Musculoskeletal Flashcards
At what age should you begin ordering dexa scans for male patients? For female patients?
70 for males, 65 for females
Give the DEXA score for osteopenia and osteoporosis
Osteopenia = 1 to 2.4 standard deviations, osteoporosis = 2.5 standard deviations or greater
What fracture is the #1 cause of compartment syndrome?
Tibial shaft fracture
A patient’s lab work shows positive Smith antibody and positive double-stranded DNA antibodies. What is the most likely diagnosis?
Lupus
Where are Bouchard’s nodes found?
Proximal interphalangeal joint (PIP)
What will an xray show in acute osteomyelitis?
Nothing.
It will show bone destruction in chronic osteomyelitis
What is the best imaging to diagnose osteomyelitis?
Either a bone scan or an MRI will provide the diagnosis
A 22 year old male patient presents with what is clearly a septic knee. You also notice lesions on his hands and feet. What is the most likely pathogen?
Neisseria gonorrhoeae
What would you expect the WBC count to be in the joint fluid of an infected knee?
> 50,000 at a minimum and probably much higher
A patient presents with a painless mass in her right wrist. What is the most likely diagnosis?
Ganglion cyst
What is the age range for osteosarcoma? Where are they most typically found in the body?
Osteosarcoma usually occur in 15-25 year old males and are most commonly found around the knee
You think a patient may have an osteoid osteoma due to his complaints of severe night pain. You set him up for an xray. But in the meantime, what medication do you start him on?
If it is truly an osteoid osteoma, ibuprofen will resolve his pain.
Clicking or locking of the knee indicates what diagnosis?
Meniscal tear
A 65 year old presents complaining of severe pain in his great toe that began when he woke up this morning. It is swollen, red and very tender. What is the most likely diagnosis?
Gout would be number one bc of the location, but you might also think about an infection
What uric acid level helps to confirm a diagnosis of gout?
> 7.5
What is the medical treatment for gout?
Allopurinol, colchicine
A pathology report comes back with positive birefrigent crystals. What is the most likely diagnosis?
Pseudogout
A patient with a history of hepatitis B presents complaining of bilateral knee pain, fever, and weight loss. What is the most likely diagnosis?
Polyarteritis nodosa
You suspect a patient has polyarteritis nodosa. What is the test for a definitive diagnosis and what is the treatment?
Biposy, high dose steroids
On physical exam, you notice ulnar deviations and swan neck deformities. What is the most likely diagnosis?
Rheumatoid arthritis
A positive Neer’s test indicates what diagnosis?
Rotator cuff impingement
List three medications that may cause lupus
Procainamide, isoniazid, and Quinidine
What test do you do for Sjogren’s syndrome?
Schirmer test
A patient with rheumatoid arthritis is heading to the OR for an open reduction and internal fixation of the ankle. In addition to ankle films, what other xrays should you get?
C-spine. Anesthesia will want them due to concerns about instability of C1 and C2.
Which carpal bone has a high rate of nonunion and occult fracture?
Scaphoid
What medication is used for patients with lupus?
Systemic steroids
Scleroderma limited version has 5 main characteristics for which the CREST acronym is often used. What are those 5 things?
Calcinosis, Raynaud’s, Esophageal dysmotility, sclerodactyly, telangiectasia
This is a sunburst appearance on xray. What is the most likely diagnosis?
Osteosarcoma
Anatomically where are 80% of clavicle fractures located?
Middle third
A pathology report comes back showing negatively birifringent crystals. What is the most likely diagnosis?
Gout