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Metastasis germinomas of the external acoustic meatus: in a 19-year-boy: a case report
Authors:Rong Zhao  Jiang Wang  Ya Ba  Qiong Zhang
Affiliation:1.Department of Nuclear Medicine, Urumqi General Hospital of Lanzhou Military Region, Urumqi, Xinjiang, 830002, China;2.Department of General Surgery, Urumqi General Hospital of Lanzhou Military Region, Urumqi, Xinjiang, 830002, China;3.Department of Nuclear Medicine, The First Affiliated Hospital of Xinjiang Medical College, Urumqi, Xinjiang, 830002, China;4.Medical Department, Urumqi General Hospital of Lanzhou Military Region, Urumqi, Xinjiang, 830002, China
Abstract:
Background: The external acoustic meatus metastasis of germinomas is a rare event. Case presentation: we describe a 19-year-old boy with stuffiness and earplug of the left ear but no other symptoms. The whole body F-18 FDG PET/CT and the brain MRI are performed and demonstrated a germinoma in the pineal gland and vermis cerebellum region and in the right of thalamus. Photomicrograph showing marked infiltration of lymphoplasma cells and macrophages including giant cells. Immunohistochemical analysis results demonstrated the tumor cells are strongly positive for CD117 and PLAP. The final diagnosis was germinoma and all adjuvant therapy was achieved. Conclusion: Although the external acoustic meatus metastasis of germinomas is rare, the diagnosis should be taken into serious consideration in order to improve. In addition, F-18 FDG PET/CT was very useful in diagnosis primary disease and excluding distant metastases. To our knowledge, this is the first published report of this type of case.
Keywords:Germinomas   external acoustic meatus   immunohischemistry   F-18 FDG PET/CT
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