Multiphasic Multidetector Computed Tomography Study of a Rare Tracheal Tumor: Granular Cell Tumor

Table 2

Differential diagnosis table for granular cell tumor of trachea.

Entity	CT findings
Hamartoma	“Popcorn” calcifications; low density for adipose content
Hemangioma	Rich enhancement in the arterial phase, filling from the periphery toward the center of the lesion
Tracheobronchial leiomyoma	Oval, lobulated, or round contour, homogeneous content with homogeneous enhancement. 25–46 HU on unenhanced CT and 46–85 HU on portal phase
Lipoma	HU from −50 to −100 (density of fat)
Carcinoid	Rich enhancement in the arterial phase (150 HU). Calcification (30% of cases)