Radiology Key

KEY FACTS Terminology • Endometriosis: Ectopic endometrial glands outside of uterine cavity • Endometrioma: Cystic collection of mixed blood products Imaging • Diffuse low-level internal echoes in 95% ○ Homogeneous…

KEY FACTS Terminology • Well-defined histology: Papillary and follicular carcinoma Imaging • Papillary carcinoma (~ 80% of thyroid cancer) ○ Majority are ill-defined with irregular outlines ○ 10-20% multifocal, 70%…

KEY FACTS Terminology • Viable pregnancy defined as one with potential for live birth • Nonviable pregnancy is one that will not result in live birth • Probable intrauterine pregnancy…

KEY FACTS Imaging • Pleomorphic adenoma ○ Most common parotid space tumor (80%) ○ Well defined, lobulated, solid, hypoechoic ○ Homogeneous internal echoes with posterior enhancement ○ Large tumors more…

KEY FACTS Terminology • Adnexal torsion is more accurate term than ovarian torsion, as torsion usually also includes fallopian tube Imaging • Ovary > 4 cm long or > 20…

KEY FACTS Imaging • Soft tissue mass in cervix: Hypoechoic or isoechoic ± necrosis • Hydro- or hematometra from cervical obstruction • Mass extending into upper vagina • MR is…

KEY FACTS Terminology • Open spina bifida (bone and skin defect ± sac) ○ Meningomyelocele: Sac + neural elements ○ Meningocele: Sac with fluid only ○ Myeloschisis: No sac (cord…

KEY FACTS Terminology • Hernia: Weakness or defect in fibromuscular wall with protrusion of organ or tissue through defect Imaging • Midline hernias ○ Epigastric: Between xiphisternum and umbilicus ○…

KEY FACTS Imaging • Interstitial ectopic : Implantation in portion of tube crossing myometrium at cornua of uterus ○ Eccentrically located with respect to endometrial cavity ○ Bulges cornua of…

KEY FACTS Terminology • Microbial infection of subcutaneous tissue (cellulitis), muscle (myositis), tendon (tenosynovitis), or fascia (fasciitis) • Abscess is focal fluid collection containing suppurative inflammatory material Imaging • Cellulitis…