Progressive multifocal leukoencephalopathy differential diagnosis

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Differentiating Progressive multifocal leukoencephalopathy from other Diseases[edit | edit source]

Progressive multifocal leukoencephelopathy (PML) is more common among immunocompromised patients who are at high risk for other fungal, bacterial, and viral infections. It should be differentiated from the following diseases:

Disease	Differentiating signs and symptoms	Differentiating tests
CNS lymphoma^[1]	Patient is immunocompetent Focal symptoms indicative of a mass lesion Seizure	Single solitary ring enhancing lesion on CT or MRI
Disseminated tuberculosis^[2]	Prior history of residence in an endemic area Chronic cough, weight loss, hemoptysis	PCR of CSF for tuberculosis Mycobacterial culture of CSF Brain biopsy for acid-fast bacilli staining Culture and acid stain positive for acid-fast bacilli CXR shows cavitations
Aspergillosis^[3]	Pulmonary lesions in addition to CNS lesions Symptoms may include cough, chest pain, and hemoptysis	CSF fungal culture, galactomannan
Cryptococcosis	Symptoms include cough, chest pain, and hemoptysis	Cryptococcal antigen from CSF and serum CSF fungal culture
Chagas disease^[4]	History of residence in Central or South America Acute infection is rarely symptomatic Encephalitis or focal brain lesions Myocarditis Chronic infections in immunocompromised patients develop into encephalitis with necrotic brain lesions causing a mass effect	Trypanosoma cruzi in blood, tissue, or CSF, PCR of tissue or body fluids, and serologic tests
CMV infection^[5]	Most common CNS opportunistic infection in AIDS patients Presents with encephalitis, retinitis, progressive myelitis, or polyradiculitis In disseminated disease, it involves both the liver and kidneys	Brain CT/MRI/biopsy: location of lesions is usually near the brain stem or periventricular areas PCR of CSF with detectable virus is diagnostic Brain biopsy with + staining for CMV or evidence of owl's eyes is also diagnostic, but it is rarely performed because of the location of brain lesions
HSV infection^[6]	Seizures, headache, confusion and/or urinary retention can be seen in disseminated disease, which usually affects only the immunocompromised or acute infections In pregnant women, it may be associated with concurrent genital/oral lesions; can be spread to the neonate during acute infection in the mother, or via viral shedding in the birth canal Neonatal HSV can range from localized skin infections to encephalitis, pneumonitis, and disseminated disease	Brain CT/MRI/biopsy: location of lesions is usually the medial temporal lobe or the orbital surface of the frontal lobe. PCR of CSF with detectable virus is diagnostic
Varicella Zoster infection^[7]	Multifocal involvement has subacute course, usually only in immunosuppressed, with headache, fever, focal deficits, and seizures. Unifocal involvement is more typically seen in immunocompetent hosts, occurring after contralateral cranial nerve herpes zoster, with mental status changes, TIAs, and stroke Disseminated varicella zoster virus can occur in adults during primary infection, presenting with pneumonitis and/or hepatitis Disease is a vasculopathy with hemorrhage and stroke	PCR of CSF with detectable virus is diagnostic
Brain abscess^[8]^[9]	Associated with sinusitis (abutting the sinuses) or with bacteremia Signs and symptoms includes fever and necrotizing brain lesions with mass effect	CSF culture or culture of brain abscess
Progressive multifocal leukoencephalopathy^[10]	Symptoms are often more insidious in onset and progress over months. Symptoms include progressive weakness, poor coordination, with gradual slowing of mental function. Only seen in the immunosuppressed. Rarely associated with fever or other systemic symptoms	PCR of CSF for JC virus Biopsy reveals white matter lesions and not well-circumscribed lesions.

References[edit | edit source]

