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[Analysis of pathologic characteristics and prognosis in different subtypes of adult medulloblastoma]
Fu Zhao1, Jing Zhang, Xingchao Wang
1Beijing Neurosurgical Institute, Capital Medical University, Beijing 100050, China.
Objective:
To study the pathologic characteristics and prognosis in different subtypes of adult medulloblastoma (MB).
Methods:
The clinical information, imaging findings and pathologic characteristics of 151 cases of adult medulloblastomas were retrospectively reviewed and analyzed by chi-square test. The survival data were assessed using the Kaplan-Meier method.
Results:
Amongst the 151 MB cases studied, there were 73 cases of classic MB, 36 cases of desmoplastic/nodular MB, 39 cases of anaplastic MB and 3 cases of large cell MB. The primary tumors were more frequently located in cerebral hemisphere in desmoplastic/nodular MB than in other subtypes (P=0.000).On the other hand, large cell/anaplastic MB were associated with more frequently local recurrence and distant metastasis (P=0.003). The post-operative overall survival time ranged from 6 to 150 months, with median survival being (103.3±5.7) months (95%CI, 92.52 to 115.09). The median survival of classic MB, desmoplastic/nodular MB and large cell/anaplastic MB was (110.7±7.8) months, (125.5±7.6) months and (57.6±7.6) months, respectively. The differences were statistically significant (P=0.000).
Conclusions:
The three variants of MB show different biologic behavior. Large cell/anaplastic MB represents an independent poor prognostic indicator in adults.
Insights
Adult medulloblastoma (MB) subtypes exhibit distinct behaviors. Large cell/anaplastic MB is a significant indicator of a poor prognosis in adult patients.
Area of Science:
- Neuro-oncology
- Pathology
- Cancer Biology
Context:
- Medulloblastoma (MB) is a primary brain tumor typically occurring in children.
- Adult medulloblastoma is rare and its subtypes require further characterization.
- Understanding subtype-specific features is crucial for adult MB management.
Purpose:
- To investigate the pathological characteristics of adult medulloblastoma (MB) subtypes.
- To analyze the prognostic implications of different adult MB variants.
- To compare the clinical behavior and survival outcomes across adult MB subtypes.
Summary:
- This study retrospectively analyzed 151 adult medulloblastoma (MB) cases, classifying them into classic, desmoplastic/nodular, anaplastic, and large cell subtypes.
- Desmoplastic/nodular MB showed a predilection for the cerebral hemisphere, while large cell/anaplastic MB were linked to increased recurrence and metastasis.
- Survival analysis revealed significant differences, with large cell/anaplastic MB demonstrating the poorest prognosis (median survival 57.6 months).
Impact:
- The findings highlight that adult medulloblastoma (MB) variants possess different biological behaviors.
- Large cell/anaplastic medulloblastoma (MB) is identified as an independent poor prognostic indicator in adults.
- This research aids in refining prognostication and potentially guiding treatment strategies for adult MB patients.