Dr. Perry Mansfield | Skull Base/Head and Neck Surgery

Senta Clinic

3590 Camino Del Rio N
Suite 100
San Diego, CA 92108

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Latest in Head and Neck Surgery

Tumor Analysis and Surgical Planning

Dr. Mansfield teaching his students tumor analysis and surgical planning in advance of any surgery hours of time go into careful planning the surgery.

Fellowship diploma to Oculoplastic surgeon Dr. Raul Hernandez Rubio.

Congratulations Dr. Hernandez Rubio on your journey to lead the oculoplastic surgery team in Ft. Myers Florida.

Sleep Apnea Clinical Study

Dr. Mansfield is honored to be the Principle Investigator for a novel sleep apnea clinical trial.

Dr. Mansfield recognized nationally, once again by the prestigious Castle Connoly awards as a National top doctor. Congratulations to Dr. Mansfield on his consistent excellence in patient care and service.

Top Doctor

Dr. Mansfield voted top doctor by his peers. This is the 16th year in a row that Dr. Mansfield has received this honor.

Define Your Career

Define your career by the passion you feel in your heart. Its reward is endless and found in the hearts of others you touch.

Heartfelt note from a student to Dr. Mansfield.

Legacy

Dr. Mansfield has mentored dozens of health care professionals. He continues to teach his students leaving a humble long-term legacy of excellence.

Surgical Robot

Dr. Mansfield and his team working with a novel surgical Robot operating with virtual reality 4k headsets. He is wearing the first HD VR made for this application. He is continuing to push the envelope of medical technology and innovation.

Congratulations Dr. Mansfield!

Dr. Mansfield selected 16 times by his peers as top Otolaryngologist, Head and Neck Surgeon in San Diego County. Congratulations Dr. Mansfield!

Congratulations to Dr. Christina Douglas

Completing the Senta Clinic Fellowship in Oculoplastic Surgery and Neuro -ophthalmology under the direction of Dr. Kimberly Cockerham. Tennessee should be proud to have you in their faculty.

Neuromuscular Function in Sleep Apnea

Dr Mansfield's innovations in Sleep apnea highlighted by the American Academy of Sleep Medicine in their monthly published insights.

Dr Mansfield Top Doctor Award from CastleConnolly.com

"Top Doctor" in Otolaryngology

Castle Connolly selects Dr. Mansfield as "Top Doctor" in Otolaryngology once again in 2023.

Doctor hands using a computer with high tech graphics

Sleep Technology Highlighted

Dr. Mansfield and his team have multiple patents filed in multiple countries and issued technology in sleep apnea diagnosis and treatment.

A group of people viewing art on display at a museum.

Senta Clinic Staircase Highlighted at the Bahaus Art Museum

Senta Clinic Staircase highlighted at the 100th Anniversary of the Bahaus Art Museum in Germany.

A group of sitting people watching a person blurred out in the forground giving a presentation.

Dr. Perry Mansfield Will Be the Keynote Speaker at the QED Luncheon

Dr. Perry Mansfield is honored to be the Keynote Speaker at the QED Luncheon on January 10th at La Jolla Country Club.

Dr. Cindy Ocran Completes Her Fellowship Training

Dr. Mansfield is honored to present the Senta Clinic Fellowship certificate to Dr. Cindy Ocran in Neuro-ophthalmology and Oculoplastic surgery.

Dr. Mansfield talking to a group of people

Dr. Mansfield honored to present the Senta Clinic Fellowship Certificate

Dr. Mansfield honored to present the Senta Clinic Fellowship Certificate of completion to Opthalmologist and Oculoplastic surgeon.

America's Most Honored Doctors

Dr. Mansfield selected as one of the most honored doctors once again.

Close up of half of a young woman's face focusing on the eye.

Thyroid Eye Disease Clinical Trials

Senta Clinic is pleased to expand our clinical trial program with thyroid disease clinical research trials.

Female hands holding elderly male hands, care concept.

Cancer Treated, Lifelong Connections Formed

“With news as overwhelming as this, Dr. Mansfield immediately helped me feel at ease and connected me to a team of experts at Sharp…”

Front of Senta Clinic Building Bathed in Lights of Ukrainian Flag

Senta Clinic Stands with Ukraine

In solidarity we stand.

