OITE 2020 Flashcards
Myxoid liposarc
- Met pattern
- Translocation
- Trt
Atypical met pattern: lungs, bone (spine), retroperitoneum
t(12;16)
Rad + surg
Synovial sarcoma
- Fusion protein
- Translocation
- XR findings
- Trt
SYT/SSX fusion protein
t(X;18)
Ca deposits on imaging
Chemo!!! + rads + surg
Pl insertion
Medial cuneiform + base 1st MT
Anterior tarsal tunnel syndrome
- Nerve involved
- Trt
Medial or lateral br DPN (either!)
1. Remove dorsal osteophytes
2. If evidence of decreased motion/joint space, fuse TN joint
Advantage of Lis Franc fusion > ORIF
Less reop (less prominent hardware w/ fusion)
No diff outcomes, patient satisfaction, complications
Achilles treatment by defect size
<2cm - direct repair
2-5cm - V-Y advancement
>5cm - turndown +/- allograft recon
Name the tumor:
+CD19/20
Small round blue cell
Lymphoma
Name the tumor/treatment:
- Snake swallowing egg on MRI
- Antoni A/B histo
Schwannoma - benign
Marginal resection
Osteosarcoma
- Additional imaging
- What is Enneking stage if no mets
- Treat
CT chest - mets to chest
No mets = st 2B
Trt: chemo - surg (limb salvage) - chemo
Chemo: doxorubicin, cisplatin, MTX
Name the tumor:
- CSF1 mutation
PVNS
Only use CSF1 inhibitor therapy for recurrent or unresectable disease
+Wartenburg sign is weakness of what muscle
3rd palmar interosseous (abductor)
Unopposed action of ext digit quinti (radial n)
Remember
Dorsal interossei are adductors (ulnar n)
What effect does growing rods have on the pulmonary parameters of kids with early onset scoli?
Increase FVC only
What is the posterior lever push test?
IR + post translation so you can see SS insertion during a scope
Name structures at risk for elbow portals:
- Prox ant-med
- Ant-med
- Prox ant-lat
- Ant-lat
- Prox post-lat
- Prox ant-med : MABC / median
- Ant-med: MABC / median
- Prox ant-lat : radial/PABC
- Ant-lat : PIN / PABC
- Prox post-lat : M/PABC
What is blocking your Seymour fracture reduction?
Displaced distal phalanx physeal frx (open!!)
Nail matrix blocks you
<24h - reduce + abx
>24h - OR I&D, nailbed repair, abx
Whats the problem:
Can hold finger in extension after passive placement
Can’t actively extend MCP joint
Sagittal band insuff
Extensor subluxates to the side of the intact band
Passive extension centralizes the tendon - can hold extension (vs tendon rupture)
Acute: relative motion splint
Delay: repair vs recon
Describe the medium for the following:
- Mycobacterium marinum
- Mycobaterium TB
- Neisseria gonorrhoeae
MM: Lowenstein Jensen 30C
MTB: LJ 37C (core body temp)
NG: Thayer Martin (no specific temp needed)
Treat subungual hematoma w/o frx
Trephine the nailbed to release hematoma
No need to remove nail without nailbed lac
FAITH trial: SHS has what higher complication than screws for displaced FNF
SHS higher AVN
SHS w/ smokers or basicervical frxs have lower reop rates w/ SHS (vs screws)
Main medial knee stabilizer in full extension
Post oblique ligament
dMCL Xs rotatory stress
sMCL Xs valgus (esp in flexion)
Treat Candida PJI
IV fluconazole»_space; voriconazole or ampho B
Most frequent complication with open pantalar dislocation
AVN without collapse
Not post traumatic arthritis or infection
Mutation, inheritance Juvenile Paget
Hereditary hyperphosphatasia
AR
OPG inactivation
OPG is a RANLK decoy
So uninhibited RANKL - more bone turnover
High alk phos
+Bisphos
Tell the difference between osteofibrous dysplasia and adamantinoma
HISTO
OFD
- Anterior cortex tibia, painful
- Rimming osteoblasts
- Observation if no sx
Adaman
- Mixed lytic and blastic
- More aggressive on imaging + histo
- Histo: epithelial glands in bone (keratin+)
- Trt: wide resection + recon (malignant)
