Benign nerve sheath tumour

Case contributed by A.Prof Frank Gaillard

Presentation

Incidental occipital skull finding on CT for further investigation.

Patient Data

Age: 35 Years
Gender: Female
Modality: MRI

The outer table of the left occipital bone is thinned and the defect filled with high T2 signal material. Unfortunately the patient is allergic to contrast. 

No inner table breach or meningeal abnormality. 

Case Discussion

The patient went on to have surgery.

Histology

MICROSCOPIC DESCRIPTION: Sections show subcutaneous tissue containing a non-encapsulated ill defined spindle cell tumour composed of short fascicles. Tumour cells contain scant eosinophilic cytoplasm and wavy nuclei. Scattered mast cells are present. No epidermis is present. No atypia or mitoses are seen. There is no evidence of malignancy. Immunohistochemically tumour cells stain: S100+, CD34-, SMA- and Factor XIIIa-.

FINAL DIAGNOSIS: Benign nerve sheath tumour.

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Case Information

rID: 41944
Case created: 29th Dec 2015
Last edited: 28th Apr 2016
Inclusion in quiz mode: Excluded

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