Malignant triton tumor in a patient with neurofibromatosis type 1

Hiroko Naganuma; Masato Funaoka; Shusei Fujimori; Hiroshi Yoshioka; Hiroko Hirano; Hideaki Ishida; Tomoya Komatsuda; Mamiko Yamada; Yuji Nishikawa

doi:10.1007/s10396-007-0138-y

Malignant triton tumor in a patient with neurofibromatosis type 1

J Med Ultrason (2001). 2007 Jun;34(2):107-11. doi: 10.1007/s10396-007-0138-y. Epub 2007 Jun 21.

Authors

Hiroko Naganuma¹, Masato Funaoka², Shusei Fujimori², Hiroshi Yoshioka³, Hiroko Hirano⁴, Hideaki Ishida⁵, Tomoya Komatsuda⁵, Mamiko Yamada⁵, Yuji Nishikawa⁶

Affiliations

¹ Department of Internal Medicine, Yokote Municipal Hospital, 5-31 Negishi-Cho, Yokote, Akita, 013-8602, Japan. hiron@vesta.ocn.ne.jp.
² Department of Internal Medicine, Yokote Municipal Hospital, 5-31 Negishi-Cho, Yokote, Akita, 013-8602, Japan.
³ Department of Surgery, Yokote Municipal Hospital, Akita, Japan.
⁴ Department of Radiology, Yokote Municipal Hospital, Akita, Japan.
⁵ Center of Diagnostic Ultrasound, Akita Red Cross Hospital, Akita, Japan.
⁶ Department of Pathology, Akita University School of Medicine, Akita, Japan.

PMID: 27278294
DOI: 10.1007/s10396-007-0138-y

Abstract

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.

Keywords: contrast-enhanced ultrasound; hemorrhage; malignant triton tumor; neurofibromatosis type 1; ultrasound.