Abbreviation
ECD: Erdheim-Chest Disease; FSH: Follicular stimulating hormone; LCH:
Langerhans cell histiocytosis; LH: Leutinizing hormone; INF-α:
Interferon-alpha; MEK inhibitor: MAPK/ERK (Mitogen-activated protein
kinase/extracellular signal regulated kinase) kinase inhibitor; PET/CT:
Positron emission tomography/computed tomography; HsTSH: High
sensitivity thyroid stimulating hormone.