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Fanconi anemia complementation group R(FANCR)

MedGen UID:
924579
Concept ID:
C4284093
Disease or Syndrome
Synonyms: FANCONI ANEMIA, COMPLEMENTATION GROUP R; FANCR
 
Gene (location): RAD51 (15q15.1)
 
Monarch Initiative: MONDO:0014986
OMIM®: 617244

Disease characteristics

Excerpted from the GeneReview: Fanconi Anemia
Fanconi anemia (FA) is characterized by physical abnormalities, bone marrow failure, and increased risk for malignancy. Physical abnormalities, present in approximately 75% of affected individuals, include one or more of the following: short stature, abnormal skin pigmentation, skeletal malformations of the upper and/or lower limbs, microcephaly, and ophthalmic and genitourinary tract anomalies. Progressive bone marrow failure with pancytopenia typically presents in the first decade, often initially with thrombocytopenia or leukopenia. The incidence of acute myeloid leukemia is 13% by age 50 years. Solid tumors – particularly of the head and neck, skin, and genitourinary tract – are more common in individuals with FA. [from GeneReviews]
Authors:
Parinda A Mehta  |  Christen Ebens   view full author information

Clinical features

From HPO
Pelvic kidney
MedGen UID:
67446
Concept ID:
C0221209
Congenital Abnormality
A developmental defect in which a kidney is located in an abnormal anatomic position within the pelvis.
Absent thumb
MedGen UID:
480441
Concept ID:
C3278811
Finding
Absent thumb, i.e., the absence of both phalanges of a thumb and the associated soft tissues.
Growth delay
MedGen UID:
99124
Concept ID:
C0456070
Pathologic Function
A deficiency or slowing down of growth pre- and postnatally.
Imperforate anus
MedGen UID:
1997
Concept ID:
C0003466
Congenital Abnormality
Congenital absence of the anus, i.e., the opening at the bottom end of the intestinal tract.
Hydrocephalus
MedGen UID:
9335
Concept ID:
C0020255
Disease or Syndrome
Hydrocephalus is an active distension of the ventricular system of the brain resulting from inadequate passage of CSF from its point of production within the cerebral ventricles to its point of absorption into the systemic circulation.
Tethered cord
MedGen UID:
36387
Concept ID:
C0080218
Disease or Syndrome
During normal embryological development, the spinal cord first occupies the entire length of the vertebral column but goes on to assume a position at the level of L1 due to differential growth of the conus medullaris and the vertebral column. The filum terminale is a slender, threadlike structure that remains after the normal regression of the distal embryonic spinal cord and attaches the spinal cord to the coccyx. A tethered cord results if there is a thickened rope-like filum terminale which anchors the cord at the level of L2 or below, potentially causing neurologic signs owing to abnormal tension on the spinal cord.
Delayed ability to walk
MedGen UID:
66034
Concept ID:
C0241726
Finding
A failure to achieve the ability to walk at an appropriate developmental stage. Most children learn to walk in a series of stages, and learn to walk short distances independently between 12 and 15 months.
Chiari type I malformation
MedGen UID:
196689
Concept ID:
C0750929
Congenital Abnormality
Arnold-Chiari type I malformation refers to a relatively mild degree of herniation of the posteroinferior region of the cerebellum (the cerebellar tonsils) into the cervical canal with little or no displacement of the fourth ventricle. It is characterized by one or both pointed (not rounded) cerebellar tonsils that project 5 mm below the foramen magnum, measured by a line drawn from the basion to the opisthion (McRae Line)
Intellectual disability
MedGen UID:
811461
Concept ID:
C3714756
Mental or Behavioral Dysfunction
Intellectual disability, previously referred to as mental retardation, is characterized by subnormal intellectual functioning that occurs during the developmental period. It is defined by an IQ score below 70.
Anemia
MedGen UID:
1526
Concept ID:
C0002871
Disease or Syndrome
A reduction in erythrocytes volume or hemoglobin concentration.
Bone marrow hypocellularity
MedGen UID:
383749
Concept ID:
C1855710
Finding
A reduced number of hematopoietic cells present in the bone marrow relative to marrow fat.
Scoliosis
MedGen UID:
11348
Concept ID:
C0036439
Disease or Syndrome
The presence of an abnormal lateral curvature of the spine.
Radial dysplasia
MedGen UID:
870597
Concept ID:
C4025046
Congenital Abnormality
Radial dysplasia, also known as radial longitudinal deficiency, includes radial clubhand and is a disfiguring, and potentially disabling, congenital limb anomaly. The entire upper limb may be involved, although the defect is most evident in the forearm and hand. Affected children suffer a variable degree of hypoplasia or absence of the preaxial skeleton and soft tissues, in particular the thumb, radius, and dorsoradial soft tissues. The hand is usually radially deviated and subluxated off the distal aspect of the ulna, the ulna may be shortened and have a bow-shaped deformity, and there is no true wrist (radiocarpal) joint in Bayne2 type-III and IV radial dysplasia.
Microcephaly
MedGen UID:
1644158
Concept ID:
C4551563
Finding
Head circumference below 2 standard deviations below the mean for age and gender.
Agenesis of permanent teeth
MedGen UID:
224851
Concept ID:
C1290511
Congenital Abnormality
A congenital defect characterized by the absence of one or more permanent teeth, including oligodontia, hypodontia, and adontia of the of permanent teeth.
Nevus
MedGen UID:
45074
Concept ID:
C0027960
Neoplastic Process
A nevus is a type of hamartoma that is a circumscribed stable malformation of the skin.
Microphthalmia
MedGen UID:
10033
Concept ID:
C0026010
Congenital Abnormality
Microphthalmia is an eye abnormality that arises before birth. In this condition, one or both eyeballs are abnormally small. In some affected individuals, the eyeball may appear to be completely missing; however, even in these cases some remaining eye tissue is generally present. Such severe microphthalmia should be distinguished from another condition called anophthalmia, in which no eyeball forms at all. However, the terms anophthalmia and severe microphthalmia are often used interchangeably. Microphthalmia may or may not result in significant vision loss.\n\nPeople with microphthalmia may also have a condition called coloboma. Colobomas are missing pieces of tissue in structures that form the eye. They may appear as notches or gaps in the colored part of the eye called the iris; the retina, which is the specialized light-sensitive tissue that lines the back of the eye; the blood vessel layer under the retina called the choroid; or in the optic nerves, which carry information from the eyes to the brain. Colobomas may be present in one or both eyes and, depending on their size and location, can affect a person's vision.\n\nPeople with microphthalmia may also have other eye abnormalities, including clouding of the lens of the eye (cataract) and a narrowed opening of the eye (narrowed palpebral fissure). Additionally, affected individuals may have an abnormality called microcornea, in which the clear front covering of the eye (cornea) is small and abnormally curved.\n\nBetween one-third and one-half of affected individuals have microphthalmia as part of a syndrome that affects other organs and tissues in the body. These forms of the condition are described as syndromic. When microphthalmia occurs by itself, it is described as nonsyndromic or isolated.
Chromosomal breakage induced by crosslinking agents
MedGen UID:
867372
Concept ID:
C4021737
Finding
Increased amount of chromosomal breaks in cultured blood lymphocytes or other cells induced by treatment with DNA cross-linking agents such as diepoxybutane and mitomycin C.

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