2024年8月7日 · Patients with pilocytic astrocytomas can present symptoms secondary to a posterior fossa mass effect. This may include obstructive hydrocephalus with resultant headache, nausea, vomiting, and papilledema.

2024年11月7日 · In posterior fossa tumors, there is predominantly a mass effect with signs of raised intracranial pressure, especially when hydrocephalus is present. Bulbar symptoms or cerebellar symptoms may also be present. The cell of origin of pilocytic astrocytomas has not been established and may be different depending on location.

2022年10月13日 · Many types of astrocytoma are found in the posterior fossa of children, however, two make up the majority of cases: juvenile pilocytic astrocytoma (JPA) diffuse midline glioma, H3 K27-altered. In adults, high-grade astrocytomas …

Pilocytic astrocytoma is a central nervous system tumor made up of star-shaped cells in your brain. It most often affects children and adults before age 20. This tumor is low-grade, which means it’s treatable and leads to a good prognosis if detected early.

With malignant pediatric posterior fossa lesions, the whole neuroaxis must be imaged to assess for metastasis. Spinal seeding or leptomeningeal dissemination is extremely rare in PA; therefore, it is only

The head computed tomography (CT) scan with contrast showed an inhomogeneous solid mass originating from the right cerebellum, which compressed the fourth ventricle and right cerebellum, suggesting pilocytic astrocytoma with differential diagnoses of sub-ependymoma and posterior fossa ependymoma and obstructive hydrocephalus with trans ...

2022年12月1日 · To assess the impact of posterior fossa pilocytic astrocytoma (PA) removal in pediatric patients, with special focus on postoperative neurological outcome after repeated surgery for tumor remnants.

Posterior fossa mass containing cystic foci either originating from the fourth ventricles or invading it secondarily, responsible for obstructive hydrocephalus with transependymal resorption. ADC (not shown) demonstrates only moderate restricted diffusion. The differential diagnosis for this lesion includes medulloblastoma and pilocytic ...

Pilocytic astrocytoma, involving the optic pathways, optic nerve, and chiasm, typically form fusiform masses. It is the most common site in NF1 patients in whom bilateral tumors may arise (Fig. 2a). In the posterior fossa, PA may involve primarily …

We retrospectively reviewed the data from 33 patients harbouring a pilocytic astrocytoma of the posterior fossa to evaluate the impact of surgical technique in terms of radicality and of postoperative imaging results upon prognosis and adjunctive treatment.