boards Flashcards
What are T1 bright substances in imaging?
Fat and hemorrhage
Fat saturation sequences are used to differentiate between them.
What is a lymphatic malformation characterized by?
Complex cystic solid structure
What condition is associated with nodules in the trachea and small cystic/solid nodules in lower lobes?
Tracheobronchial papillomatosis
Usually due to HPV, often acquired during birth.
What mutation is associated with a poor prognosis in midline glioma?
H3K27 mutation
What are the characteristics of a hyperechoic renal mass on ultrasound?
Angiomyolipoma or renal cell carcinoma
What does a progressively enhancing intrahepatic mass with central enhancement indicate?
May represent:
* Intrahepatic cholangiocarcinoma (solitary mass with infiltrating margins and associated intrahepatic biliary ductal dilatation)
* Epithelioid hemangioendothelioma (usually composed of multiple peripheral masses)
* Hepatocellular carcinoma (arterial enhancement, washout on delayed phases )
What is the imaging feature of pheochromocytoma?
Extremely high T2 signal adrenal lesion
How does myelolipoma appear on fat suppression images?
Hypointense
What are the key features of adenomyosis?
Uterine enlargement, irregular margins of endometrial myometrial interface, diffuse heterogeneity including microcyst formation
What is the most common extratesticular neoplasm?
Lipoma
What is the most common neoplasm of the epididymis?
Adenomatoid tumor
What type of tumor has the best prognosis in osteosarcoma?
Parosteal osteosarcoma
Where does parosteal osteosarcoma typically occur?
On long bone metaphyseal surface
What is the most common subtype of liposarcoma?
Well differentiated liposarcoma
Where does chondroblastoma typically occur?
Epiphysis or apophysis of skeletally immature patient
What are the two types of femoroacetabular impingement?
CAM type and Pincer type
What is another name for tenosynovial giant cell tumor?
Pigmented villonodular synovitis (PVNS)
What is the earliest sign of impending articular surface collapse in avascular necrosis?
Crescent sign
What does thymic rebound appear as on imaging?
Chevron pattern over mediastinum in post chemo patients
What is the most common type of benign and malignant cardiac tumor?
Myxoma is benign, sarcoma/angiosarcoma is malignant
What does CPT stand for in medical terminology?
Current Procedural Terminology
What is SNOMED clinical terms used for?
Computer processable terms for clinical documentation and reporting
What does ICD stand for?
International Classification of Diseases
What does DRG stand for?
Diagnosis Related Group
