![Dorsal border [obtusus] - Dog - Osteology - Thorax - vet-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/vetanatomy/modules/dog-radiographs/images/v2/2bb964b53449feec39bf001def8633c1f424f5ccf46a7f71f58c1cafc9edf86c?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=OTQ2LDMyOA&t=RG9yc2FsIGJvcmRlciBbb2J0dXN1c10&tx=946&ty=328&w=350&wk=1&s=417a1d41189a16af4e27cc8d7aa273a8)
Dorsal border [obtusus]
Margo dorsalis [obtusus]
- Related terms: Dorsal border of lung
Definition
The dorsal [obtuse] border is the rounded posterior edge of the lung, opposite the ventral border or the sharp border of the hilus. It separates the costal surface from the mediastinal surface and has a blunt, non-angular shape.
References
König HE, Liebich HG. Veterinary Anatomy of Domestic Mammals: Textbook and Colour Atlas. 7th ed. Stuttgart: Thieme; 2020.
Dyce KM, Sack WO, Wensing CJG. Textbook of Veterinary Anatomy. 5th ed. St. Louis: Elsevier; 2017.
Nomina Anatomica Veterinaria (NAV). 6th ed. Hannover: Editorial Committee, World Association of Veterinary Anatomists; 2017.
![Dorsal border [obtusus] - Dog - Osteology - Thorax - vet-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/vetanatomy/modules/dog-radiographs/images/v2/2bb964b53449feec39bf001def8633c1f424f5ccf46a7f71f58c1cafc9edf86c?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=OTQ2LDMyOA&t=RG9yc2FsIGJvcmRlciBbb2J0dXN1c10&tx=946&ty=328&w=200&wk=1&s=93c53c294194b3b061111696155f51b7 "Dorsal border [obtusus] - Dog - Osteology - Thorax - vet-Anatomy")
![Dorsal border [obtusus] - Dog - Thorax - Transversal - vet-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/vetanatomy/modules/dog-thorax-ct/images/v1/f3b92ede2a02c6a04be2de69bff157b9348c78ca195f0abd768d797789d6c8ec?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=MzY5LDIzNw&t=RG9yc2FsIGJvcmRlciBbb2J0dXN1c10&tx=369&ty=237&w=200&wk=1&s=40441a7a07ebeea1ac17c2ba2263b71a "Dorsal border [obtusus] - Dog - Thorax - Transversal - vet-Anatomy")
![Dorsal border [obtusus] - Dog - Thorax - Sagittal - vet-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/vetanatomy/modules/dog-thorax-ct/images/v1/aaaf8d393143e3dffa63afb964de72b1c4307bb8ef4f5bff3d765c3ab80dce82?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=MzUyLDI3Nw&t=RG9yc2FsIGJvcmRlciBbb2J0dXN1c10&tx=352&ty=277&w=200&wk=1&s=3599169483038ae0eae856557ca7c36a "Dorsal border [obtusus] - Dog - Thorax - Sagittal - vet-Anatomy")
![Dorsal border [obtusus] - Dog - Thorax - Dorsal - vet-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/vetanatomy/modules/dog-thorax-ct/images/v1/16415a6c762ae085a0f115bbeeb77a51dd582c123e7a91605da963449ebd74fb?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=MzcyLDI3Ng&t=RG9yc2FsIGJvcmRlciBbb2J0dXN1c10&tx=372&ty=276&w=200&wk=1&s=423a89e6e1afe778d37f805e04cc38bd "Dorsal border [obtusus] - Dog - Thorax - Dorsal - vet-Anatomy")
![Dorsal border [obtusus] - Dog - Thorax - 3D - Trachea/Lungs - vet-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/vetanatomy/modules/dog-thorax-ct/images/v1/d1443d7e248d568aaff407003af5ac35412fed1a46090452914f689278be5348?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=Mzk3LDMyNA&t=RG9yc2FsIGJvcmRlciBbb2J0dXN1c10&tx=397&ty=324&w=200&wk=1&s=23016820a013ae87472ce238bf1e3460 "Dorsal border [obtusus] - Dog - Thorax - 3D - Trachea/Lungs - vet-Anatomy")
![Dorsal border [obtusus] - Cat - Osteology - Thorax - vet-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/vetanatomy/modules/cat-radiographs/images/v1/715c791496078f8d596a74afd7711b2ee36d7b4956e46c7f57586623aae4bba6?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=ODg0LDQ5NA&t=RG9yc2FsIGJvcmRlciBbb2J0dXN1c10&tx=884&ty=494&w=200&wk=1&s=e0d45589f51bc5f6d45772c291dbd7e6 "Dorsal border [obtusus] - Cat - Osteology - Thorax - vet-Anatomy")