Dr. Mansfield Involved in the Development of First Neuroscience Hospital in Southern California

East County medical center plans to dedicate 50 beds for brain-related care from cancer to stroke.

Congratulations! Dr. Perry T. Mansfield Castle Connolly Top Doctor for 2022

We are honored to announce that Dr. Perry T. Mansfield has been named a Castle Connolly Top Doctor for 2022!

Cover of Muscle & Nerve Vol 65/No. 3, March 2022

Pilot study of a novel transmembranous electromyography device

I would like to thank my biotech partner Dr. Nelson Powell and the great minds and believers, in helping to develop this novel technology for neurodiagnostic analysis.

Patient Dedication

Dr. Mansfield received a dedication in a recent broadcast, congratulating him on the recent birth of his grandson.

Proud to support Sharp Neuroscience Hospital

Dr. Mansfield is Proud to Support the New Sharp Neuroscience Hospital

Dr. Mansfield is proud to support the new Sharp Neuroscience Hospital.

Top Doctor in Otolaryngology, Head and Neck Surgery in San Diego Magazine

Dr. Mansfield selected 15 years in a row by his peers as a Top Doctor in Otolaryngology, Head and neck Surgery.

Team Members celebrate Roberts completed internship.

Congratulations to My Student Robert for Completing His Summer Internship

Congratulations to my student Robert for completing his summer internship, with a novel article for publication.

Friend of the Foundation Perry Mansfield Lifetime Member Card

Celebrating the Retirement of a Wonderful and Kind Member of My Team after 14 Years

We wish her the very best enjoying her grandchildren.

Dr. Mansfield Honored as a Lifetime Member of the Sharp Foundation

Dr. Mansfield honored as a lifetime member of the Sharp Foundation for philanthropic support in patient care.

Dr. Mansfield Honored His 12th Year as Chairman

Dr. Mansfield honored to continue in his 12th year as Chairman of the Prewitt Foundation.

Top view image of group of young people putting their hands together. Friends with stack of hands showing unity.

Dr. Kimberly Cocherham Joins the Team

Dr. Mansfield honored to announce Internationally acclaimed Neuro-ophthalmologist / Ocular Oncologist and Oculoplastic Surgeon joins his team.

Dr Perry Mansfield and Retired Detroit Chief of Police and Governor Candidate James Craig

Dr. Mansfield Joins Retired Detroit Chief of Police and Governor Candidate James Craig

Chief Craig is one of the most accomplished police chiefs serving his community since 1977.

Congressman Burgess Owens and Dr. Mansfield

Congressman Burgess Owens Lends His Superbowl Ring to Dr. Mansfield for a Moment Together

Great conversation about healthcare delivery.

Castle Connolly Top Doctor in 2021 Award for Perry Mansfield, MD

Dr. Perry Mansfield selected by the prestigious Castle Connolly as a Top Doctor in 2021

Dr. Perry Mansfield selected once again by the prestigious Castle Connolly as a Top Doctor in 2021.

Dr. Mansfield Selected By His Peers 15 Years in a Row as a Top Doctor

Dr. Perry Mansfield working with team in Chicago

Dr. Mansfield Working With Innovation Team in Chicago

Dr. Mansfield working as part of an innovation team in Chicago.

Dr. Perry Mansfield and Governor Ron DeSantis

Dr. Mansfield Meets with Governor Ron DeSantis

Dr. Mansfield Meets with Governor Ron DeSantis to speak about healthcare.

Castle Connely Award for Top Doctor

Dr. Mansfield has been honored with the prestigious Castle Connely award.

Discussing Optimal Sleep Diagnosis

Dr Perry Mansfield featured discussing optimal sleep diagnosis and therapies.

America's Most Honored Doctors

Dr. Mansfield celebrated among America's most honored doctors.

Dr. Perry Mansfield and Congressman Dan Crenshaw

Dr. Perry Mansfield meets Congressman Dan Crenshaw

I had the privilege to join Congressman Dan Crenshaw, former United States Navy SEAL officer.

San Diego Magazine featuring Dr. Perry Mansfield

Dr. Perry Mansfield selected as a Top Doctor

Dr. Perry Mansfield selected 15 years in a row as a top doctor in Otolaryngology, Head and Neck Surgery.

Dr. Perry Mansfield, Congressman Mike Garcia, and Governor candidate John Cox

Discussions Regarding Healthcare Challenges

Dr. Mansfield discussing California's Healthcare challenges.

