Muscle/Tendon Injuries & Bone Tumors Flashcards
The stretching or tearing of a ligament is a ____.
Sprain
True or False: Ligaments heal slowly.
TRUE
Sprains take about ___-___ weeks for initial healing.
6-10 weeks
Sprains take about ___-___ months for maximal stability to develop.
3-6 months
Put the following in order from best to worst, in terms of a strain: 1st, 2nd, 3rd.
1st –> 2nd –> 3rd
A second degree sprain is the ___ disruption of a ligament.
Partial
A third-degree sprain is complete ___, ___, or avulsion of ligament from bone.
A third-degree sprain is complete RUPTURE, LACERATION, or avulsion of ligament from bone.
With which type of sprain is function completely lost?
Third-degree
Vigorous treatment is needed to restore function from a third-degree sprain. Spontaneous healing by ____ often leads to an unstable joint.
Fibroplasia
____ tissue healing is no where near as strong as ligamentous tissue.
Scar tissue
Which of the ligament suture patterns place knots at the cut surface may prevent complete healing: Far-near-near-far, Bunnell-Mayer technique, 3-loop pulley, Locking loop?
- Bunnell-mayer technique
2. Locking loop
A sprain involving complete loss of function is what degree of sprain?
3rd
What is: a bruise of the muscle with varying degrees of hemorrhage and fiber disruption?
Muscle contusion
What is: a longitudinal stretching or tearing of muscle fibers or groups of fibers?
Strain
What is: a partial or complete sharp transection or a tendon or muscle?
Laceration
Categorize the following as a 1st, 2nd, or 3rd degree strain: Minimal lameness and minimal pain or swelling.
1st degree (mild)
Categorize the following as a 1st, 2nd, or 3rd degree strain: obvious lameness, significant soft tissue swelling, rapid progressive pain.
3rd degree (severe)
Categorize the following as a 1st, 2nd, or 3rd degree strain: obvious lameness, soft tissue swelling, pin point pain.
2nd degree (moderate)
The majority of acute, mild-moderate strains resolve with ___ ___.
Conservative management
What are 4 examples of conservative management for a strain?
- NSAIDs
- Rest
- Ice packing
- Warm packing
What are the clinical signs associated with a 3rd degree strain?
Unable to actively flex/extend a joint or even stand
What type of treatment would a 3rd degree strain require?
- Surgical repair
2. External support during healing
In treating a 3rd degree strain, you aim for apposition of the muscle or tendon. Minimal gap and tension = ___ ___.
Less scar
If too much scar tissue forms, ___ may occur.
Contracture
What are the 5 components of the common calcaneon tendon?
- Gastrocnemius tendon
- Superficial digital flexor tendon
- Tendon of biceps femoris muscle
- Tendon of semitendinosis muscle
- Tendon of gracillis muscle
What is the difference between a gastrocnemeus tendon tear alone and a tear of all the tendons of the common calcaneon?
Gastroc tear only = bear claw
All tendon tear = flat foot
What are the 3 radiographic signs of a strain?
- Soft tissue swelling in the tendon region
- Mineralization in tendon
- Periosteal reaction on tuber calcaneus
What are the 2 clinical signs of a gastrocnemius tendon rupture?
- Dropped hock
2. Curling of the toes (“Bear claw” stance)
What are the 3 treatment strategies of a common calcaneon tendon strain?
- NSAIDS and enforced rest
- Surgical repair
- Spint or case (6-12 weeks)
Which type of contracture is IRREVERSIBLE?
Quadriceps muscle contracture (there is no cure)
What is the best treatment option for a contracted quadriceps muscle?
Amputation
What causes contracture of the quadriceps muscle?
Femur fracture, causing trauma to the quadriceps muscle and contracture of the vastus intermedius
___ ___ is very important in rehab after femur fracture repair.
Physical therapy
What are: neoplastic cells which arise from cells located within the bone tissue.
Primary bone tumor
Primary bone tumors are ___% of all canine neoplasias.
5%
Of those 5%, which is the most common type of primary bone tumor?
Osteosarcoma (>80%)
Osteosarcoma arises from ___ bone cells.
Mesynchymal
75% of osteosarcomas originate in the ____ skeleton.
Appendicular
What are the predilection sites for osteosarcoma?
Away from the elbow (proximal humerus & distal radius), towards the knee (distal femur & proximal tibia)
For osteosarcoma, metastasis is ___.
Common
With osteosarcoma, about ___% of patients have micrometastases.
90%
True or False: Osteosarcomas metastasize very early on in the disease.
TRUE
Which type of bones do chondrosarcomas affect?
Flat bones (rib, skull, the axial skeleton)
Chondrosarcomas are malignant and ___ to metastasize.
Slow
Which type of primary bone tumor is not responsive to chemotherapy?
Chondrosarcoma
Which bones do fibrosarcomas affect?
Axial skeletal bones
Fibrosarcomas are slow or fast to metastasize?
Slow
True or False: Excision of a fibrosarcoma is rarely curative.
FALSE: excision can be curative
Metastatic bone tumor: neoplastic cells originate from a ___ area.
Remote
What are the 2 common sites for metastatic bone tumors?
- Lumbar vertebrae
2. Pelvis
True or False: Primary bone tumors can cross the joint.
FALSE: primary bone tumors do NOT cross the joint.
What are the differential diagnoses to bone tumors? (6 listed here)
- Infection (osteomyelitis )
- Multiple myeloma
- Metastatic neoplasia
- Hypertrophic pulmonary osteopathy
- Trauma
- Aneurismal bone cysts
What are 4 ways to get a definitive diagnosis of bone tumor?
- Jamshidi biopsy
- Histopathology after amputation
- Fine needle aspirate
- Wedge biopsy
What is: aiming to provide comfort?
Palliative care
What is: aiming to remove all tumor cells from the body?
Curative intent
What are the 5 options for treatment of a primary bone tumor?
- Tumor excision (amputation)
- Tumor excision and chemotherapy
- Palliative radiation
- Palliative analgesia
- Euthanasia
True or False: Limb spare surgery does not improve survival time.
TRUE
What is chemotherapy used to treat and successful at treating?
Micrometastases
True or False: Chemotherapy prolongs survival.
TRUE
Palliative radiation is used to diminish ___ ___.
Bone pain
Does palliative radiation affect metastasis or median survival time?
No
What is the median survival time with palliative care of OSA in dogs?
3-5 months
What is the median survival time with curative intent of OSA in dogs?
10-14 months
In cats, ___-___% of bone tumors are osteosarcoma.
70-80%
What is the median survival time of a cat after diagnosis with osteosarcoma?
24 months
For osteosarcoma, is the prognosis better in dogs or cats?
Cats