Ch. 11 Skull Pathology Flashcards
disruptions in the continuity of bones of the skull
skull fractures
fractures of the skull that may appear as jagged or irregular lucent lines that lie at right angles to the axis of the bone
linear fractures
a fragment of bone that is separated and depressed into the cranial cavity can occur
depresses (ping-pong) fracture
fractures through the dense inner structures of the temporal bone. these are very difficult to visualize
basal skull fractures
new and abnormal growth
neoplasm
primary malignant neoplasms that spread to distant sites via blood and the lymphatic system
metastases
destructive lesions with irregular margins
osteolytic
proliferative bony lesions of increased density (brightness)
osteoblastic
“moth-eaten” appearance of bone
combination of osteolytic and osteoblastic
condition in which one or more bone tumors originate in the bone marrow
multiple myeloma
investigated primarily by CT and MRI radiographically may demonstrate enlargement of the sella turcica and erosion of the dorsum sellae, often as an incidental finding
pituitary adenomas
disease of unknown origin that begins as a stage of bony destruction followed by bony repair. lucency resembles destructive stage adn “cotton-wool” resembles reparative stage
paget disease (osteitis deformans)
bacterial infection of the mastoid process that can destroy the inner part of the mastoid process, often results from middle ear infections, mastoid air cells are replaced with a fluid-filled abscess, which can lead to progressive hearing loss
acute mastoiditis
a benign, usually slow-growing tumor of the auditory nerve sheath that originates in the internal auditory canal. symptoms include hearing loss, dizziness, and loss of balance
acoustic neuroma
benign, cystic mass or tumor that is most common in the middle ear. occurs due to a congenital defect or chronic otitis media. may destroy surrounding bone, which can lead to serious complications, including hearing loss
cholesteatoma
