Recommended Free Tools
Feline Marfan syndrome is a newly described condition reported in two domestic-cat siblings. The cats had unusually long limbs, lenses displaced in both eyes, and dilation of the aortic root; researchers also identified a potentially disease-causing change in the FBN1 gene. The 2026 report is an important first characterization, but it does not show how common the condition is or establish a routine test or care protocol for cats.
What signs did the reported cats have?
The two littermates, Gary and Shaggy, were noted to have long limbs as kittens. Later veterinary examinations found bilateral lens luxation (displacement of the lenses in both eyes) and aortic root dilation. The researchers describe the eye and aortic findings as cardinal features of Marfan syndrome in these cats.
These are findings in two reported cats, not a validated checklist for diagnosing other cats. Similar signs warrant veterinary evaluation, but they do not by themselves establish Marfan syndrome.
What did the 2026 study find?
Whole-genome sequencing identified the same homozygous splice-region variant in FBN1 in both affected cats: XM_023255387.2:c.2678-3C>A, located three bases upstream of exon 22. Each cat had two copies, one inherited from each parent. FBN1 encodes fibrillin-1, a protein important to connective tissue.
#1 Best Overall
- Pet Carrier: 17.5” L x 11” W x 11” H, Recommended max load of 16 lbs cats small dogs. Please do not choose your carrier based on weight--please reference your pet's length and height in selecting a pet carrier size.
- Fits for under-seat dimensions of most airlines. Every airline has a specific set of rules and regulations, please contact with airline before flying with your cats small dogs.
- Mesh windows for ventilation, top and side entry with locking zippers for safety. Carrying handles, adjustable shoulder strap which can also be used as seatbelt, and back strap can fasten the pet carrier to your luggage.
- Pet carrier comes with a removable base insert, which creates a solid surface for your pet to stand on, along with a removable & hand washable cozy fleece pet bed, which offers a cozy sleeping space for your traveling cats small dogs.
- "Toys for pets, of textile materials". Mostly used as a Toy of Fabric Pet Home for pets playing and relaxing.
Follow-up cDNA sequencing showed exon 22 skipping in 73% of transcripts in the affected cat studied. The authors describe the variant as hypomorphic: it disrupted RNA splicing but did not eliminate all normal transcript. They interpret the remaining normal transcript as preserving some fibrillin-1 function.
Histopathology of an affected cat’s ascending aorta showed disrupted and fractured elastic-fiber tendrils, consistent with impaired fibrillin-1 function. Together, the clinical observations, genetic result, RNA analysis, and tissue findings support the authors’ characterization of Marfan syndrome in these littermates.
Rank #2
- [PRODUCT DIMENSIONS] Pet travel carrier size : 17x11x11 inches, recommended up to 15 lb pets, it is suitable for large, medium cats and small dogs. Please don't choose your airline cat carrying case based on weight, please refer to your pet's length and height when choosing a pet carrier size.
- [AIRLINE APPROVED] This cat carrier is designed with airline approved, it can fit comfortably under most flight seats, we can take our pets wherever we want. Dog travel carrier offers two attachment loop handles that can be used as a dual harness or as a luggage strap for balanced carry and secure transport.
- [EXCELLENT MATERIAL] Collapsible cat carrier is made of polyester fabric, supported by a steel ring, washable, wear-resistant and durable. The three sides and the top of this pet carrier are nylon mesh, scratch-resistant and not easy to damage, it can not only check your pet in real time, but also ensure enough air circulation.
- [SAFE AND COMFORTABLE] Dog travel bag has metal zippers on the top and side entrances, durable and not easy to deform, it allows your pets to enter and exit easily. The cat carrying case is equipped with an anti-escape safety buckle, which can effectively prevent pets from accidentally falling. It is suitable for car rides and vet rides.
- [PORTABLE AND FOLDABLE] Pet travel carrier comes with a detachable and hand washable wool pet bed, it can provide a comfortable sleeping space for your traveling pet. The cat travel case comes with an adjustable shoulder strap and handle for easy portability. When not in use, you can fold it up for storage.
How was feline Marfan syndrome diagnosed in the report?
The report combined clinical assessment with laboratory methods. The investigators examined the cats, used whole-genome sequencing to identify the variant, sequenced cDNA to assess its effect on RNA splicing, and examined aortic tissue histologically.
This describes the methods used in a research report, not a standard clinical workup. The published sources do not establish a routine diagnostic pathway or monitoring schedule for cats with suspected Marfan syndrome. If a cat has concerning eye, limb, or cardiovascular findings, a veterinarian can assess the individual case and decide whether referral to relevant specialists is appropriate.
Rank #3
- High Quality Design：Sturdy steel cage structure and wooden support board maintain good spatial stability and shape. Breathable mesh windows on four sides,which can ensure good air circulation and views,make pets have a comfortable and safe travel.It can also be easy for you to check on your pets.There is a front pocket to store pet toys,treats,etc.
