Primary glioblastoma mimicking brain metastasis in ALK-positive lung adenocarcinoma: a case report and literature review - Scorecard - MDSpire

Primary glioblastoma mimicking brain metastasis in ALK-positive lung adenocarcinoma: a case report and literature review

  • By

  • Mengyuan Li

  • Hanghuang Jin

  • Jianhua Luo

  • Cheng Zheng

  • May 15, 2026

  • 0 min

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Clinical Scorecard: Primary Glioblastoma Presenting as Brain Metastasis in a Patient with ALK-Positive Lung Adenocarcinoma: A Case Study and Review of the Literature

At a Glance

CategoryDetail
ConditionPrimary Glioblastoma
Key MechanismsMetachronous double primary cancers (DPCs) in the context of ALK-positive lung adenocarcinoma.
Target PopulationPatients with ALK-positive lung adenocarcinoma and new intracranial lesions.
Care SettingOncology and neurology clinics.

Key Highlights

  • New intracranial lesions in lung cancer patients may indicate a second primary cancer.
  • Differentiation between brain metastasis and primary brain tumors is challenging.
  • Timely pathological confirmation can reduce diagnostic delays.
  • ALK-positive lung cancer patients are at high risk for brain metastases.
  • The patient developed glioblastoma two years post lung cancer surgery.

Guideline-Based Recommendations

Diagnosis

  • Consider second primary cancers in patients with new intracranial lesions.

Management

  • Use targeted therapy and local radiotherapy based on accurate diagnosis.

Monitoring & Follow-up

  • Regular follow-up imaging for early detection of new lesions.

Risks

  • Misdiagnosis can lead to inappropriate treatment and poor outcomes.

Patient & Prescribing Data

ALK-positive lung adenocarcinoma patients.

Initial treatment with ensartinib followed by lorlatinib after misdiagnosis.

Clinical Best Practices

  • Maintain a high index of suspicion for second primary cancers.
  • Conduct multidisciplinary reviews for complex cases.
  • Ensure timely imaging and pathological evaluations.

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