Study maps MRI anatomy of European legless lizard
Bottom line
A new paper in Animals maps the normal whole-body MRI anatomy of Pseudopus apodus, the European legless lizard, using both high-field and low-field systems. The study, published September 24, 2026, examined four healthy adults and found that both MRI approaches could identify major soft-tissue structures, while high-field MRI delivered sharper definition and better signal-to-noise for fine detail. The authors paired their MRI interpretation with prior dissection and CT work in the same species, adding a more complete imaging reference for a reptile that has been anatomically underdescribed in the veterinary literature. (mdpi.com)
Why it matters: For veterinary teams seeing reptile patients, especially exotics practices and referral imaging services, the study adds species-specific baseline anatomy that can help distinguish normal from pathologic findings. That matters because reptile imaging is often harder to interpret than mammalian imaging due to limited soft-tissue contrast on radiographs, variable anatomy across species, and the need for strong anatomic reference points when reading advanced imaging. The paper also suggests low-field MRI, while less detailed than 1.5T imaging, may still have practical value when high-field access is limited. (merckvetmanual.com)
What to watch: The next step will be whether these baseline MRI descriptions are used in clinical case series to improve diagnosis of coelomic, neurologic, or musculoskeletal disease in reptile patients. (mdpi.com)
Key facts
- Study type
- Descriptive MRI anatomy study
- Species
- Pseudopus apodus, the European legless lizard
- Publication date
- September 24, 2026
- Sample size
- Four healthy adult animals
- MRI systems
- High-field 1.5T and low-field 0.23T
- Main finding
- Both MRI systems identified major anatomic structures, but high-field MRI gave better soft-tissue detail
- Notable limitation
- Low-field images were less detailed, and some gastrointestinal structures were harder to resolve
- Reference context
- The authors paired MRI findings with prior dissection and CT work in the same species
A newly published descriptive study in Animals gives veterinarians one of the most detailed MRI roadmaps yet for Pseudopus apodus, the European legless lizard. Published September 24, 2026, the paper compares high-field 1.5T MRI with low-field 0.23T MRI and concludes that both can depict key anatomic structures, although high-field imaging provides better definition of soft tissues and superficial structures such as osteoderms. (mdpi.com)
That fills a notable gap in reptile imaging. The authors note that anatomic information for Pseudopus apodus has been limited, with prior work focused more heavily on the axial skeleton. More recently, the same research group described the species’ coelomic anatomy using dissection and multi-detector CT, and separate work characterized its brain with MRI and histology. This new paper extends that foundation to whole-body soft-tissue MRI anatomy, creating a more clinically useful reference set for future diagnostic workups. (mdpi.com)
The study used four healthy adult animals, with low-field MRI performed in two individuals and high-field MRI in three. Because whole-body high-field imaging with a long surface coil did not produce adequate resolution, the team scanned the cranial, middle, and caudal thirds separately in transverse, sagittal, and dorsal planes. Animals were imaged under general anesthesia using intramuscular alfaxalone for induction, followed by isoflurane titrated to effect, with spontaneous ventilation maintained throughout. Total scan time was about 60 to 75 minutes per animal. (mdpi.com)
Across the exams, the researchers reported that both systems could identify a wide range of structures, including the nasal cavity, ethmoturbinates, eyes, third eyelid, thyroid gland, cardiac chambers, major vessels, trachea, lungs, and multiple coelomic organs. The preprint version and final article also highlight species-specific findings such as left-right pulmonary asymmetry, with the left lung shorter than the right, consistent with prior descriptions of serpentiform lizards. Still, some structures were harder to resolve, particularly in low-field images and in parts of the gastrointestinal tract, where distinguishing wall from luminal contents remained challenging. (mdpi.com)
Outside this paper, the broader imaging literature helps explain why the study matters. Merck’s veterinary manual notes that reptile radiography is often limited by poor contrast, compact body size, and interference from keratinized scales or osteoderms. A review in Veterinary Record similarly emphasizes that snakes and lizards show major interspecies variation and that accurate interpretation depends heavily on strong knowledge of normal anatomy. In that context, a species-level MRI atlas is more than descriptive, it’s a practical diagnostic aid. (merckvetmanual.com)
Why it matters: For veterinary professionals, especially those in exotics, zoo, and referral imaging settings, this paper offers a reference point for interpreting advanced imaging in an uncommon but clinically relevant reptile species kept by some pet parents and collections. It also reinforces a broader point in reptile medicine: modality choice is often a compromise between access, image quality, anesthesia time, and the clinical question. High-field MRI appears best when fine soft-tissue detail is needed, but the study suggests low-field systems may still be useful for identifying major structures where resources are more limited. That could be relevant for practices weighing whether MRI can add value beyond radiography, CT, or ultrasound in selected reptile cases. (mdpi.com)
No outside expert commentary or industry reaction was readily available at the time of review, which is not unusual for a niche anatomic imaging paper in an exotic species. Still, the study sits within a growing body of work applying advanced imaging to reptiles, and its publication in a special issue focused on diagnostic and therapeutic advances for companion and exotic animals suggests continued interest in expanding these tools beyond traditional small animal patients. (mdpi.com)
What to watch: The key question now is whether this anatomic baseline translates into clinical case reports and prospective use in live reptile patients with neurologic, respiratory, reproductive, or coelomic disease. If follow-on studies compare MRI findings with confirmed pathology, this paper could become a reference standard for a species where normal soft-tissue anatomy has been difficult to document noninvasively. (mdpi.com)