Malignant triton tumor in a patient with neurofibromatosis type 1.
We report a case of neurofibromatosis type 1 (NF1) complicated by a malignant triton tumor (MTT), with an emphasis on B-mode sonographic (US) and contrast-enhanced US (CEUS) findings. To the best of our knowledge, this is the first report describing CEUS findings of MTT. The mass was poorly demarcated and composed of an internal echogenic area and an outer hypoechoic zone. CEUS findings showed the outer zone to be strongly enhanced, and the internal area was very poor in blood flow because of necrotic tissues.
Department of Internal Medicine, Yokote Municipal Hospital, 5-31 Negishi-Cho, Yokote, Akita, 013-8602, Japan. hiron@vesta.ocn.ne.jp.
Hiroko
H
Naganuma
Department of Internal Medicine, Yokote Municipal Hospital, 5-31 Negishi-Cho, Yokote, Akita, 013-8602, Japan.
Masato
M
Funaoka
Department of Internal Medicine, Yokote Municipal Hospital, 5-31 Negishi-Cho, Yokote, Akita, 013-8602, Japan.
Shusei
S
Fujimori
Department of Surgery, Yokote Municipal Hospital, Akita, Japan.
Hiroshi
H
Yoshioka
Department of Radiology, Yokote Municipal Hospital, Akita, Japan.
Hiroko
H
Hirano
Center of Diagnostic Ultrasound, Akita Red Cross Hospital, Akita, Japan.
Hideaki
H
Ishida
Center of Diagnostic Ultrasound, Akita Red Cross Hospital, Akita, Japan.
Tomoya
T
Komatsuda
Center of Diagnostic Ultrasound, Akita Red Cross Hospital, Akita, Japan.
Mamiko
M
Yamada
Department of Pathology, Akita University School of Medicine, Akita, Japan.
Yuji
Y
Nishikawa
contrast-enhanced ultrasound; hemorrhage; malignant triton tumor; neurofibromatosis type 1; ultrasound