Case 245 -- Parietal Lobe Lesion

Contributed by Helena Gutnik, MD, Zvezdana Dolenc-Strazar, MD and Mara Popovic, MD, PhD
     Institute of Pathology, Medical Faculty, University of Ljubljana, Ljubljana, Slovenija
Published on line in September 2000


15-year-old white girl was admitted to neurological department after an attack of seizures. The CT scan and MRI revealed a circumscribed, demarcated lesion in the cortex of the left parietal lobe designated as meningioma by neuroradiologist (Fig. 01). A resection of the lesion was performed.


The lesion was composed of spindle and oval shaped cells with eosinophilic finely granular cytoplasm. A considerable number of cells had foamy cytoplasm. The nuclei were round, oval or reniform and an occasional regular mitosis was seen. The giant cells, mostly of Touton type, were scattered in the lesion (Figs. 02, 03, 04, 05, 06, 07 and 08). Some giant cells showed the phenomenon of emperipolesis. Some scattered B lymphocytes and small clusters of T lymphocytes were also present. Immunohistochemically majority of histiocytes and giant cells were labeled with antibodies against CD68 (Fig 11), MAC387 (Fig. 12), and S-100 protein (Fig. 09) while there was no labeling with anti-CD1a antibodies (Fig. 10). Electron microscopic examination of the lesion did not demonstrate Birbeck granules.

Subsequent examination of the patient did not reveal any similar lesion either in the skin or in other location.



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