Heterotopic Ossification Prophylaxis Updated by Jing Zeng and Michael J. Swartz BACKGROUND What is heterotopic ossification (HO)? HO refers to abnl bone formation outside the skeleton. It often appears after…

Hemangiopericytoma and Solitary Fibrous Tumors Updated by Boris Hristov BACKGROUND Are hemangiopericytomas benign or malignant lesions? Hemangiopericytomas are considered malignant lesions (sarcomatous lesions associated with blood vessels). What is the…

Superior Vena Cava Syndrome Updated by Delnora L. Erickson and Bronwyn R. Stall BACKGROUND What vessels form the SVC? The right and left brachiocephalic veins join to form the SVC….

Vestibular Schwannoma/Acoustic Neuroma Updated by Sarah McAvoy BACKGROUND What is the cell of origin for vestibular schwannomas and acoustic neuromas (ANs)? The Schwann cell of the myelin sheath is the…

Urethral Cancer Updated by Reid F. Thompson BACKGROUND What is the estimated annual incidence of urethral cancer in the U.S.? ~500 cases/yr of urethral cancer in the U.S. Is there…

Ovarian Cancer Updated by Surbhi Grover BACKGROUND In the U.S., where does ovarian cancer rank as a cause of cancer death in women? In the U.S., epithelial ovarian cancer (EOC)…

Pituitary Tumor Updated by Emma B. Holliday BACKGROUND What is the % of pituitary tumors in relation to all primary brain tumors? ~10%–15% of all diagnosed primary brain tumors are…

Desmoid Tumors Updated by William K. J. Skinner and Deborah A. Frassica BACKGROUND What are desmoid tumors (DT)? DTs are rare, benign, slow-growing fibroblastic neoplasms that arise from musculoaponeurotic stromal…

Metastatic Prostate Cancer Updated by Phillip J. Gray BACKGROUND What % of newly diagnosed prostate cancer pts present with advanced Dz? ~10%–20% of pts present with advanced Dz (local and/or…

Low-Risk Prostate Cancer Updated by Anand Background What is the annual incidence and mortality of prostate cancer in the U.S.? ~24,0000 Dx of and ~30,000 deaths from prostate cancer annually…