Table 1.

Clinical and pathologic characteristics of the 13 included lesions

Case	Sex	Age (years)	Presentation	Location	HMGA2 staining	Remark
1	M	61	Smooth endobronchial lesion.	Right upper lobe	POSITIVE
2	M	65	ENT carcinoma. Hemoptysis. Suspicious endobronchial lesion.	Right upper lobe	POSITIVE
3	M	50	Hemoptysis. Small sessile endobronchial lesion.	Left lower lobe	POSITIVE
4	M	55	COPD and obesity. Acute pulmonary insufficiency. Non suspicious endobronchial lesion.	Right lower lobe	NEGATIVE	Superficial epithelial cells were stained.
5	M	55	COPD and obesity. Acute pulmonary insufficiency. Non suspicious endobronchial lesion.	Left upper lobe	NEGATIVE	Superficial epithelial cells were stained.
6	M	58	Small cell neuroendocrine carcinoma. Endoscopic evaluation after 6 courses of chemotherapy.	Left lower lobe	NEGATIVE
7	M	64	Squamous cell carcinoma of the left upper lobe. Lipomatous endobronchial lesion.	Middle lobe	POSITIVE	Superficial epithelial cells were stained.
8	F	44	Ankylosing spondylarthritis. Dyspnea. Small non suspicious endobronchial lesion.	Trachea	NEGATIVE	Superficial epithelial cells were stained.
9	F	77	Smooth pediculated endobronchial lesion. Fat density on imaging.	Left lower lobe	NEGATIVE	Superficial epithelial cells were stained.
10	M	43	Endobronchial lesion.	Left upper lobe	POSITIVE
11	M	77	Pediculated endobronchial lesion causing complete bronchial obstruction. Calcification on imaging. Adipose lesion macroscopically.	Right upper lobe	POSITIVE
12	F	9	Localized bronchiectasis. Round whitish lesion causing complete bronchial obstruction.	Left lower lobe	NEGATIVE
13	M	76	Incidental. Endoscopy for exposure to asbestos. Smooth endotracheal lesion with yellowish area macroscopically.	Trachea	POSITIVE

Lesion 4 and lesion 5 were presented by the same patient

M male, F female, COPD chronic obstructive lung disease