Question: What are the symptoms of Split hand split foot nystagmus ?
Answer: What are the signs and symptoms of Split hand split foot nystagmus? People with this condition are born with split hands and feet. Split hands and split foot refers to a developmental malformation consisting of missing digits (fingers and/or toes), a deep median cleft (cleft down the center of the hand or foot), and fusion of remaining digits. People with this syndrome also have rapid involuntary movements of the eyes, called nystagmus. Abnormalities of the teeth can occur rarely. The Human Phenotype Ontology provides the following list of signs and symptoms for Split hand split foot nystagmus. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the MedlinePlus Medical Dictionary to look up the definitions for these medical terms. Signs and Symptoms Approximate number of patients (when available) Nystagmus 90% Split foot 90% Split hand 90% Abnormality of the metacarpal bones 50% Strabismus 50% Visual impairment 50% Abnormality of retinal pigmentation 7.5% Cataract 7.5% Autosomal dominant inheritance - Congenital nystagmus - Monodactyly (hands) - Retinopathy - The Human Phenotype Ontology (HPO) has collected information on how often a sign or symptom occurs in a condition. Much of this information comes from Orphanet, a European rare disease database. The frequency of a sign or symptom is usually listed as a rough estimate of the percentage of patients who have that feature. The frequency may also be listed as a fraction. The first number of the fraction is how many people had the symptom, and the second number is the total number of people who were examined in one study. For example, a frequency of 25/25 means that in a study of 25 people all patients were found to have that symptom. Because these frequencies are based on a specific study, the fractions may be different if another group of patients are examined. Sometimes, no information on frequency is available. In these cases, the sign or symptom may be rare or common.
Source: GARD