Study sets liver and spleen ultrasound benchmarks in Saanen goats: full analysis

A May 2026 paper in Veterinary Radiology & Ultrasound establishes ultrasonographic reference dimensions for the liver and spleen in healthy lactating Saanen goats, a dataset that could sharpen abdominal imaging interpretation in caprine practice. In 34 goats, the authors mapped where each organ could be visualized by intercostal space, described normal parenchymal appearance, and reported vascular measurements for the splenic vein, portal vein, and caudal vena cava. (pubmed.ncbi.nlm.nih.gov)

The work builds on a relatively small but important body of goat ultrasound literature. Earlier studies from Ueli Braun and colleagues characterized the normal ultrasonographic appearance of the goat liver, portal vein, caudal vena cava, gallbladder, and spleen in healthy goats, including female Saanen animals, and emphasized that reference anatomy is essential before abnormal findings can be interpreted confidently. More recently, investigators in other breeds, including Jamunapari goats, have published additional liver and spleen measurements intended to support faster recognition of hepatosplenic disease. (pubmed.ncbi.nlm.nih.gov)

In the new study, the spleen was visualized between the 12th and 8th intercostal spaces and described as having homogeneous parenchyma with a hyperechoic capsule. The liver was observed between the 12th and 6th intercostal spaces and appeared hypoechoic and homogeneous. Reported mean diameters were 3.3 ± 0.9 mm for the splenic vein, 16.5 ± 2.6 mm for the portal vein, and 14.1 ± 3.4 mm for the caudal vena cava. The gallbladder had variable shapes, and 25 of 34 goats, or 73.5%, had anechoic gallbladder content. The authors said the goal was to establish reference ultrasonographic parameters for this population of healthy lactating Saanen goats. (pubmed.ncbi.nlm.nih.gov)

The broader literature helps frame why that specificity matters. A 2011 American Journal of Veterinary Research study in 27 female Saanen goats documented normal liver extent and found the portal vein diameter ranged from 0.8 to 1.7 cm, while the caudal vena cava width ranged from 1.2 to 1.8 cm on cross section. A 2008 report on normal goat liver ultrasonography similarly argued that size and texture measurements can serve as a reference for illness-related changes. In other words, the new paper doesn’t introduce caprine abdominal ultrasound from scratch, but it does refine the reference set for a clearly defined subgroup: healthy, lactating Saanen does. (pubmed.ncbi.nlm.nih.gov)

Direct outside commentary on this specific paper was limited in the sources available during review. Still, the direction of travel in the field is clear: recent goat and sheep imaging papers continue to expand normal reference datasets, suggesting ongoing interest in making ultrasound more actionable in small-ruminant medicine. Earlier goat imaging work also noted that ultrasonography is becoming more practical in the field and in general practice, especially when clinicians need a noninvasive, goat-side diagnostic tool. (sciencedirect.com)

Why it matters: For veterinary professionals, normal-reference studies are rarely flashy, but they’re foundational. In goats, hepatic and splenic abnormalities can be subtle on physical exam, and transrectal assessment options are limited compared with cattle. That makes ultrasound especially useful, but only if clinicians know what normal looks like for the animal in front of them. Breed, age, reproductive status, and production stage can all affect organ position and dimensions, so data from healthy lactating Saanen goats may be more clinically useful than extrapolating from mixed populations or other small ruminants. These benchmarks could support earlier recognition of hepatomegaly, splenomegaly, vascular congestion, fatty liver changes, or other abdominal disease, while reducing over-calling normal variation as pathology. (sciencedirect.com)

What to watch: The key next questions are external validation and clinical application, specifically whether these measurements hold across different herds and scanners, and how well they distinguish healthy goats from animals with confirmed hepatobiliary or splenic disease. Studies in diseased lactating goats, plus comparisons with non-lactating adults, kids, bucks, and other dairy or meat breeds, would make these reference values more useful in everyday decision-making. (pubmed.ncbi.nlm.nih.gov)