Hemal nodes usually occur in the fat that lies along the vertebrae of the neck, near where the trachea is found. Hemal nodes may also occur in the abdominal cavity in the fat located along the vertebrae near the tenderloins. These nodes are numerous in ruminants (deer, elk, cattle, sheep), occur in small numbers in canids (dogs, coyotes, wolves), and are absent in many other animal species. Hemal nodes are usually ovoid (being larger than a pea), maroon or black in color, and may be either solid or fluid-filled. They resemble a very small spleen or blood clot, and are also called accessory spleens. Hemal nodes are very prominent and, as a result, many hunters see them, are concerned that they are diseased tissue, and submit samples for examination.
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