Merck Manual

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Some Common Congenital Defects of Domesticated Animals

Some Common Congenital Defects of Domesticated Animals

Amelia

Absence of a limb or limbs

Arthrogryposis

Persistent flexure or contracture of a joint or joints

Atresia

Absence or closure of a normal body opening or passage

Brachygnathia

Abnormally short lower jaw

Campylognathia

Curved jaw

Cheiloschisis

Abnormal division of the lip (harelip)

Cryptorchidism

Failure of the testis to descend into the scrotum

Hemimelia

Absence of all or part of the distal half of a limb

Hernia

Abnormal protrusion of an organ or portion of an organ through a defect or natural opening

Hydranencephaly

Virtual absence of cerebral hemispheres and replacement by CSF

Hydrocephalus

Abnormal fluid in the cranial vault accompanied by enlargement of the head

Kyphosis

Abnormally increased convexity of the thoracic spine

Microophthalmia

Abnormally small eye

Palatoschisis

Fissure of the palate (cleft palate)

Perosomus

Developmental anomaly characterized by a greatly deformed body or trunk

Polydactyly

Supernumerary digits

Porencephaly

The presence of cavities in the brain developed during fetal life

Prognathia

Marked projection of the lower jaw

Schistosomia

Developmental anomaly characterized by fissure of the abdominal wall

Scoliosis

Lateral deviation of the spinal axis

Syndactyly

Fusion of the digits

Thoracoschisis

Fissure of the thoracic wall, which may result in herniation of lung tissue