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Undefined CD4 lymphocytopenia without clinical complications. A report of two cases
G Cascio1, A M Massobrio, B Cascio
1Department of Internal Medicine, University of Turin, Italy.
Insights
Idiopathic CD4 lymphocytopenia (ICL) is a rare condition. This study presents two cases with CD4 deficiency, highlighting their unique immunological profiles and mild clinical symptoms, which do not fully meet CDC diagnostic criteria.
Area of Science:
- Immunology
- Hematology
Background:
- Idiopathic CD4 lymphocytopenia (ICL) is a condition characterized by a low count of CD4+ T-lymphocytes without a clear cause.
- Diagnostic criteria for ICL have been established by the Centers for Disease Control (CDC).
- Previous reports have suggested associations between ICL and hepatitis C infection or similarities to common variable immunodeficiency (CVI).
Observation:
- This paper details the immunological findings in two patients with confirmed CD4 lymphocytopenia.
- Both patients exhibited minimal clinical manifestations and no opportunistic infections.
- Neither patient presented with other significant cellular or humoral immunity abnormalities.
Findings:
- Patient one showed negative serology and no hypergammaglobulinemia, ruling out HIV infection.
- Patient two has not required specific treatment.
- The presented cases partially meet, but do not fully satisfy, the CDC's diagnostic criteria for ICL.
Implications:
- These cases expand the understanding of the spectrum of idiopathic CD4 lymphocytopenia.
- Further long-term follow-up is necessary to determine the natural history of these atypical ICL presentations.
- The findings suggest that ICL may present with varied immunological and clinical profiles.
Abstract:
A form of idiopathic CD4 lymphocytopenia (ICL) has been recently described. Its diagnostic criteria have been defined by the Centers for Disease Control (CDC), Atlanta. Associations of ICL with hepatitis C infection have been reported, while some ICL patients have presented abnormalities partly similar to those observed in common variable immunodeficiency (CVI). This paper illustrates the immunological pictures of two subjects with a CD4 deficiency confirmed in a series of peripheral blood lymphocyte subset determinations, but not associated with other cellular or humoral immunity abnormalities and accompanied by poorly significant clinical manifestations (no opportunistic infections). Patient one has been observed for a very long period. Her serological picture has been negative and she is free from hypergammaglobulinemia. HIV infection can thus be ruled out. Patient two has not required any specific treatment so far. The CDC's diagnostic criteria for ICL are not fully met in the two cases. Their pictures meet many, though not all of the CDC criteria for the diagnosis of ICL. It is to be hoped that a protracted follow-up will allow an assessment to be made of the natural history of the two cases.