Dr. Mansfield Rated One of Best ENT Doctors in San Diego

Dr. Perry Mansfield, for his outstanding work, has been rated one of best ENT doctors by several news outlets.

Dr. Mansfield Receives Several Guardian Angel Awards for Patient Service

Thank you for inspiring generosity to our organization and exemplifying the Sharp Experience.

Dr. Perry Mansfield in full surgical gear for operating on COVID patients

Farewell to a Friend

After 41 years of Service to Sharp healthcare, my friend and operating room nurse retired.

The Toughest Time in My Life as a Surgeon

As I operate in a respirator on a Covid patient my surgical team faces such personal risk.

California Legislature Letter from Assemblywoman Lorena Gonzalez

California Legislature Congratulates Dr. Mansfield

California legislature congratulates Dr. Mansfield for his innovation, leadership and compassionate service.

State of the Art Testing

One of the first in the state of California, Dr. Mansfield's team provides state of the art immunologic and nasal corona virus testing ...

Respirator for a Cancer Surgery

Dr. Mansfield dons a respirator for a cancer surgery to protect the healthcare team from the ravages of coronavirus.

During the COVID-19 Crisis

Our head and neck team has been fully equipped with PPE to handle any and all head, neck, sinus and tumor problems.

Dr. Perry Mansfield with Dr. Jason Toranto

Head and Neck Oncology Team News

Congratulations to Senta Clinic Chief of Plastic Surgery Dr. Jason Toranto for a tremendous data driven talk...

Dr. Mansfield Joins the Editorial Board of Acta Scientific

Dr. Perry Mansfield joins the prestigious editorial board of the International open-source journals of Acta Scientific.

Evaluating the Clinical, Medicolegal, and Economic Impact of Continuous Tracking of Multidisciplinary Skull Base Conference Disease and Patient Metrics

North American Skull Base Society National Meeting 2020

30th Annual NASBS National Meeting

Dr. Perry Mansfield presents 3754 tumor cases at the 30th Annual North American Skull Base Society national meeting.

Castle Connolly Top Doctors, The Official Source for Over 25 Years

Castle Connolly Top Doctors 2020

Dr. Perry Mansfield selected as a Castle Connolly Top Doctor for 2020. Congratulations!

Dr. Perry Mansfield with astronaut Leory Chiao

Legend of Flight Award

The board of directors of the San Diego Air and Space Museum are proud to present a Legend of Flight award to several aviation pioneers including Jeff Bezos.

Legendary Astronaut Leroy Chiao

Dr. Perry Mansfield with legendary astronaut Leroy Chiao, former commander of the Russian Soyuz rocket.

Dr. Mansfield in Front of San Diego Top Doctors Poster

Congratulations Dr. Mansfield

Congratulations to Dr. Mansfield, selected 14 years in a row as a top Otolaryngologist.

Group Picture of Senta Clinic Doctors with San Diego Top Doctors Sign

Congratulations Senta Clinic Doctors

Congratulations to so many Senta Clinic Doctors for receiving the Top Doctor Award.

Dr. Mansfield Giving Thumbs Up at ALS Walk for the Cure Event Booth

Supporting the ALS Walk for the Cure

Supporting the ALS walk for the cure. A devastating disease with no cure.

Professor Andres Gantous

Professor Andres Gantous visiting from the University of Toronto.

Senta Team Back for Top Doctors Gala

The Senta Team will be back for the Top Doctors Gala.

Dr. Perry with Alllison Nguyen and Riley Henderson, with their certificates of achievement.

Congratulations to Our Interns

Congratulations Allison Nguyen and Riley Henderson completing a summer internship with me at Senta Clinic.

Dr. Perry and Judith Mansfield with Apollo 11, Charlie Duke, and CEO James Kidrick.

Celebrating 50 Years of the Apollo 11 Moon Landing

Dr Perry Mansfield with Moon Walker and CAPCOMM of Apollo 11, Charlie Duke, and CEO James Kidrick.

Head and Neck Research Opportunity

Learn about a study for ALS patients to test a non-invasive device used to assess neuromuscular function in the mouth and throat.

Governor of Kentucky Matt Bevin

A special time with inspirational Governor of Kentucky Matt Bevin. Business friendly practical solutions.

