Pathological features of intrathoracic histiocytic sarcoma in an Amami spiny rat (Tokudaia osimensis).

A 4-year 9-month-old Amami spiny rat reared in a zoo died following a history of anorexia, weight loss, and respiratory distress. At necropsy, neoplastic tissues were found along the pleura and adhered to the thoracic wall, heart, and lungs. Histologically, the tumor was composed of diffuse, patternless sheets of large round to polygonal neoplastic cells with abundant eosinophilic cytoplasm, and multinucleated giant cells were often present.

Reproductive characteristics of female lesser mouse deers (Tragulus javanicus) based on fecal progestagens and breeding records.

Information about breeding and the reproductive biology of mouse deer is limited in the wild and captivity. No reports on reproductive endocrinology are available. The objective of the present study was to observe the reproductive biology based on breeding records, to validate the utility of the non-invasive endocrine monitoring technique using feces of the female lesser mouse deer (Tragulus javanicus), and thus to clarify the reproductive physiology.