15 results
Air Crescent Sign on Chest CT
 • Crescentic or circumferential rim of radiolucent airspace within a
Air Crescent Sign ... consolidation or nodular ... #Sign #CT #Lung ... #Pulmonary #diagnosis ... #radiology #clinical
Spondylolysis & Spondylolisthesis: Pathogenesis and Clinical Findings

Pars interarticularis stress fracture (spondylolysis) - most frequently in the
Pathogenesis and Clinical ... vertebrae • CT ... - collar appearance ... Spondylolisthesis #MSK #diagnosis ... #pathophysiology
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Nodular LCH: - Sarcoidosis ... : 'signet ring sign ... central dot. - LIP #Clinical ... #Diagnosis #Radiology ... #Differential #Comparison
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
emboli usually present ... CT demonstrates ... can suggest the diagnosis ... feeding vessel sign ... #Clinical #Radiology
Periorbital Cellulitis: Pathogenesis and Clinical Findings
Definitions:
a. Dacryoadenitis: infection of the lacrimal glands
b. Conjunctivitis: inflammation of the
Pathogenesis and Clinical ... normal: - extra-ocular ... patient NEEDS a CT ... #ophthalmology ... #diagnosis #signs
Orbital Cellulitis: Pathogenesis and Clinical Findings
Definitions:
a. Chemosis: Edema of the bulbar conjunctiva
b. Panopthalmitis: inflammation of all
Pathogenesis and Clinical ... Impaired extra-ocular ... Orbital #Cellulitis #pathophysiology ... #ophthalmology ... #diagnosis #signs
Emphysematous Cystitis
Epidemiology:
 • Usually middle-aged diabetic women
 • Other RF: neurogenic bladder, urinary tract outlet obstruction,
immune compromise Clinical ... Signs/Symptoms: ... or signs of infection ... Pathophysiology: ... , specifically CT
Atoll Sign (Reverse-Halo Sign) on Chest CT
 • Central GGO surrounded by a crescentic or circumferential
CT • Central GGO ... surrounded by a crescentic ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Acute Closed Angle Glaucoma: Pathogenesis and Clinical Findings
OPHTHALMIC EMERGENCY: Early detection is essential, but most patients
Pathogenesis and Clinical ... -> crowding of ocular ... damage & blindness Signs ... ClosedAngle #Glaucoma #pathophysiology ... #ophthalmology
Ocular Globe Rupture on POCUS

A patient presents with eye pain and is unable to open his
Ocular Globe Rupture ... rupture ("flat tire sign ... " on CT) #Globe ... #Ophthalmology ... #clinical #ultrasound