MSK Re-Up #7 (Foot, Hip, Spine) Flashcards
What is neuropathic (charcot) arthropathy?
What are some symptoms of chronic condition?
-Joint damage and destruction as a result of peripheral neuropathy from DM, PVD, or other diseases.
Joint or foot deformity, alteration of shape of the foot, ulcer or skin changes.
What is seen on radiographs for neuropathic arthropathy?
-Obliteration of the joint space, disorganization of the joint.
-Decreased sensation and repetitive micro trauma leads to bone resorption and weakening.
Treatment for neuropathic arthropathy
-Surgery is rarely performed
-Rest, non-weightbearing, accommodative footwear
Interdigital (Morton’s) Neuroma is compressive neuropathy of the interdigital nerve. What are some risk factors for this?
Where does this pain normally occur?
-Women 25-50 if they wear tight-fitting shoes, high heels, or have flat feet
-Lancinating or burning pain with weight bearing. MC in the third intermetatarsal space (between 3rd and 4th metatarsals).
Treatment for a Morton’s Neuroma
-Conservative: broad-toed shoes with firm soles
-Steroid injections
-Surgery if refractory or failed conservative
What is a Jones Fracture?
What is a common complication of this?
Transverse fracture through the diaphysis of the fifth metatarsal at the metaphyseal - diaphyseal junction
Risk of nonunion or malunion because it involves the vascular watershed area.
What is the treatment for a Jones Fracture?
-NWB in short leg cast x 6-8 weeks
-Frequently requires ORIF/pinning
On the other hand, what is a PseudoJones Fracture?
What is the treatment?
-Fracture through the base (tuberosity) or the fifth metatarsal
-Much more common and less serious than a Jones Fracture
-Walking cast x 2-3 weeks
What is the LisFranc joint?
Bases of the first three metatarsal heads and their respective cuneiforms
what is a LisFranc injury and how does it occur?
One or more of the metatarsal bones are displaced from the tarsus
Disruption between articulation of medial cuneiform and base of the second metatarsal, leading to ligamentous injury or fracture
What can be seen on radiographs for a LisFranc injury that is pathognomonic for this condition?
What is the treatment?
Fleck Sign: fracture at base of second metatarsal
ORIF followed by NWB cast for 12 weeks
Where does a herniated disc (nucleus pulposus) normally occur and why?
What are some symptoms of this condition?
L5-S1 because it is the junction between the mobile and non-mobile spine
Radicular back pain: unilateral, may radiate down the leg with paresthesias or numbness in a dermatomal pattern.
-Positive Straight Leg Raise, Crossover Test
If the herniated disc is at L4:
-Sensory
-Weakness
-Reflex Diminished
-Sensory: Anterior thigh pain, sensory loss to medial ankle
-Weakness: Ankle Dorsiflexion
-Reflex Diminished: Loss of Knee Jerk
If the herniated disc is at L5:
-Sensory
-Weakness
-Reflex
-Sensory: lateral thigh/leg, hip groin pain and dorsum of foot
-Weakness: Big Toe Extension (Dorsiflexion)
-Reflexes usually normal
If the herniated disc is at S1:
-Sensory
-Weakness
-Reflex
-Sensory: Posterior leg/calf pain, plantar surface of foot
-Weakness: Plantarflexion
-Reflex: Loss of ankle jerk
What is the DOC for a herniated disc?
Treatment?
MRI
Conservative initially: NSAIDs + continuation of ordinary activities as tolerated.
-Steroid injections if refractory to first line therapy
-Laminectomy if disabling pain > 6 weeks or not responsive to conservative care
Cauda Equina Syndrome is considered a neurosurgical emergency. What is the MC etiology for this?
Name the symptoms of this condition
-Lumbar disc herniation
-Back pain + 1 of the following
–Radiculopathy: bilateral leg radiation of pain
–Saddle Anesthesia, Erectile Dysfunction
–New onset urinary or bowel retention or incontinence
–Decreased anal sphincter tone
DOC of choice for cauda equine syndrome?
What is the treatment?
MRI
Emergent decompression
What are etiologies of a vertebral compression fracture (think about in kids or elderly)
Symptoms
-Children from jumping/falling from height
-Elderly from osteoporosis, malignancy, or systemic illness
Localized back pain with focal midline tenderness at level of fracture
What is seen on radiographs for a vertebral compression fracture?
Loss of vertebral height
Lumbar spinal stenosis is ….
What are some common etiologies of this condition?
-narrowing of the spinal canal with impingement of the nerve roots
-Degenerative arthritis or Spondylolysis MC especially if > 60 years old