{"Name":"Crouzon syndrome-acanthosis nigricans syndrome","DiseaseID__c":"GARD:0016810","id":16810,"encodedName":"crouzon-syndrome-acanthosis-nigricans-syndrome","IsDeleted":false,"Disease_Name_Full__c":"Crouzon syndrome-acanthosis nigricans syndrome","Xref_IDs__c":"702361006; C2677099; C38145; C567382; DOID:0111161; MEDGEN:394201; MONDO:0012833; OMIM:612247; ORPHA:93262","USA_Estimate__c":"5,000","No_of_Specialist_Tagsa__c":5,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":0,"No_of_HHS_records__c":1,"World_Estimate__c":"8,000 to 80,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":1,"No_of_Disease_Descriptions__c":4,"Disease_Characteristics_Score__c":7,"No_of_Age_at_Onset__c":2,"Description_Source__c":"MONDO:0012833","Disease_Description__c":"Crouzon syndrome with acanthosis nigricans (CAN) is a very rare, clinically heterogeneous form of faciocraniostenosis with Crouzon-like features and premature synostosis of cranial sutures (Crouzon disease, see this term), associated with acanthosis nigricans (AN; see this term).","GARD_Name__c":"Crouzon syndrome-acanthosis nigricans syndrome","GARD_Synonym__c":"can; chronic allograft nephropathy; chronic kidney allograft nephropathy; crouzon syndrome with acanthosis nigricans; crouzon-dermoskeletal syndrome; crouzonodermoskeletal syndrome","Curated_Disease_Description_Source__c":"ORPHA:93262","Curated_Disease_Description__c":"Crouzon syndrome with acanthosis nigricans is a disorder characterized by the premature joining of certain bones of the skull (craniosynostosis) during development and a skin condition called acanthosis nigricans. The signs and symptoms of Crouzon syndrome with acanthosis nigricans overlap with those of a similar condition called Crouzon syndrome. Both conditions involve premature fusion of the skull bones, which affects the shape of the head and face. Other common features of both conditions include wide-set, bulging eyes due to shallow eye sockets; eyes that do not point in the same direction (strabismus); a small, beaked nose; and a flat or sunken appearance of the middle of the face (midface hypoplasia). Less common features that can occur in either disorder include an opening in the roof of the mouth (cleft palate), dental problems, or hearing loss. People with Crouzon syndrome or Crouzon syndrome with acanthosis nigricans usually have normal intelligence. Crouzon syndrome with acanthosis nigricans is distinguished from Crouzon syndrome by several features, including skin abnormalities. Acanthosis nigricans is a skin condition characterized by thick, dark, velvety skin in body folds and creases, including the neck and underarms. People with Crouzon syndrome with acanthosis nigricans may also have other skin abnormalities; for example, scars in the thick, dark areas of skin are flat and pale. These scars are usually from surgical procedures that are commonly needed in affected individuals. Additionally, in some people with the condition, one or both nasal passages are narrowed (choanal stenosis) or completely blocked (choanal atresia), which can cause difficulty breathing. A buildup of fluid in the brain (hydrocephalus) can also occur. Nasal passage abnormalities and hydrocephalus are rare in Crouzon syndrome. Less common features of Crouzon syndrome with acanthosis nigricans include subtle changes in the bones of the spine (vertebrae), abnormalities of the finger bones, and noncancerous growths in the jaw called cementomas.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"5,000","Age_at_Onset_Snippet_Text__c":"during Pregnancy and as a Newborn","SourceID__c":"ORPHA:93262","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0012833","ORPHANET_ID__c":"ORPHA:93262","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Síndrome de crouzon con acantosis nigricans","Spanish_Description_Source__c":"ORPHA:93262","Spanish_Description__c":"El síndrome de Crouzon con acantosis nigricans (CAN) es una forma muy rara de faciocranioestenosis. Su presentación clínica es variable y consiste en rasgos tipo-Crouzon y sinostosis prematura de las suturas craneales (enfermedad de Crouzon, consulte este término), asociado con acantosis nigricans (AN; consulte este término).","Spanish_Disease_Name__c":"síndrome de crouzon con acantosis nigricans","Spanish_GARD_Synonym__c":"síndrome dermoesquelético de crouzon","Category_Linearization__c":"ORPHA:93890","icd10_id__c":null,"mesh_id__c":null,"omim_id__c":null,"snomed_id__c":null,"umls_id__c":null,"GARD_Disease__c":[{"Curated_Disease_Description__c":"Crouzon syndrome with acanthosis nigricans is a disorder characterized by the premature joining of certain bones of the skull (craniosynostosis) during development and a skin condition called acanthosis nigricans. The signs and symptoms of Crouzon syndrome with acanthosis nigricans overlap with those of a similar condition called Crouzon syndrome. Both conditions involve premature fusion of the skull bones, which affects the shape of the head and face. Other common features of both conditions include wide-set, bulging eyes due to shallow eye sockets; eyes that do not point in the same direction (strabismus); a small, beaked nose; and a flat or sunken appearance of the middle of the face (midface hypoplasia). Less common features that can occur in either disorder include an opening in the roof of the mouth (cleft palate), dental problems, or hearing loss. People with Crouzon syndrome or Crouzon syndrome with acanthosis nigricans usually have normal intelligence. Crouzon syndrome with acanthosis nigricans is distinguished from Crouzon syndrome by several features, including skin abnormalities. Acanthosis nigricans is a skin condition characterized by thick, dark, velvety skin in body folds and creases, including the neck and underarms. People with Crouzon syndrome with acanthosis nigricans may also have other skin abnormalities; for example, scars in the thick, dark areas of skin are flat and pale. These scars are usually from surgical