- Dimension and Weight：Made of durable tear-resistant fabric.Four easy entrances for pets. Dimensions: 17 inch x 11 inch x 11 inch (L*W*H), suitable for pets up to 16 lbs.Please don't choose your carrier based on weight only,consider your pet's length and height when choosing a carrier.
- Airline Approved & Safty：Can be placed under the seats of most airplanes(Four non-slip feet on the bottom to prevent movement), and comfortably on the seat next to you in a car or bus.It has a adjustable shoulder strap.Can also be fastened to the car seat with a safety belt or shoulder strap to keep your pet safe.
- Easy to Clean ：You can clean the stains and dirt on the surface with a soft cloth.Soft mat inside the pet carrier is removable and washable.You can take it out and wash it easily to solve all stains.
- Easy to Collapsible & Lightweight：When not in use,fold it into a flat,space saving and easy to store.Only 2.2lbs,it's easier to carry around.It can also used as a toy of pet house,allowing pets to play in a safe space to relax and rest.
Is there a genetic test for cats?
The 2026 study identified a specific FBN1 variant in two related cats, but the available sources do not establish that a routine commercial feline test for this variant is available. Research sequencing and specialist interpretation in a published study are not the same as a validated, generally available clinical test.
Cornell’s account of the study quotes senior author Dr. Jacquelyn Evans saying, “The findings provide a foundation for improved veterinary diagnostics.” The article adds that the work “may help develop genetic tests.” That describes potential future value, not an existing test.
Rank #4
- 【 Spacious & Comfortable Cat Carrier 】The large cat carrier provides ample space for your feline friend to move, turn, and stretch during travel. Measuring 17.3 x 12.2 x 13.4 inches, it is wider and taller than most cat carriers, ensuring your pet feels comfortable and at ease while on the go.
- 【Balanced Mesh Design】Unlike other cat carrier hard, our cat carrier soft strikes the perfect balance with 40% mesh surface area. This ensures your pet can observe the surroundings and breathe easily while feeling safe and secure at the same time. The cat carrier large is suitable for pets in all kinds of situations.
- 【Built-in Dual-Sided Cushion】The detachable pad offers two distinct comforts: a cool side for summer and a super-soft, warm side for winter. You can easily flip it to match the season, providing the perfect temperature for your pet in any weather.
- 【Includes Foldable Bowl】Designed for on-the-go use, our foldable bowl carries 410g of food or 20oz of water. After use, simply collapse it and attach it directly to your pet's collar or leash, perfect for keeping your pet fueled and hydrated anywhere.
- 【Safe & Durable】Safety is our top priority, and the pet carrier for cat is equipped with a secure buckle to prevent your pet from escaping. The cat carrier soft is made of reinforced snow silk fabric and hard mesh material, ensuring durability and preventing any tearing during long-distance travel.
How does this compare with earlier feline research?
A 2011 report described primary lens instability in 10 related domestic shorthair cats across three generations. Its pedigree analysis suggested possible dominant inheritance and proposed FBN1 as a candidate, but it did not report a confirmed causal variant. The 2026 report adds a molecularly characterized variant in cats with a broader Marfan-like phenotype, including aortic root dilation.
| Study | What was reported | What it establishes |
|---|---|---|
| Payen et al., 2011 | Lens instability in 10 related cats over three generations | Pedigree evidence suggesting possible dominant inheritance and FBN1 as a candidate; not a confirmed causal variant. |
| Cook et al., 2026 | Two littermates with long limbs, bilateral lens luxation, and aortic root dilation, plus a homozygous FBN1 splice-region variant | A molecular and phenotypic characterization of these cases; not a prevalence survey or validation of a routine screening test. |
The earlier report should not be read as proof that all feline lens instability is Marfan syndrome, nor as evidence that the 2011 cats carried the variant identified in 2026.
Best Value
- Hard sided pet carrier with 2 doors for front and top entry; suitable for cat or extra-small dog breeds, such as chihuahuas and toy poodles (up to 11 pounds)
- Durable plastic construction with steel wire front door; screws keep the top and bottom sections securely connected
- Top door can swing open to the left or right for easy access and convenience
- Plenty of ventilation on sides, top, and back of the carrier
- Note: Be sure to measure the size of the pet when choosing carrier size
What is not yet known?
- How often feline Marfan syndrome occurs: the published cases do not establish prevalence in cats.
- Whether the identified variant explains similar signs in unrelated cats: the 2026 report concerns two littermates.
- Whether a routine clinical genetic test, standard treatment, or evidence-based monitoring schedule is available: the cited sources do not establish these.
The findings and limitations are described in Cook et al., “A homozygous hypomorphic FBN1 splice region variant in domestic cats with Marfan syndrome,” Scientific Reports, published September 19, 2026, and Cornell University College of Veterinary Medicine’s September 22, 2026 account. The earlier lens-instability report is Payen et al., published July 28, 2011.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
