs were successful, 3 patients needed extra surgeries for issues like fluid leaks. This approach is important because it helps doctors safely close openings in the skull caused by tumors, injuries, or infections.
Who this helps: This helps patients with severe skull injuries or conditions that require complex reconstruction.
Microsurgical Management of Early Onset Alveolar Soft Part Sarcoma of the Oral Tongue: Case Report and Review of the Literature.
2022
The Annals of otology, rhinology, and laryngology
Lucas JC, Karadaghy OA, Andrews B, Friedman E, Kakarala K +2 more
Plain English This study focuses on a rare type of tumor called alveolar soft part sarcoma, which usually affects older teens and young adults, but in this case, was found in a 16-month-old boy. The tumor was removed through surgery, and the area was repaired using skin and tissue from another part of his arm. Four years after the surgery, the child is still free of the disease, marking him as the youngest known case of this type of cancer.
Who this helps: This information helps doctors treating young patients with rare tumors.
Creation of a Novel Preoperative Imaging Review Acronym to Aid in Revision Endoscopic Sinus Surgery.
2022
Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery
Karadaghy OA, Peterson AM, Fox M, White J, Bhalla V +3 more
Plain English This research examined the anatomical problems that can lead to ongoing sinus issues, requiring a second surgery called revision endoscopic sinus surgery (RESS). The study analyzed 599 articles, finding that specific areas in the sinuses, particularly the anterior and posterior ethmoid cells, are common sources of these problems. To help doctors prepare for surgery, the researchers created a handy acronym, REVISIONS, which highlights key areas to focus on during imaging, aiming to improve surgery outcomes and reduce complications.
Who this helps: This benefits patients undergoing sinus surgery and their doctors.
Rates of bone reabsorption and union in mandibular reconstruction using the osteocutaneous radial forearm free flap.
2022
Head & neck
Karadaghy OA, Mussatto CC, Schatz BA, Li J, Norris TW +10 more
Plain English This study looked at how well a specific surgical method, called the osteocutaneous radial forearm free flap (OCRFFF), works for rebuilding the lower jaw (mandible) in patients. The research involved 121 patients and found that there was no significant loss of bone volume after the reconstruction, meaning the bone stayed stable over time. Additionally, patients who didn't receive extra treatments and had more time after surgery were more likely to have their bones heal completely. This matters because it shows that the OCRFFF is a reliable option for surgery in the head and neck area.
Who this helps: Patients needing reconstruction after surgery or injury to the jaw.
Machine learning directed sentinel lymph node biopsy in cutaneous head and neck melanoma.
2022
Head & neck
Oliver JR, Karadaghy OA, Fassas SN, Arambula Z, Bur AM
Plain English This study looked at ways to improve the accuracy of a procedure called sentinel lymph node biopsy (SLNB) for patients with skin cancer on the head and neck. Researchers created machine learning tools that were able to identify patients at very low risk for cancer spread, showing that these tools performed better than current guidelines: specifically, the best machine learning method had a specificity of 30.1% compared to just 7.1% using standard guidelines, while still detecting over 97% of actual cases. This is important because it could help prevent unnecessary surgeries for many patients who do not have cancer spread.
Who this helps: This helps patients with head and neck melanoma who may avoid unnecessary procedures.
Evaluation of the literature surrounding shared decision-making in elective rhinological surgery: A scoping review.
2021
Auris, nasus, larynx
Karadaghy OA, Vukas RR, Villwock JA
Plain English This research paper looked at how shared decision-making (SDM) is used in treating chronic rhinosinusitis (CRS), a condition that affects the sinuses. Out of 416 articles that were reviewed, only one discussed SDM in detail, highlighting a significant gap in existing research on this topic. This is important because involving patients in decisions about their surgery could improve their care and outcomes.
Who this helps: This benefits patients with chronic rhinosinusitis and their healthcare providers.
Predicting salvage laryngectomy in patients treated with primary nonsurgical therapy for laryngeal squamous cell carcinoma using machine learning.
