Please sign in to follow a disease.
Rh deficiency syndrome
MONDO:0019107The Rh deficiency syndrome, also known as Rh-null syndrome, is a blood disorder where people have red blood cells (RBCs) lacking all Rh antigens. The Rh antigens maintain the integrity of the RBC membrane and therefore, RBCs which lack Rh antigens have an abnormal shape. There are two types of Rh deficiency syndrome: The regulator type is associated with many different changes (mutations) in the RHAG gene. The amorph type is caused by inactive copies of a gene (silent alleles) at the RH locus. As a result, the RBCs do not express any of the Rh antigens. The absence of the Rh complex alters the RBC shape, increases its tendency to break down (osmotic fragility), and shortens its lifespan, resulting in a hemolytic anemia that is usually mild. These patients are at risk of having adverse transfusion reactions because they may produce antibodies against several of the Rh antigens and can only receive blood from people who have the same condition. Rh deficiency syndrome is inherited in an autosomal recessive manner. Management is individualized according to the severity of hemolytic anemia.
Also known as: Rh deficiency syndrome, Rh-null syndrome, anemia, hemolytic, Rh-null, regulator type, RH-null, regulator type, RHN, RHNR, Rh-Mod, Rh-null disease
40 clinical trials for this condition and its sub-types.
Follow this condition — get notified about new trialsBroader categories
-
New drug aims to stop transplant attack on the body
Disease control OngoingThis phase 2 trial tests whether the drug itacitinib, given with standard care, can prevent graft-versus-host disease (GVHD) in people who receive a donor stem cell transplant for blood cancers. GVHD happens when the donor cells attack the patient's body. The study includes 31 ad…
Phase: PHASE2 • Sponsor: M.D. Anderson Cancer Center • Aim: Disease control
Last updated Jun 27, 2026 12:08 UTC
-
New blood treatment could block zika in transfusions
Disease control OngoingThis study tests a special treatment for red blood cells that aims to kill the Zika virus, making transfusions safer. About 692 people who need blood transfusions will receive either treated or standard blood. The goal is to see if the treated blood works just as well and is safe…
Phase: PHASE3 • Sponsor: Cerus Corporation • Aim: Disease control
Last updated Jun 27, 2026 11:03 UTC
-
Could listening to music ease the stress of stem cell transplants?
Symptom relief OngoingThis pilot study tests whether a daily mindful music listening program is practical and acceptable for patients hospitalized after an allogeneic stem cell transplant. About 35 adults will listen to music for one hour each day using a web-based platform. The study measures how fea…
Phase: NA • Sponsor: University of Colorado, Denver • Aim: Symptom relief
Last updated Jun 27, 2026 12:03 UTC
-
Art and exercise may boost recovery for kids after transplant
Symptom relief OngoingThis study looks at whether adding art therapy to physical therapy can help children aged 5 to 18 recover emotionally and physically after a stem cell transplant. For two weeks, some children receive both art and physical therapy daily, while others get only physical therapy. Res…
Phase: NA • Sponsor: Medical University of South Carolina • Aim: Symptom relief
Last updated Jun 27, 2026 08:11 UTC
-
Did storing testicular tissue as a child protect fertility? new study aims to find out
Knowledge-focused ENROLLING_BY_INVITATIONThis study follows 50 young men who had cancer or blood disorders as children and received treatments that can harm fertility. Some stored testicular tissue before treatment; others did not. Researchers will check their fertility through exams, ultrasounds, blood tests, and semen…
Phase: NA • Sponsor: Universitair Ziekenhuis Brussel • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:29 UTC