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PATHways - American College of Veterinary Pathologists

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Volume 3, Issue 1 Page 7<br />

Case Report<br />

The case <strong>of</strong> the Mass-Laden Macaque<br />

The presentation…………….<br />

Signalment: 10 year old, female, naive, cynomolgus macaque (Macaca fascicularis).<br />

History: On routine external examination, a mass was palpated in the caudal abdomen.<br />

Examination <strong>of</strong> a fine needle aspirate from the mass was non-specific and contained<br />

erythrocytes, hemosiderin-filled macrophages, and rare neutrophils. The animal was<br />

euthanized and necropsied. Clinical pathology (hematology, coagulation, routine<br />

clinical chemistry) identified a slightly decreased hematocrit (31%).<br />

Necropsy: The urogenital tract and colon/rectum were consolidated into a mottled,<br />

firm, irregular, approximately 4 x 4 x 5 cm mass that contained many blood filled cysts.<br />

Gross appearance <strong>of</strong> endometriosis in a human. The rectum is adherent to the left uterosacral ligament and the<br />

back <strong>of</strong> the cervix with endometriosis. (http://www.gynaecology.spotmysite.com/page/649/)<br />

Special thanks to Dr. Gaurav Tyagi, Senior Principal Scientist, Roche Pharmaceuticals, for contributing this case.

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