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Pineal Germinoma with granulomatous reaction: case report
Hiroki Nishibayashi1, Yuji Uematsu, Tomoaki Terada
1Department of Neurological Surgery, Wakayama Medical University, Japan. hirokin@wakayama-med.ac.jp
Neurologia Medico-Chirurgica
|August 30, 2005
Summary
A rare pineal region germinoma with granulomatous reaction presented atypically. Prompt chemoradiotherapy led to complete tumor disappearance, highlighting the need for accurate diagnosis.
Area of Science:
- Neurology
- Oncology
- Pathology
Background:
- Pineal region tumors are rare and can present with diverse neurological symptoms.
- Germinomas are the most common germ cell tumors in the pineal region, typically responding well to treatment.
Observation:
- A 20-year-old man presented with diplopia, skew deviation, and upbeat nystagmus.
- Imaging revealed a homogeneous, enhancing mass in the pineal region, negative for common tumor markers.
- Histopathology showed germinoma cells with significant inflammatory infiltration, mimicking granulomatous inflammation.
Findings:
- The final diagnosis was germinoma with a prominent granulomatous reaction.
- Chemoradiotherapy resulted in complete radiological disappearance of the pineal mass.
- Cerebral angiography did not show tumor staining, and serum/CSF markers were negative.
Implications:
- This case underscores the importance of considering germinoma in the differential diagnosis of pineal region masses, even with atypical inflammatory features.
- Awareness of this rare germinoma variant can prevent misdiagnosis and guide appropriate therapeutic strategies.
- Successful chemoradiotherapy suggests efficacy for this specific tumor subtype.