List of pathological dinosaur specimens

This individuals neck exhibits extensive bony growth with a "cauliflower" texture fusing the fifth through 9th vertebrae and their ribs.

Rega, Holmes, and Tirabasso have hypothesized that this growth was a chondrosarcoma resulting from several osteochondromas occurring there.

Royal Ontario Museum Chasmosaurus belli Canada The skull of ROM 843 exhibits resorption of bone both near the eye-horns and on the frill, thought to be signs of aging.

Royal Tyrrell Museum of Paleontology[4] Centrosaurus Canada An unidentifiable skull bone from this specimen seems to have been "[d]iseased".

Royal Tyrrell Museum of Paleontology[4] Centrosaurus Canada A round exostosis formed on the shaft of this specimen's ulna.

Campanian Wapiti Formation Canada One of the rearward left dorsal ribs has a false joint.

Campanian Wapiti Formation Canada This animal seems to have broken the shaft of one of its middle ribs and a bony callus formed there.

Campanian Wapiti Formation Canada A rounded growth of unknown origins projects from the underside of this specimen's squamosal bone.

Campanian Wapiti Formation Canada The left quadrate of this animal is concave where it should be convex, bears a bone spur, and has a 2 cm long rounded pit.

Campanian Wapiti Formation Canada This animal broke the rear part of the left side of its frill area and lost the spike there.

Campanian Wapiti Formation Canada One of this animal's neck vertebrae exhibited several pathologies.

This vertebra had deformed prezygapophyses, a bone spure on its centrum and the rear surface of its end plat Tanke and Rothschild characterized as having a "'moth-eaten' appearance".

Campanian Wapiti Formation Canada This animal's parietal bar was eroded, possibly due to osteomyelitis.

Campanian Wapiti Formation Canada This animal had a "healing" fracture in one of its rear right dorsal ribs.

Royal Tyrrell Museum of Paleontology[4] Centrosaurus Canada This animal broke one of its fibulae, which healed to form a false joint.

Campanian Wapiti Formation Canada This animal fractured the rear part of its parietal and a false joint formed there.

Campanian Wapiti Formation Canada One of this specimens left rear dorsal ribs has a false joint.

Campanian Wapiti Formation Canada The neural spine of one of the vertebrae mid-length down the animal's tail was fractured.

Campanian Wapiti Formation Canada A bony callus grew at the site of a fractured rib in this specimen.

Campanian Wapiti Formation Canada This animal's right quadrate was cracked and had a pit near the bone's medial condyle.

Campanian Wapiti Formation Canada This specimen had a bony lump on the underside of one of its rear left dorsal ribs' necks.

Campanian Wapiti Formation Canada The horns on the rear edge of the right parietal were larger and curved in a different direction than those on the left side.

Royal Tyrrell Museum of Paleontology[4] Centrosaurus Canada A thin callus of bone formed on one of this specimen's ribs.

Royal Tyrrell Museum of Paleontology[4] Centrosaurus Canada This specimen has a lesion on its left squamosal bone.

Royal Tyrrell Museum of Paleontology[4] Centrosaurus Canada The far end of one of this specimen's phalanges is covered in pits.

Royal Tyrrell Museum of Paleontology[4] Centrosaurus Canada One of this specimens rear dorsal ribs has a callus that formed at the site of a fracture.

Royal Tyrrell Museum of Paleontology[4] Centrosaurus Canada One of this specimen's rear ribs has a large false joint.

Denver Museum of Natural History Camarasaurus grandis[7] Late Jurassic Morrison Formation[6] United States[6] The right humerus of this animal exhibits a spur-like lesion resulting from the healing process following a "stress injury or repetitive overexertion of the muscles resulting in an avulsion".

Denver Museum of Natural History Stegosaurus stenops Late Jurassic Morrison Formation United States

[8] Some experts have hypothesized that gout caused the formation of small patches of eroded bone discovered on Sue's first and second metacarpals.