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Diamond-Blackfan anemia 14 with mandibulofacial dysostosis(DBA14)

MedGen UID:
895657
Concept ID:
C4225422
Disease or Syndrome
Synonym: DBA14
 
Gene (location): TSR2 (Xp11.22)
 
Monarch Initiative: MONDO:0010493
OMIM®: 300946

Disease characteristics

Excerpted from the GeneReview: Diamond-Blackfan Anemia
Diamond-Blackfan anemia (DBA) is characterized by a profound normochromic and usually macrocytic anemia with normal leukocytes and platelets, congenital malformations in up to 50%, and growth deficiency in 30% of affected individuals. The hematologic complications occur in 90% of affected individuals during the first year of life. The phenotypic spectrum ranges from a mild form (e.g., mild anemia or no anemia with only subtle erythroid abnormalities, physical malformations without anemia) to a severe form of fetal anemia resulting in nonimmune hydrops fetalis. DBA is associated with an increased risk for acute myelogenous leukemia (AML), myelodysplastic syndrome (MDS), and solid tumors including osteogenic sarcoma. [from GeneReviews]
Authors:
Colin Sieff   view full author information

Clinical features

From HPO
Unilateral cryptorchidism
MedGen UID:
98467
Concept ID:
C0431664
Congenital Abnormality
Absence of a testis from the scrotum on one side owing to failure of the testis or testes to descend through the inguinal canal to the scrotum.
Conductive hearing impairment
MedGen UID:
9163
Concept ID:
C0018777
Disease or Syndrome
An abnormality of vibrational conductance of sound to the inner ear leading to impairment of sensory perception of sound.
Microtia
MedGen UID:
57535
Concept ID:
C0152423
Congenital Abnormality
Underdevelopment of the external ear.
Atresia of the external auditory canal
MedGen UID:
78613
Concept ID:
C0266597
Congenital Abnormality
Absence or failure to form of the external auditory canal.
Macrocytic anemia
MedGen UID:
1920
Concept ID:
C0002886
Disease or Syndrome
A type of anemia characterized by increased size of erythrocytes with increased mean corpuscular volume (MCV) and increased mean corpuscular hemoglobin (MCH).
Persistence of hemoglobin F
MedGen UID:
68693
Concept ID:
C0239941
Finding
Hemoglobin F (HbF) contains two globin alpha chains and two globin gamma chains. It is the main form of hemoglobin in the fetus during the last seven months of intrauterine development and in the half year of postnatal life. In adults it normally makes up less than one percent of all hemoglobin. This term refers to an increase in HbF above this limit. In beta thalassemia major, it may represent over 90 percent of all hemoglobin, and in beta thalassemia minor it may make up between 0.5 to 4 percent.
Increased mean corpuscular volume
MedGen UID:
81303
Concept ID:
C0302845
Finding
Larger than normal size of erythrocytes.
Micrognathia
MedGen UID:
44428
Concept ID:
C0025990
Congenital Abnormality
Developmental hypoplasia of the mandible.
Elevated red cell adenosine deaminase activity
MedGen UID:
1853120
Concept ID:
C5872908
Finding
Increase in the level of adenosine deaminase (ADA), an enzyme involved in purine metabolism, within erythrocytes. ADA is involved in the catabolism of adenosine.
Downslanted palpebral fissures
MedGen UID:
98391
Concept ID:
C0423110
Finding
The palpebral fissure inclination is more than two standard deviations below the mean.
Midface retrusion
MedGen UID:
339938
Concept ID:
C1853242
Anatomical Abnormality
Posterior positions and/or vertical shortening of the infraorbital and perialar regions, or increased concavity of the face and/or reduced nasolabial angle.
Cleft palate
MedGen UID:
756015
Concept ID:
C2981150
Congenital Abnormality
Cleft palate is a developmental defect of the palate resulting from a failure of fusion of the palatine processes and manifesting as a separation of the roof of the mouth (soft and hard palate).
Sparse eyelashes
MedGen UID:
375151
Concept ID:
C1843300
Finding
Decreased density/number of eyelashes.

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