鼓室型グロームス腫瘍の2例 : 術前血管塞栓術の適応に関する考察 Two Cases of Glomus Tympanicum Tumor : Determining the Need for Preoperative Embolization in Patients with Glomus Tympanicum Tumor
Glomus tumors are highly vascular neoplasms of neural crest origin. Preoperative embolization provides certain advantages during surgery, including decreased blood loss and improved resection. However, the role that preoperative embolization should play is still a matter of controversy due to the risk of potential complications, such as cranial nerve deficits.<BR>The first case was resected without preoperative embolization, since it was a small tumor on the promontory. The surgery was completed successfully with little blood loss.<BR>The second case had preoperative embolization since the tumor was larger and extended to the hypotympanum. On preoperative angiography, the petrous branch of the middle meningeal artery and the stylomastoid artery contributed to the tumor's blood supply. Both of these arteries were occluded using PVA embolization material. Since both arteries are responsible for blood flow to the facial nerve, there was a risk of facial palsy, but, fortunately, no neurological abnormality occurred after embolization. Surgery was subsequently performed 24 hours after embolization.<BR>In the paper, the blood supply of glomus tympanicum tumors and variations in the blood supply to the facial nerve are discussed.<BR>Small Glasscock type 1 tumors do not require embolization.
- Otology Japan
Otology Japan 17(5), 665-670, 2007-12-25
THE JAPAN OTOLOGICAL SOCIETY