Solitary fibrous tumor of the dura

Case contributed by Dr Ricardo Castro

Presentation

65 year-old man with reeling and wide-based gait.

Patient Data

Age: 65
Gender: Male

Enhancing mass in the posterior fossa.  The fourth ventricle and left cerebellar peduncle are deviated to the right.

MRI reveals a posterior fossa extra-axial mass which demonstrates very low SI in T2 and FLAIR, mildly low SI on T1 and avidly enhancing post Gad administration. The mass shows no restriction on DWI. The mass is broad based on the left tentorium cerebelli with small portion shows supratentorial extension. There is no vasogenic oedema. The fourth ventricle and left cerebellar peduncle are deviated to the right. T2 hyperintense white matter foci are within normal limits for the patient's age.

Case Discussion

This patient underwent surgery. The mass was resected with histopathological diagnosis of "fibrous solitary tumor". Pathology report refers high celullarity proliferation, forming fascicules orientated at different directions, and occasionally intracellular collagen strips. There is no significant cellular atypia or mitoses. There is no necrosis. In some sections dura infiltration is seen. Immuno-histological study shows: CD34+ , STAT6+, EMA- and PS100-.

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Case information

rID: 51180
Case created: 6th Feb 2017
Last edited: 9th Feb 2017
Inclusion in quiz mode: Included

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