Celebrity Brandon Straka

Dr Perry and Judith Mansfield with Celebrity Brandon Straka.

On-Time Doctor Award 2019

Dr. Mansfield Earns On-Time Doctor Award 2019

Signs & Symptoms of Thyroid Issues

Dr Perry Mansfield discussed Deborah Norville's diagnosis of thyroid cancer on CBS 8.

Watch Now →

Signs & Symptoms of Thyroid Issues

Dr. Perry Mansfield featured on CBS Channel 8, discussing thyroid cancer in light of "Inside Edition" Deborah Norville's cancer scare.

Watch Now →

Head and Neck Surgery Opportunity Available at Senta Clinic - San Diego

Senta's Growing! Dr. Perry Mansfield directing a National search for Head and Neck Oncologic/Microvascular surgeon.

Senator Cory Gardner and Dr. Perry Mansfield

Wonderful business and healthcare discussion.

Dr. Perry Mansfield Honored at the University of Toronto

Dr. Perry Mansfield honored at the University of Toronto Department of Head and Neck Surgery with the surgical graduating class of 1993.

Video Gaming: Dr. Mansfield authors one of the early pioneering abstracts in 3 dimensional endoscopic surgery

Head-Mounted Display: Surgical Informatics Portal of the Future

Dr. Mansfield Receives Patients' Choice Award 2019

Congratulations to Dr. Mansfield for receiving the Patient Choice award again.

Dr. Perry Mansfield wins Castle Connolly National Award 14 years in a row

2019 Castle Connolly National Award

Dr. Perry Mansfield selected for the 2019 Castle Connolly National Award as a Top Head and Neck Surgeon 14 years in a row.

Dr. Nazeer Khan with Dr. Perry Mansfield at Senta clinic

Dr. Nazeer Khan Visits Senta Clinic

Dr. Khan is training with Dr. Mansfield's surgical mentors and masters Drs. Pat Gullane and Ralph Gilbert.

Head and Neck Cancer Patients and Survivors Support Group

New Support Group for Head and Neck Cancer Patients and Survivors

Beginning January 2019. Creating a way for patients and survivors to connect, share stories and explore experiences in a safe environment.

Dr. Perry Mansfield with Coronado Mayor, City Council and Art Commission for Unveiling

Dr. Mansfield with Coronado Mayor, City Council and Art Commission

Dr. Perry Mansfield and his family with the Mayor of Coronado, City Council and Art Commission, unveiling a portrait of John D. Spreckels.

Dr. Mansfield named a Top Doctor in Otolaryngology

Dr. Mansfield named by his peers 13 years in a row by the San Diego County Medical Society and San Diego Magazine as a Top Doctor in Otolaryngology.

Dr. Mansfield with Former California Governor Pete Wilson and Governor Candidate John Cox

Identifying and Evaluating the Impact and Implications of Collaborative Multidisciplinary Care in Skull Base Treatment: Retrospective Analysis and Literary Review

The Evolving Role of Immunotherapy in Late-Stage Sinonasal Melanoma

Evaluating the emerging role of immunotherapy as primary modality of treatment or in combination with traditional therapies.

With Governor Candidate John Cox

Healthcare Conversation with Governor Candidate John Cox with Judith Mansfield. Finding solutions to provide affordable quality care for all in need.

Dr. Perry Mansfield with Joe Walsh

A special moment with Eagles Rock Icon and friend Joe Walsh.

Dr. Diviya Veluvolu

Wonderful and talented physician training with me from England. Wishing her great success in her medical journey.

Congratulations to Kate Liang

Congratulations to Kate Liang for completing a summer research internship with Dr. Mansfield at Senta Clinic.

Dr. Mansfield Receives Prestigious Castle Connolly National Award

Dr. Perry Mansfield named, once again, in the prestigious Castle Connolly National Award.

Congratulations to Allison Nguyen

Congratulations to Allison Nguyen, for completing a summer research internship and co-author of 3 papers to be presented.

Doctor Mansfield Named "Top Doctor" 13 Years in a Row

By the San Diego County Medical Society. An accolade achieved by only 17 physicians from all specialties in the entire region.

Dr. Dan Bradley Visits

Dr. Dan Bradley Head and Neck Cancer Surgeon in training from the famous London UK Royal Marsden Cancer Hospital visiting.

