[CIS PIDD] [cis-pidd] Unusual case of combined immunodeficiency with normal numbers of CD4 and CD8 cells
CIS-PIDD
cis-pidd at lists.clinimmsoc.org
Tue Jun 28 16:08:00 EDT 2016
We are seeing a 6-month old boy, born at term and previously healthy, until he developed progressive tachypnea beginning at age 5 months. He is a beautiful-looking baby without dysmorphic features, and with normal teeth , nails and hair. He was eventually noted to have a severe diffuse interstitial pneumonia and pneumocystis was identified by bronchoscopy. We assumed that he had SCID and started a work-up with an unexpected combination of results because he has normal numbers of CD4 and CD8 Tcells:
WBC 8540 with 59% lymphs (5038), 37% PMNs, and 5% monos
Over the course of hospitalization , has had WBC as high as 24,440 with 82% lymphs though both WBC and ALC have since returned nearly to above baseline
56% CD3
26% CD4 (2729)
27% CD8
36% CD19
36% CD20
5% CD16/56
IgG 409
IgA <7
IgM 92
HIV PCR negative.
I had originally considered X-linked hyper-IgM as a possible explanation for normal T cell numbers, the immunoglobulin, and PCP.
However, have just finished mitogen assay with another unexpected result for a patient with completely normal T cell numbers:
Stimulus Patient Control
Unstim 146 + 90 185 + 50
PHA 691 + 329 141,710 + 14,498
Con A 422 + 229 53,231 + 474
SpA 338 + 3 14,388 + 4,270
We also know that he has normal MHC class -I expression, but the sample was QNS for class-II expression.
TRECs were not done since he was born before Maryland started screening for SCID, but we will get that done this week.
Are there any tests that people can suggest that will direct the next stages in the work-up, or should we simply charge ahead with a whole exome (or whole genome) sequence?
Howard
Howard M. Lederman, M.D., Ph.D.
Professor of Pediatrics, Medicine and Pathology
Division of Pediatric Allergy and Immunology
Johns Hopkins Hospital - CMSC 1102
600 N. Wolfe Street
Baltimore, MD 21287-3923
Phone: 410-955-5883
Fax: 410-955-0229
Email: Hlederm1 at jhmi.edu<https://mobile.johnshopkins.edu/OWA/redir.aspx?C=02aee18ab96e42ab8cb61c09ecb79487&URL=mailto%3aHlederm1%40jhem.jhmi.edu>
WARNING: E-mail sent over the Internet is not secure.
Information sent by e-mail may not remain confidential.
DISCLAIMER: This e-mail is intended only for the
individual to whom it is addressed. It may be used only in accordance with applicable laws. If you received this e-mail by mistake, please notify the sender and destroy the e-mail.
---
You are currently subscribed to cis-pidd as: pagid at list.clinimmsoc.org.
To unsubscribe click here: http://cts.dundee.net/u?id=96396833.5a9591ccd1e327fe6bc4d1543298c482&n=T&l=cis-pidd&o=3718760
or send a blank email to leave-3718760-96396833.5a9591ccd1e327fe6bc4d1543298c482 at lyris.dundee.net
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist7.pair.net/pipermail/pagid/attachments/20160628/c2c85cf0/attachment-0001.html>
More information about the PAGID
mailing list