The calcified intracorporeal vacuole: an aid to the pathological diagnosis of solitary cerebral cysticercus granulomas

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Abstract
Fifty four cases of single small (<20 mm) enhancing CT lesions (SSECTLs) of the brain that were excised between 1987 and 1995 were reviewed histologically. In 28 cases the entire cysticercus or its parts were found. In the remaining 26 cases, most had a histological picture suggestive of a parasitic granuloma. In six of these 26 cases, small ovoid masses corresponding in morphology to the intracorporeal vacuoles of a cysticercus were seen lying free in the cavitary space of the granuloma. This lends further strength to the contention that SSECTLs of the brain are caused by cysticercus, and that in the event of a surgical excision, absence of obvious parasitic parts should necessitate a closer search, as calcareous residues of the parasite might be the only evidence of the cysticercal aetiology in the granuloma.

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