Assessment of Safety of Air Travel in Patients With Pulmonary Langerhans Cell Histiocytosis

Completed

Brief Summary: The aim of this study is to conduct survey-based assessments for the safety of air travel in patients with pulmonary Langerhans cell histiocytosis (PLCH). The study will enroll patients through the clinic network at Rare Lung Disease Consortium (RLDC) and through the Histiocytosis Association website. Patients will have access to the questionnaire via REDCap (an online data management system) and each patient will be provided with a link to complete the survey. The investigators plan on enrolling approximately 200 patients with PLCH for the purpose of this study. Secondary aims of this study include further characterization of the clinical aspects of disease and to establish a contact registry for these patients, in order to facilitate future studies.

Detailed Description: The study will enroll participants through the clinic network at the Rare Lung Disease Consortium (RLDC) and through the Histiocytosis Association websites. Participants will have access to the questionnaire via REDCap (an online data management system) and each participant will be provided a link to complete the survey. In case of lack of internet access or inability to complete the online questionnaire, a paper survey will be mailed out with a pre-paid envelope to return the survey.

Primary Study Objective(s):

To define the risk of pneumothorax associated with air travel in patients with PLCH.

Secondary Study Objective(s):

To establish a contact registry for patients with PLCH to facilitate future trials To assess the rate of pneumothorax recurrence in patients with PLCH To assess the efficacy of pleurodesis in preventing recurrent pneumothoraces among patients with PLCH

Recruitment & Eligibility

Inclusion Criteria

Adult, age 18 or older
English literate
Signed, dated informed consent; either given electronically or via paper form
Confirmed diagnosis of PLCH based either on characteristic radiologic findings, or histopathological confirmation

Exclusion Criteria

Primary Outcome Measures

Name	Time	Method
Number of Participants With PLCH Who Experienced Spontaneous Pneumothorax During or Within 24 Hours Following Air Travel	During air travel or within 24 hours following air travel	The investigators will measure the number of pneumothoraces that occur either during air travel, or within 24 hours of air travel among patients with pulmonary Langerhans cell histiocytosis. The incidence of air travel related pneumothorax will be calculated by dividing the number of pneumothoraces to the total number of flights undertaken by the entire cohort.

Secondary Outcome Measures

Name	Time	Method
Number of Patients With Pulmonary Langerhans Cell Histiocytosis Who Experienced a Spontaneous Pneumothorax	2 years and 6 months	The investigators will catalogue the number of spontaneous pneumothoraces experienced by patients with pulmonary Langerhans cell histiocytosis.
Number of Patients With Pulmonary Langerhans Cell Histiocytosis Who Experienced Recurrent Pneumothorax	2 years and 6 months	The investigators will measure the number of participants who experience a recurrent spontaneous pneumothorax.