↑ Gerstner ER, Batchelor TT (2010). "Primary central nervous system lymphoma". Arch. Neurol. 67 (3): 291–7. doi:10.1001/archneurol.2010.3. PMID 20212226.
↑ von Reyn CF, Kimambo S, Mtei L, Arbeit RD, Maro I, Bakari M, Matee M, Lahey T, Adams LV, Black W, Mackenzie T, Lyimo J, Tvaroha S, Waddell R, Kreiswirth B, Horsburgh CR, Pallangyo K (2011). "Disseminated tuberculosis in human immunodeficiency virus infection: ineffective immunity, polyclonal disease and high mortality". Int. J. Tuberc. Lung Dis. 15 (8): 1087–92. doi:10.5588/ijtld.10.0517. PMID 21740673.
↑ Latgé JP (1999). "Aspergillus fumigatus and aspergillosis". Clin. Microbiol. Rev. 12 (2): 310–50. PMC 88920. PMID 10194462.
↑ Rassi A, Rassi A, Marin-Neto JA (2010). "Chagas disease". Lancet. 375 (9723): 1388–402. doi:10.1016/S0140-6736(10)60061-X. PMID 20399979.
↑ Emery VC (2001). "Investigation of CMV disease in immunocompromised patients". J. Clin. Pathol. 54 (2): 84–8. PMC 1731357. PMID 11215290.
↑ Bustamante CI, Wade JC (1991). "Herpes simplex virus infection in the immunocompromised cancer patient". J. Clin. Oncol. 9 (10): 1903–15. doi:10.1200/JCO.1991.9.10.1903. PMID 1919640.
↑ Hambleton S (2005). "Chickenpox". Curr. Opin. Infect. Dis. 18 (3): 235–40. PMID 15864101.
↑ Alvis Miranda H, Castellar-Leones SM, Elzain MA, Moscote-Salazar LR (2013). "Brain abscess: Current management". J Neurosci Rural Pract. 4 (Suppl 1): S67–81. doi:10.4103/0976-3147.116472. PMC 3808066. PMID 24174804.
↑ Patel K, Clifford DB (2014). "Bacterial brain abscess". Neurohospitalist. 4 (4): 196–204. doi:10.1177/1941874414540684. PMC 4212419. PMID 25360205.
↑ Tan CS, Koralnik IJ (2010). "Progressive multifocal leukoencephalopathy and other disorders caused by JC virus: clinical features and pathogenesis". Lancet Neurol. 9 (4): 425–37. doi:10.1016/S1474-4422(10)70040-5. PMC 2880524. PMID 20298966.

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[pmid20212226-1] Gerstner ER, Batchelor TT (2010). "Primary central nervous system lymphoma". Arch. Neurol. 67 (3): 291–7. doi:10.1001/archneurol.2010.3. PMID 20212226.

[pmid21740673-2] von Reyn CF, Kimambo S, Mtei L, Arbeit RD, Maro I, Bakari M, Matee M, Lahey T, Adams LV, Black W, Mackenzie T, Lyimo J, Tvaroha S, Waddell R, Kreiswirth B, Horsburgh CR, Pallangyo K (2011). "Disseminated tuberculosis in human immunodeficiency virus infection: ineffective immunity, polyclonal disease and high mortality". Int. J. Tuberc. Lung Dis. 15 (8): 1087–92. doi:10.5588/ijtld.10.0517. PMID 21740673.

[pmid10194462-3] Latgé JP (1999). "Aspergillus fumigatus and aspergillosis". Clin. Microbiol. Rev. 12 (2): 310–50. PMC 88920. PMID 10194462.

[pmid20399979-4] Rassi A, Rassi A, Marin-Neto JA (2010). "Chagas disease". Lancet. 375 (9723): 1388–402. doi:10.1016/S0140-6736(10)60061-X. PMID 20399979.

[pmid11215290-5] Emery VC (2001). "Investigation of CMV disease in immunocompromised patients". J. Clin. Pathol. 54 (2): 84–8. PMC 1731357. PMID 11215290.

[pmid1919640-6] Bustamante CI, Wade JC (1991). "Herpes simplex virus infection in the immunocompromised cancer patient". J. Clin. Oncol. 9 (10): 1903–15. doi:10.1200/JCO.1991.9.10.1903. PMID 1919640.

[pmid15864101-7] Hambleton S (2005). "Chickenpox". Curr. Opin. Infect. Dis. 18 (3): 235–40. PMID 15864101.

[pmid24174804-8] Alvis Miranda H, Castellar-Leones SM, Elzain MA, Moscote-Salazar LR (2013). "Brain abscess: Current management". J Neurosci Rural Pract. 4 (Suppl 1): S67–81. doi:10.4103/0976-3147.116472. PMC 3808066. PMID 24174804.

[pmid25360205-9] Patel K, Clifford DB (2014). "Bacterial brain abscess". Neurohospitalist. 4 (4): 196–204. doi:10.1177/1941874414540684. PMC 4212419. PMID 25360205.

[pmid20298966-10] Tan CS, Koralnik IJ (2010). "Progressive multifocal leukoencephalopathy and other disorders caused by JC virus: clinical features and pathogenesis". Lancet Neurol. 9 (4): 425–37. doi:10.1016/S1474-4422(10)70040-5. PMC 2880524. PMID 20298966.

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