ClinicalTrials.gg
SuspendedNCT03269396Updated Jul 22, 2026

Laryngeal Allograft Transplantation

An interventional study of Larynx Allograft Transplantation in Larynx Stenosis, Larynx Disease and Laryngectomy, sponsored by Mayo Clinic. Suspended at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-07-22.

Sponsored by Mayo Clinic · Not applicable, Interventional, and Treatment

Why this study was suspended
Protocol revision

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Phase
Not applicable
Study type
Interventional
Enrollment
10
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 72 studies in Laryngeal Diseases with a site in United States — 15 open to participants now, 17 under way, 3 of them phase 3. Laryngeal Diseases · United States.

Planned enrollment
53rd of 61
10 · median 46
Started
2023
with 1 other
No phase
16 of 72
4 open now
Registered
44th of 72
by date
Lead sponsor
2 of 72
Mayo Clinic

Among the 72 studies in Laryngeal Diseases with a site in United States, this one is the 53rd largest by planned enrollment of the 61 interventional ones that give a count, is one of 2 that started in 2023, is one of 16 with no phase, and was the 44th registered.

Laryngeal Diseases

147 studies on the registry are indexed under Laryngeal Diseases; 26 are open to participants now.

Browse Laryngeal Diseases studies →

Open to participants now

15 of the 72 studies in Laryngeal Diseases with a site in United States are open now. Recruiting first, the newest first:

10 more — sign in →

All 15 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 21 Laryngeal Diseases studies recruiting now, 17 (81%) set no upper age limit and 1 (5%) stops at 75 or younger; 3 take children under 18; 2 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

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02

Study summary

The purpose of this proposed study is to obtain safety and efficacy data on human laryngeal allograft transplantation in an effort to safely use these procedures as a viable reconstructive option for patients with severe laryngeal or laryngotracheal incompetence.

Read the detailed description

Patients with severe laryngeal or laryngotracheal incompetence without other reconstructive options will be considered for cadaveric laryngotracheal transplantation. Data will be collected from 10 patients and will include length of hospital stay, short-term complications, long-term complications, hospital readmission, return trips to the operating room (OR), rejection episodes and severity, swallowing function, ability to have tracheotomy tube decannulated, voice parameters, pulmonary function, development of anti-donor antibodies, and quality of life scores.

03

Conditions studied

  • Larynx Stenosis
  • Larynx Disease
  • Laryngectomy
  • Larynx
  • Larynx Fracture

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Keywords

  • severe laryngotracheal dysfunction
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Potential subjects for this study include patients with severe laryngeal dysfunction or a previous laryngectomy. For the purposes of this study, severe laryngeal dysfunction is defined as the loss of normal laryngeal function resulting in significant dysphonia, dysphagia, or dyspnea.

Inclusion criteria

Inclusion Criteria:

  • Ages 18 years and older
  • Male or Female
  • One of the following:

    • Severe laryngeal dysfunction as described above
    • Laryngeal stenosis
    • 5 years or longer s/p definitive management for head and neck cancer
    • Laryngeal cancer requiring total laryngectomy in a patient already on
    • Low-grade chondrosarcoma requiring total laryngectomy
  • Ability to obtain from the patient

Exclusion criteria

Exclusion Criteria:

Poor surgical candidacy secondary to poor physical/mental health as determined by a pre-operative medical evaluation

General medical status

  • Pregnancy
  • Any systemic disease which would alter

    • Active neoplastic disease, not considered yet to be cured (Exceptional cases will be considered in case by case discussion)Less than 5 years s/p definitive management for cancer
    • Cancer within the last 5 years (Exceptional cases will be considered in case by case discussion)
    • Obesity ( >29 - 30)(Exceptional cases will be considered on a case by case basis)
    • Cachexia (BMI\<18)(Exceptional cases will be considered on a case by case basis) Significant renal dysfunction ( \< 50 ml/min.)
    • Significant hepatic dysfunction
    • Significant kidney damage
    • Unmanageable infections
    • Unable to participate in preoperative exercise training
    • Unable to be weaned to equal or less than 10 mg/day of
    • Untreatable cardiac disease
    • Active neuromuscular disease
    • History of recurrent aspiration or active, unmanageable Gastro-Esophageal Reflux
    • Patients with active connective tissue diseases (exceptions to be considered in a case by case basis)
    • Patients unable to achieve > 600 feet in a 6 minute walk test (exceptions to be considered in a case by case basis)
    • Patients considered having active immunodeficiency disorders (exceptions to be considered in a case by case basis)
    • Multiple co-morbidities that would make transplantation prohibitively risky
  • Psychosocial parameters

    • Severe mental retardation, psychosis, depression or organic brain syndrome
    • Uncontrolled diabetes mellitus. Once \< 7, reevaluate for candidacy.
    • Active substance use within 6 months
    • Active smoking within 6 months
    • Active alcoholism within 6 months
    • Inability to comply with transplant-related management and medical follow-up
    • Any other circumstances that deem the candidate high risk from a psychosocial perspective
Terms in these criteria, in plain language(7)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Creatinine clearance (CrCl)

How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
10 participants (estimated)

Study arms

  • Experimental
    Larynx Allograft Transplantation

    Cadaveric laryngotracheal transplantation

    Procedure: Larynx Allograft Transplantation

Interventions

  • ProcedureLarynx Allograft Transplantation

    This study is a prospective clinical trial designed to assess the efficacy and safety of laryngeal transplantation. A total of 10 patients will be enrolled over a five-year timeframe. Study length is 5 years.

06

What researchers measure

Primary outcomes

  1. Survival of the allograft at the one-year visit.

    Survival of the allograft as indicated by histological rejection grading.

    Time frame: 1 year

Secondary outcomes

  1. Swallowing without aspiration at the one-year visit.

    Time frame: 1 year

  2. Voice Evaluation

    Standard voice evaluation will include voice recordings, acoustic and aerodynamic measurements as compared to baseline measurements.

    Time frame: 1 year

  3. Pulmonary function

    Pulmonary function values within normal range.

    Time frame: 1 year

  4. Ability to have tracheotomy tube decannulated

    Ability to have tracheotomy tube decannulated after successful capping trials.

    Time frame: 1 year

07

Study locations

1 site
  • Mayo Clinic in Arizona
    Phoenix, Arizona 85054, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started May 2023 (actual). Primary completion is estimated for May 2028, 60 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 7, 2017
First posted
Aug 31, 2017
StartActual
May 19, 2023
Primary completionEst.
May 2028
CompletionEst.
May 2033
Last update
Jul 22, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jul 22, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03269396
Lead sponsor
Mayo Clinic
Responsible party
David G. Lott, M.D. (Consultant-Department of Otolaryngology Head & Neck Surgery/Audiology, Mayo Clinic) — Principal investigator
First posted
Aug 31, 2017
Start date
May 19, 2023
Primary completion
May 2028 (estimated)
Completion
May 2033 (estimated)
Last update
Jul 22, 2026

Study contacts

David G Lott, MD
principal investigator · Mayo Clinic

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is suspended, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.

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Discussion

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