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CNS Ring-Enhancing Lesions - Differential Diagnosis
 • Infections: Cerebral abscess (bacterial, fungal, parasitic), Neurocysticercosis, Tuberculoma, Cerebral
Ring-Enhancing Lesions ... usually multiple lesions ... lymphoma (usually solitary ... lesion) • Demyelinating ... Ring #Enhancing #Lesions
Solitary Pulmonary Nodule
Click here for more detailed information about Solitary Pulmonary Nodule
A solitary pulmonary nodule or
Solitary Pulmonary ... information about Solitary ... Pulmonary Nodule A solitary ... the size of the lesion ... Lesions smaller
CNS Ring-Enhancing Lesions - Immunocompromised vs Immunocompetent
Multiple Ring-Enhancing Lesions:
 • Toxoplasmosis (CD4 < 100)
 • Other
Ring-Enhancing Lesions ... Ring-Enhancing Lesions ... syndrome + MRI lesions ... and aspergillus Solitary ... Lesion: • CNS
Size
A solitary pulmonary nodule (SPN) is defined as a single intraparenchymal lesion less than 3 cm
Size A solitary ... intraparenchymal lesion ... A lesion greater ... made, because lesions ... while smaller lesions
Blanching Spider Angioma (Nevus) on Physical Exam

Spider angiomas are usually benign but often can be suggestive
Solitary spider ... is a vascular lesion ... The lesion contains ... as multiple or solitary ... lesions.
Solitary Cell Plasmacytoma

What?
• Plasma cell neoplasms can present as a single lesion (solitary plasmacytoma)
• In 3%
present as a single lesion ... space-occupying lesions ... extramedullary lesions ... lesion) • Bone ... impairment or of lytic lesions
Lung Nodule - Differential Diagnosis Algorithm
Nodule on > 2 Years Without a Change in Size:
 •
Malformation Solitary ... Metastases ("cannonball lesions
Multiple Myeloma and Monoclonal Gammopathies
C - HyperCalcemia- calcium > 11 mg/dL / >1 mg/dL the ULN
R
LLN B - Bony lesions ... 100 • >1 focal lesions ... , amyloidosis, solitary
Eosinophilic Granuloma (aka Langerhans Cell Histiocytosis) on Pediatric Skull X-Ray
Solitary, punched out lytic lesion, no sclerotic
Pediatric Skull X-Ray Solitary ... punched out lytic lesion
Whenever you see an area of increased density within the lung, it must be the result
space occupying lesion ... either solitary