Coronadans Engaged In Their Community

An old adage says “Ask a busy person if you need help.”

Dr. Perry Mansfield and Judith Mansfield join Rear Admiral Paul D. Pearigan, Rear Admiral Yancy B. Lindsey, General William M. Jurney

Giving Support for Military Families

Dr. Perry Mansfield and Judith Mansfield to thank the USO for giving support for Military families.

Dr. Mansfield and Rear Admiral Paul D. Pearigan

In Support of the USO

Joining Rear Admiral Paul D. Pearigan in support of the United Services Organization.

Sponsors of the USO San Diego

Dr Mansfield and his family are Guardian of Independence Sponsors of the USO San Diego.

Healthcare Conversation with John Cox

Healthcare conversation with Governor candidate and fellow USO board of directors member John Cox.

Dr. Perry and Judith Mansfield with an oil painting of John D. Spreckels

Donation to the City of Coronado

Dr. Perry and Judith Mansfield donate to the City of Coronado an oil painting of John D. Spreckels.

Visiting Silicon Valley Verb Surgical

Dr. Perry Mansfield visits Silicon Valley Verb Surgical a joint venture between Google and Johnson and Johnson.

Dr. Perry and Judith Mansfield with Governor Ricketts

Dr. Perry Mansfield Joins Gov. Ricketts

Dr. Perry and Judith Mansfield join Governor Ricketts, small business advocate and pragmatic politician.

Senta Clinic team at NASBS 2018

Senta Clinic team participating in the NASBS annual scientific meeting.

Congratulations to Hannah and Kate

Their poster presentation was published at the NASBS meeting.

$600,000 Gift to NASBS Foundation

Dr. Mansfield is deeply honored to present $600,000 gift to inaugurate the NASBS Foundation.

Grand Opening at Air & Space Museum

Dr. Perry Mansfield cutting the ribbon for the opening of the Speed exhibit.

NASBS Annual Meeting 2018

Dr. Mansfield, MD is an organizing committee member and will be hosting multiple presentations in the upcoming Annual Meeting of the North American Skull Base Society

The era of a legend ends...

A very special moment with Professor Arun Gadre

A very special moment with a dear colleague Professor Arun Gadre at Senta Clinic.

Top Doctors by San Diego Magazine

Congratulations to Dr. Mansfield for being selected by his peers 12 years in a row as Top Doctor by San Diego Magazine, in Otolaryngology, Head and Neck Surgery.

A Special Thanks - Kate Liang

A special thanks to one of my students Kate Liang for completing a Summer Research Internship at Senta Clinic.

A Special Thanks - Hannah Goldman

A special thanks to one of my students Hannah Goldman for completing a Senior Internship at Senta Clinic.

The 7 Minute Parathyroidectomy

When I first began parathyroid surgery hours were spent searching for the elusive tumor.

Dr. Perry Mansfield named "Top Otolaryngologist"

Castle Connolly names Dr. Perry Mansfield as "Top Otolaryngologist" once again.

Family. Home. Country.

SENTA Clinic is proud to support the San Diego USO.

USO Gala in San Diego on May 20

An event in San Diego on May 20 honored and supported active duty military and veterans.

2016 Vitals Patients' Choice Award

Congratulations to Dr. Perry Mansfield for winning the 2016 Vitals Patients' Choice Award, which recognizes him as a top-performing physician!

12-year Retrospective Analysis of 2,993 Consecutive Skull Base Cases

A 12-year retrospective and ongoing series of multidisciplinary skull base case presentations...

Effect of Continuous Left Ventricular Assist Device Blood Flow in a Free Flap

A patient with radiation failure squamous cell carcinoma of the right temporal bone...

Professor of Sleep Surgery - Dr. Nelson Powell

An afternoon of conversation with Pioneer, Innovator, Teacher...

NASBS International Skull base meeting February 2018

San Diego will host the NASBS International skull base surgery meeting February 2018...

Spending the day with Professor and Chief Chris Holsinger

A special thanks to Stanford Professor and Chief Chris Holsinger for...

Effect of Continuous Left Ventricular Assist Device Blood Flow in a Free Flap

In this case report, a patient with a history of squamous cell carcinoma of the right ear...

Congratulations to the surgical team for the acceptance of the abstract...

A 12-year retrospective and ongoing series of skull base case presentations...

