Benign Flashcards
Imaging features to distinguish desmoids from sarcoma
none
Association of desmoids with which condition
FAP
Tend to occur in prior surgical sites intra-abdominally
Courvoisier’s sign
palpable gallbladder with painless jaundice (pancreatic malignancy)
Recommended BED for keloid
BED2 of at least 60 Gy (can be obtained with 4x5)
Brooker class I heterotopic ossification
islands of bone within soft tissues
Brooker class II heterotopic ossification
bone spurs from pelvis or proximal femur with >1cm between opposing surfaces
Brooker class III heterotopic ossification
Bone spurs from pelvis or proximal femur reducing space between the opposing bone surfaces to <1 cm
Brooker class IV heterotopic ossification
Bone ankylosis of the hip
Ideal time for RT for heterotopic ossification
4 hours pre surgery to 72h post surgery
Best strategy to reduce gynecomastia and breast pain on bicalutamide
Tamoxifen but RT also an acceptable option
Dose of tamoxifen used for gynecomastia prevention
10 mg
Doses of RT used for gynecomastia prevention
- 12 Gy x 1
- 10 Gy x 1
- 4 Gy x 3
Control rates of desmoid tumors with RT alone
80% (sig better than surgery alone)
What drug can be used to prevent heterotopic ossification
indomethacin (25 mg TID x 5-6 weeks)
Dose of RT used for heterotopic ossification
7-8 Gy x 1
Ideal treatment for desmoid tumors
surgical resection
Share of paragangliomas in head and neck which produce catecholamines
5% (similar to pheos - most common presentation is HTN)
Glomus tumor
aka paraganglioma, benign, slow growing of the carotid artery, middle ear
Outcomes of RT for glomus tumors
Good local control (90%)
Relatively modest reduction (30%)
When should postop RT begin for keloid
24-48 hours post surgery
Setup for gynecomastia prevention
En face electrons using 10 cm circular block around nipple. No bolus.
Rule of thumb for 80% IDL for electrons
E/3
Recommended RT dose for desmoids
50-56Gy
Location for best outcomes in desmoids
abdominal wall
