Question: What are the symptoms of Oculocutaneous albinism type 1B ?
Answer: What are the signs and symptoms of Oculocutaneous albinism type 1B? The Human Phenotype Ontology provides the following list of signs and symptoms for Oculocutaneous albinism type 1B. 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) Freckling 90% Generalized hypopigmentation 90% Hypopigmentation of hair 90% Ocular albinism 90% Strabismus 90% Abnormality of the macula 50% Melanocytic nevus 50% Nystagmus 50% Optic atrophy 50% Photophobia 50% Visual impairment 50% Neoplasm of the skin 7.5% Thickened skin 7.5% Albinism - Autosomal recessive inheritance - Hypopigmentation of the fundus - 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