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MR IMAGING OF HISTIOCYTIC SARCOMA OF THE CANINE BRAIN
Author(s) -
TAMURA SHINJI,
TAMURA YUMIKO,
NAKAMOTO YUYA,
OZAWA TSUYOSHI,
UCHIDA KAZUYUKI
Publication year - 2009
Publication title -
veterinary radiology and ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.541
H-Index - 60
eISSN - 1740-8261
pISSN - 1058-8183
DOI - 10.1111/j.1740-8261.2009.01512.x
Subject(s) - histiocytic sarcoma , medicine , histiocyte , pathology , sarcoma , meningioma , magnetic resonance imaging , malignant histiocytosis , histiocytosis , lesion , encephalitis , infiltration (hvac) , radiology , virus , physics , disease , virology , thermodynamics
Histiocytic sarcomas are characterized by proliferation and/or infiltration of neoplastic histiocytes localized to specific organs, unlike malignant histiocytosis which involves many organ systems. Only a few cranial histiocytic sarcomas have been reported. Here we describe four dogs that presented with neurological deficits referable to the forebrain, and were diagnosed histologically as having histiocytic sarcoma. Using magnetic resonance (MR) imaging, the tumors were characterized by a T2‐hyperintense and T1‐isointense mass in one dog, T2‐ and T1‐isointense extraaxial masses in two dogs, and a diffuse T2‐hyperintense lesion over the left cerebral cortex in one dog. All tumors had contrast enhancement. MRI features in three of the four dogs were similar to that of meningioma, supported by the observation of a dural tail in two of these three dogs, and a broad base of attachment in the other. In the other dog the imaging findings were similar to those of encephalitis. Intracranial histiocytic sarcoma does not appear to have specific MR imaging features and can be confused with meningioma or encephalitis.