[Gamma knife radiosurgery for malignant melanoma in the paranasal sinuses: case report].
A case of malignant melanoma in the paranasal sinuses, successfully treated with gamma knife stereotactic radiosurgery, is reported. A 90-year-old man with left periorbital swelling was referred to our hospital for gamma knife radiosurgery. He had a 4-month history of left periorbital swelling and ophthalmalgia, but he was treated conservatively due to his age. CT showed a large mass with bone destruction located in the nasal cavity, paranasal sinuses, and orbita. A 15 Gy peripheral dose was administered to the upper portion of the tumor with the gamma knife technique, at the 50% isodose line using a 18 mm collimator (21 shots). Seven months after radiosurgery, his left periorbital swelling was improved markedly, and CT showed a significant reduction in the volume of the tumor. Gamma knife radiosurgery is a feasible treatment for malignant melanoma in the paranasal sinuses. It provides excellent quality of life, less injury to the patient, and fewer side effects than other treatment strategies.
Department of Neurosurgery, Fukuoka Kinen Hospital, Japan.
Nobutaka
N
Horie
Nobuaki
N
Takahashi
Shoji
S
Furuichi
Katsuharu
K
Mori
Shoubu
S
Shibata
D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008297:Male; D008545:Melanoma / Q000473:pathology / Q000601:surgery*; D010255:Paranasal Sinus Neoplasms / Q000473:pathology / Q000601:surgery*; D016634:Radiosurgery; D016896:Treatment Outcome