2020
Head & neck
Smith JB, Shew M, Karadaghy OA, Nallani R, Sykes KJ +3 more
Plain English Researchers studied patients with early-stage laryngeal cancer who received non-surgical treatments like radiation and chemotherapy to see if machine learning could predict who would need a second surgery called salvage total laryngectomy (STL). They analyzed data from over 16,400 patients, finding that a specific machine learning model could accurately predict STL needs 76% of the time. This is important because it helps doctors identify which patients may need more intensive care earlier, potentially improving outcomes and treatment strategies.
Who this helps: This benefits patients with laryngeal cancer and their doctors.
Development and Assessment of a Machine Learning Model to Help Predict Survival Among Patients With Oral Squamous Cell Carcinoma.
2019
JAMA otolaryngology-- head & neck surgery
Karadaghy OA, Shew M, New J, Bur AM
Plain English This study focused on creating a machine learning model to better predict how long patients with oral squamous cell carcinoma are likely to survive. Researchers analyzed data from over 33,000 patients and found that 50.6% had died within five years. The machine learning model had an accuracy of 71% and performed better than the traditional TNM staging system, which had an accuracy of 65%.
Who this helps: This benefits patients by providing more accurate survival predictions, allowing for better treatment planning.
Survival for HPV-positive oropharyngeal squamous cell carcinoma with surgical versus non-surgical treatment approach: A systematic review and meta-analysis.
2018
Oral oncology
Sinha P, Karadaghy OA, Doering MM, Tuuli MG, Jackson RS +1 more
Plain English This study looked at whether surgery or non-surgical treatments are better for patients with HPV-positive throat cancer. The researchers found that the death rates were lower for those who had surgery (15%) compared to those who did not have surgery (20%), but overall survival rates between the two treatment approaches were not significantly different. This matters because it helps guide treatment decisions for patients with this type of cancer and highlights the need for more high-quality research on the best options.
Who this helps: Patients with HPV-positive throat cancer.
Development of a New Clinical Severity Staging System for Patients With Nonmetastatic Papillary Thyroid Carcinoma.
2017
JAMA otolaryngology-- head & neck surgery
Karadaghy OA, Kallogjeri D, Piccirillo JF
Plain English This study created new ways to stage nonmetastatic papillary thyroid cancer (PTC) by considering not just tumor characteristics but also patient features like age and health conditions. Researchers looked at data from 774 patients and found a 90% survival rate over five years; survival rates varied significantly by the new staging categories: 95% for stage A, 74% for stage B, and 58% for stage C. This improved staging system can help doctors better predict patient outcomes and guide treatment decisions.
Who this helps: Patients with nonmetastatic PTC and their healthcare providers.
Reporting of Effect Size and Confidence Intervals in JAMA Otolaryngology-Head & Neck Surgery.
2017
JAMA otolaryngology-- head & neck surgery
Karadaghy OA, Hong H, Scott-Wittenborn N, Sinha P, Suko J +4 more
Plain English This research examined how often medical studies in a specific journal reported effect sizes and confidence intervals, which help readers understand the significance of the results. Out of 107 studies reviewed, only 58 (about 54%) reported an effect size, and just 29 (27%) included confidence intervals. This matters because clearer reporting would help doctors and patients better understand study results and make more informed decisions about treatment.
Who this helps: Patients and doctors.
A methodological assessment of studies that use voxel-based morphometry to study neural changes in tinnitus patients.
2017
Hearing research
Scott-Wittenborn N, Karadaghy OA, Piccirillo JF, Peelle JE
Plain English This research looked at various studies that used brain imaging technology to understand changes in the brains of people with tinnitus, a condition that causes ringing in the ears. The review analyzed 13 different studies and found that they produced mixed and sometimes conflicting results due to differences in how the studies were designed and conducted. The findings matter because understanding these variations can help improve future research methods, leading to better insights into tinnitus and potential treatments.
Who this helps: This helps researchers and healthcare providers working with tinnitus patients.
Andrés M Bur Allen L Feng Jeremy D Richmon Derrick T Lin Mark A Varvares Matthew Shew Jay F Piccirillo Emilie C M de Groot Lillian W Dattilo Sarah C Nyirjesy
Physician data sourced from the
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Plain-English summaries generated by AI.
Not medical advice.