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

Table 1

Summary of granular cell tumor of trachea.

Etiology	Schwann cell origin
Incidence	Very rare, 40 cases reported in literature
Gender	Most granular cell tumors are found in females
Age predilection	Third and fourth decades of life
Risk factors	Unknown (hyperestrogenic state had been hypothesized)
Treatment	Chirurgy
Prognosis	Good with successful resection
Finding on imaging	Smooth and well-defined margins, elevated contrast enhancement in arterial phase, and a modest release of contrast in venous phase