Diagnosis
Grade I pilocytic astrocytoma of the left thalamus extending into the midbrain. Obstructive hydrocephalus. Status post-third ventriculostomy and tumor biopsy.
Patient:
Child, 7 years old, Russia
Physician:
Prof. Dr. med. Martin Scholz, Head of Neurosurgery Department, Sana Hospital Duisburg
Expert Opinion by Prof. Martin Scholz:
The decision to perform a third ventriculostomy was timely and entirely correct, successfully resolving the obstructive hydrocephalus. However, this is an atypical tumor presentation, and repeat histopathological review may reveal a higher grade of malignancy than initially assumed. Imaging demonstrates a central core surrounded by a distinct rim of contrast enhancement. I am confident that we can achieve a substantial resection, leaving a minimal residual tumor volume of approximately 10–20%.
We plan to proceed via a transventricular dorsal approach utilizing 3D neuronavigation. The lesion reaches the ependymal lining of the lateral ventricle. Inferior extension toward the midbrain carries heightened clinical risks, necessitating continuous intraoperative neurophysiological monitoring (somatosensory and motor evoked potentials) to prevent postoperative neurological deficits.
If a small residual tumor fragment remains, management options include Temodal (temozolomide) chemotherapy, subsequent surgical debulking via a supracerebellar infratentorial approach, or local interstitial brachytherapy (stereotactic placement of radioactive seeds).
If histopathology confirms a classic WHO Grade I pilocytic astrocytoma, the long-term clinical outlook and prognosis for the child remain highly favorable.
Preliminary Cost Estimate: €45,000
Treatment Rendered:
Following inpatient admission, the patient underwent comprehensive preoperative optimization, including high-resolution navigation-sequence MRI scans. Through an interpreter, the parents received detailed counseling regarding the surgical plan and potential risks.
An extensive microsurgical resection of the brain tumor was performed via a midline parietal dorsal approach under 3D neuronavigation and continuous intraoperative neurophysiological monitoring (SEPs and MEPs). The procedure was completed without surgical complications. Postoperative CT imaging was unremarkable.
During the immediate postoperative period, mild right-sided hemiparesis and slight oculomotor disturbances were noted, which are recognized temporary sequelae of extensive brain tumor resections. During the initial 24-hour observation period in the pediatric intensive care unit, no new neurological deficits emerged. Following a favorable control MRI scan the next day, the patient was transferred to the standard neurosurgical ward. Over the subsequent days, progressive, steady recovery of clinical and neurological function was documented.
Definitive histopathological analysis of the resected tissue confirmed a Grade I pilocytic astrocytoma.
Actual Cost of Treatment: €33,260
Parents’ Inquiries:
- What interventions are necessary to achieve full recovery of motor and visual functions, and where do you recommend undergoing neurorehabilitation?
- What is the long-term prognosis for WHO Grade I pilocytic astrocytoma?
- What lifestyle guidelines should we follow moving forward, and what clinical signs require attention?
- If a ventricular shunt procedure becomes necessary in the future, which shunt system do you recommend?
Doctor's Answer:
- Intensive physical therapy and targeted occupational rehabilitation are essential. I anticipate that the child will achieve substantial functional recovery over the next three months. I advise completing rehabilitation in your home country; establishing strong trust and rapport with pediatric therapists in a familiar environment and language significantly enhances recovery.
- WHO Grade I pilocytic astrocytoma carries the most favorable long-term prognosis among all pediatric glial tumors.
- We advise a balanced diet rich in vegetables and fruits with reduced sugar and processed meat intake, along with moderate physical activity. The child will be able to resume a normal daily lifestyle in the near future.
- In our neurosurgical center, we preferentially utilize programmable Codman Medos valve systems for cerebrospinal fluid shunting.