Honored to Have Been Invited

Honored to have been invited as the Grand Rounds speaker at the University of Toronto.

Keynote Grand Rounds Speaker

Dr. Perry Mansfield has been invited as a keynote Grand Rounds Speaker for the University of Toronto Department of Head and Neck Surgery.

Physician of Exceptional Excellence

Once again Dr. Perry Mansfield has by named by the San Diego County Medical Society (SDCMS), working collaboratively with San Diego Magazine as one of the top doctors in 2016.

Tony Gwynn's Battle with Cancer

We remember Tony Gwynn's feats on the baseball field, his boundless love of San Diego, and in those last innings, he was a hero once more in his battle to beat cancer.

Coping with a Sinus Headache

Sinus headaches interfere with your ability to function. They can be caused by allergies, colds or structural problems in the nose or sinus cavities.

When Your Partner Has a Sleep Disorder

When your partner has a sleep disorder, it's a good bet he or she is not the only one missing out on a good night's rest.

Side Effects of Chemotherapy

Chemotherapy for head and neck cancer is used in conjunction with supportive care for most patients with metastatic or advanced recurrent head and neck cancer.

A Disorder So Bad You Can't Taste or Smell It

It's only sensible that we rely on our senses for a variety of reasons, many of which include our health and safety.

Doctors Warn of Apnea in Life Support Case

Case of Oakland girl left near death after routine tonsillectomy underlines need for caution.

Dr. Mansfield's Qualifications

Certification: American Board of Otolaryngology
Head And Neck Surgery
Canadian Board of Otolaryngology
Head and Neck Surgery
Fellow of The Royal College of Physicians and Surgeons

Medical License: Medical Board of California

Hospital Affiliations: Sharp Memorial, San Diego
Sharp-Grossmont, La Mesa
Scripps Memorial Hospital, La Jolla

Professional Appointments and Positions: Director of Skull Base Surgery and Head and Neck Oncology - Senta Clinic
Chief - San Diego Regional Head and Neck Center
Chairman - Steven Prewitt Skull Base Disease Foundation

Dr. Mansfield's Specialities

Head & Neck Tumor Surgery

Tumors – Advance H/N Tumors, Temporal Bone Tumors, Schwannomas, Pituitary Tumors, Paranasal Sinus Neoplasms, Orbital Tumors, Neurofibromas, Meningiomas

Endoscopic Sinus/Skull Base Surgery

Endoscopic surgery of the nose and paranasal sinuses is a sophisticated method of treating sinus diseases. Specifically, it consists of performing surgery with endoscopes similar to the arthoscopes that are used in orthopedic surgery of the knee and other joints, thereby allowing greater visibility inside the sinuses.

Thyroid/Parathyroid Surgery

Minimally Invasive Parathyroid surgery When surgical treatment of parathyroid disease is indicated, the abnormal tissue is identified before surgery using a combination of ultrasound, CT scans or Sestamibi scans. A small midline incision is carried out and the abnormal gland is removed.

Sleep Apnea Surgery

Sleep apnea is diagnosed through a physical examination with particular emphasis on weight, blood pressure and airway constriction in the nose, throat and lungs. In many cases, a sleep test will be recommended at a sleep laboratory.

Minimal Invasive Surgery

Dr. Perry Mansfield utilizes several advanced technologies to treat conditions of the head and neck. Including the following: 3D Sleep Apnea Protocol TORS Cyberknife Plasma Blade 3D Endoscopy Sinus Balloons/Stents TOLMS

Learn More About Dr. Mansfield's Areas of Expertise →

Senta Clinic Announcements

Dr. Mansfield is Thrilled that Dr. Kimberly Cockerham has Joined the SENTA Clinic ENT Team

Congratulations to SENTA Clinic's San Diego Magazine 2021 Top Docs

Perry T Mansfield, MD
Brianna Noelani Harris, MD
Michael J O'Leary, MD
Monali Sarjan Patel, MD
Ian Purcell, MD
Brian Hunter Weeks, MD

Prewitt Foundation Gets a New Logo

"NeuroScience Acceleration" – SENTA Clinic physicians, Dr Perry Mansfield and Dr. Michael O'Leary are proud to give back through the non-profit organization that serves as a resource for patients, families, survivors and medical professionals specific to diseases of the head and neck.