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Subcutaneous Leiomyosarcoma in a Common Squirrel Monkey (Saimiri sciureus).

Shin-Ichi Nakamura¹, Sachiko Iseda, Yumi Une

¹Laboratory of Veterinary Pathology, Azabu University, Fuchinobe, Sagamihara, Kanagawa 229-8501, Japan.

The Journal of Veterinary Medical Science

|January 9, 2010

Summary

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A rare soft tissue leiomyosarcoma (a type of cancer) was diagnosed in a young squirrel monkey. This tumor recurred after surgical removal, highlighting the need for further study in nonhuman primates.

Area of Science:

Veterinary Pathology
Oncology
Primate Medicine

Background:

Soft tissue leiomyosarcoma is a rare tumor primarily documented in humans and animals.
Tumors in nonhuman primates are typically observed in older individuals.

Observation:

A 3-year-old male squirrel monkey presented with a large right axillary mass.
The mass was surgically removed but demonstrated rapid recurrence.

Findings:

Histopathology and immunohistochemistry confirmed the tumor as leiomyosarcoma, evidenced by alpha-smooth muscle actin and desmin expression.
This case represents a rare occurrence of leiomyosarcoma in a young squirrel monkey, with documented tumor reoccurrence.

Implications:

This case contributes to the limited understanding of leiomyosarcoma in young nonhuman primates.

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Further research is warranted to explore the unique characteristics and behavior of this tumor in this demographic.