MSK Pathology Image-Based Learning

Brachygnathia

Palatoschisis

Prognathia

Pectus excavatum

Kyphosis

Scoliosis

Block vertebrae

Butterfly vertebrae (hemi vertebrae)

Lordosis

Scoliosis

Spina bifida

Amelia

Hemimelia

Micromelia

Notomelia

Peromelia

Adactyly

Dactylomegaly

Ectrodactyly

Syndactyly

Polydactyly

Syndactyly in a dolphin

Osteogenesis imperfecta

Osteogenesis imperfecta

Osteopetrosis

Femur osteopetrosis in a neonate

Congenital cortical hyperostosis

Congenital cortical hyperostosis

Porcine forelimb - expansion of woven bone dorsally and ventrally

Craniomandibular osteopathy (lion jaw)

Craniomandibular osteopathy (lion jaw)

Chondrodysplasia

Chondrodysplasia

Chondrodysplasia

Osteochondrosis dissecans

Osteochondrosis latens

Osteochondrosis manifesta

Cervical vertebral myelopathy ('wobbler syndrome')

Static (cervical vertebral static stenosis/ CVS)

Dynamic (cervical vertebral instability)

Osteoporosis

Osteoporosis

Rickets and osteomalacia

Fibrous osteodystrophy

Fibrous osteodystrophy

Vitamin D toxicity

Vitamin A toxicity

Lead toxicity

Fluoride toxicity

Exostosis

Enostosis

Osteophyte

Enthesophyte

Hyperostosis

Hypertrophic osteopathy (hypertrophic pulmonary osteopathy)

Osteochondromas

Bone cysts

Bone fractures

A - compound

B - transverse

C - linear

D - oblique non-displaced

E - oblique displaced

F - spiral

G - greenstick

H - comminuted

I - short oblique

J - long oblique

Fracture

Tibia and fibula

Distal diaphysis

Short oblique

Compound?

Cranially displaced

Epiphysiolysis

Valgus deformity

Varus deformity

Chronic pyogranulomatous osteomyelitis in a cow - Actinomyces bovis ("lumpy jaw")

Bone inflammation

Suppurative vertebral osteomyelitis in a pig - usually Streptococcus suis

Embolic (suppurative) osteomyelitis and physitis, bone, distal radius, foal

Embolic (suppurative) osteomyelitis, bone, horse, (a) distal tibial physis, (b) talus

Embolic bacterial physitis, osteomyelitis, periostitis (proximal first phalanx) and arthritis (metacarpal-phalangeal joint), horse

Embolic (suppurative) osteomyelitis, bone, distal femur, medial trochlear ridge, transverse section, horse

Bone inflammation due to Coccidioides immitis in a dog

Metaphyseal osteopathy: "hypertrophic osteodystrophy"

Metaphyseal osteopathy

Panosteitis

Aseptic necrosis

Aseptic necrosis

Left cricoarytenoideus dorsalis muscle in a horse: denervation atrophy

Cytoarchitectural changes of degeneration

A - Vacuolar change: common cytoplasmic change

B - Internal nuclei: indication of chronic myopathic change

C - Whorled and ring fibres: whorls or rings of cytoplasm with internally located nuclei

Chronic myopathic change of muscle

Chronic myopathy

Muscular necrosis and dystrophic calcification at injection site

Degenerated and necrotic muscle tissue with disrupted myofibres

Segmental necrosis

Segmental necrosis and degeneration

Segmental necrosis

Ineffective regeneration of muscle due to basal lamina damage

Myotonia (channelopathies)

Malignant hyperthermia: defective ryanodine receptor

Degenerative myopathies

Compartment syndrome with coagulative necrosis

Toxic myopathy - necrosis

Exertional myopathy

Myositis ossificans

Bacterial myositis

Clostridial myositis

Pyogenic bacterial myositis

Inflammation of the muscle (granulomatous myositis)

Trichinella

Taenia

Taenia eggs

Cysticercus bovis

Taenia ovis cyst