An 8-year-old boy presents with progressive truncal ataxia and repeated falls over 3 months. Vital signs show HR 88/min, BP 105/68 mmHg, RR 18/min, temperature 37°C. He denies headaches and vomiting. MRI reveals a midline cerebellar mass compressing the fourth ventricle without hydrocephalus. CSF analysis shows normal glucose and protein. Histopathology demonstrates densely packed small blue cells with high mitotic activity. Which diagnosis is most likely?
- A)Meningioma
- B)Ependymoma
- C)Glioblastoma
- D)Vestibular schwannoma
- E)MedulloblastomaGABARITO
Explicação
Medulloblastoma is correct. This highly malignant pediatric cerebellar tumor arises in the vermis and presents with truncal ataxia and hydrocephalus from fourth ventricle compression. It is composed of small blue cells and can spread through cerebrospinal flui... Ver explicação completa e trilha adaptativa →