procedures that are commonly needed in affected individuals. Additionally, in some people with the condition, one or both nasal passages are narrowed (choanal stenosis) or completely blocked (choanal atresia), which can cause difficulty breathing. A buildup of fluid in the brain (hydrocephalus) can also occur. Nasal passage abnormalities and hydrocephalus are rare in Crouzon syndrome. Less common features of Crouzon syndrome with acanthosis nigricans include subtle changes in the bones of the spine (vertebrae), abnormalities of the finger bones, and noncancerous growths in the jaw called cementomas.","Curated_Disease_Description_Source__c":"ORPHA:93262","GARD_Synonym__c":"can; chronic allograft nephropathy; chronic kidney allograft nephropathy; crouzon syndrome with acanthosis nigricans; crouzon-dermoskeletal syndrome; crouzonodermoskeletal syndrome","Name":"Crouzon syndrome-acanthosis nigricans syndrome","Curated_USA_Estimate__c":"5,000","estimateUsa":"5,000"}],"GARD_Disease_Tag__c":[{"Tag_Name__c":"Genetics","Tag_Category__c":"Cause;Disease Category;Specialist","category_description":"Genetic diseases affect the DNA, or genetic instructions, which directs how tissues, organs, and body systems function.","curated_tag_name":"Genetic diseases"},{"Tag_Name__c":"Ophthalmology","Tag_Category__c":"Specialist"},{"Tag_Name__c":"Congenital Abnormality","Tag_Category__c":"Disease Category","category_description":"Birth defects are structural changes present at birth that can affect almost any part of the body, including how the body looks, works, or both.","curated_tag_name":"Birth defects"},{"Tag_Name__c":"Orthopedics","Tag_Category__c":"Specialist"},{"Tag_Name__c":"Craniofacial Anomalies","Tag_Category__c":"Account","curated_tag_name":"Craniofacial anomalies"},{"Tag_Name__c":"Neuro-Ophthalmology","Tag_Category__c":"Specialist","curated_tag_name":"Neuro-ophthalmic diseases"},{"Tag_Name__c":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Neonatal","Provided_By__c":"ORPHA:93262"},{"Age_At_Onset__c":"Antenatal","Provided_By__c":"ORPHA:93262"}],"External_Identifier_Disease__c":[{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK1455","Source__c":"Gene Review","Xref__c":"NBK1455"},{"URL__c":"https://www.omim.org/entry/612247","Source__c":"C2677099; MONDO:0012833; ORPHA:93262","Xref__c":"OMIM:612247"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0111161","Source__c":"MONDO:0012833","Xref__c":"DOID:0111161"},{"URL__c":"https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncit/C38145","Source__c":"MONDO:0012833","Xref__c":"C38145"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=394201","Source__c":"C2677099","Xref__c":"MEDGEN:394201"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C2677099","Source__c":"C2677099","Xref__c":"C2677099"},{"URL__c":"https://www.orpha.net/en/disease/detail/93262","Source__c":"C2677099; MONDO:0012833; ORPHA:93262","Xref__c":"ORPHA:93262"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=702361006","Source__c":"C2677099; MONDO:0012833","Xref__c":"702361006"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C567382","Source__c":"MONDO:0012833","Xref__c":"C567382"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0012833","Source__c":"GARD:0016810","Xref__c":"MONDO:0012833"},{"URL__c":"https://medlineplus.gov/genetics/condition/crouzon-syndrome-with-acanthosis-nigricans","Source__c":"GARD:0016810","Xref__c":"https://medlineplus.gov/genetics/condition/crouzon-syndrome-with-acanthosis-nigricans"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"FGFR3","GHR_URL__c":"https://medlineplus.gov/genetics/gene/fgfr3","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal dominant"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Interpupillary distance more than 2 SD above the mean (alternatively, the appearance of an increased interpupillary distance or widely spaced eyes).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000316","HPO_Synonym__c":"Excessive orbital separation; Increased distance between eye sockets; Increased distance between eyes; Increased interpupillary distance; Ocular hypertelorism; Wide-set eyes; Widely spaced eyes; Widened interpupillary distance","HPO_Name__c":"Hypertelorism","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Nasal ridge curving anteriorly to an imaginary line that connects the nasal root and tip. The nose appears often also prominent, and the columella low.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000444","HPO_Synonym__c":"Beaked nose; Beaklike protrusion; Convex dorsum of nose; Convex nasal dorsum; Hooked nose; Polly beak nasal deformity","HPO_Name__c":"Convex nasal ridge","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Migraine is a chronic neurological disorder characterized by episodic attacks of headache and associated symptoms.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002076","HPO_Synonym__c":"Intermittent migraine headaches; Migraine; Migraine headache; Migraine headaches","HPO_Name__c":"Migraine","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Tall head relative to width and length.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000262","HPO_Synonym__c":"Tall shaped cranium; Tall shaped skull; Tower cranium shape; Tower skull shape; Turricephalus","HPO_Name__c":"Turricephaly","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"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.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000238","HPO_Synonym__c":"Hydrocephaly; Nonsyndromal hydrocephalus; Too much cerebrospinal fluid in the brain","HPO_Name__c":"Hydrocephalus","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002093","HPO_Synonym__c":"Respiratory impairment","HPO_Name__c":"Respiratory insufficiency","Feature_System__c":"Respiratory system","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Atrophy of the optic nerve. Optic atrophy results from the death of the retinal ganglion cell axons that comprise the optic nerve and manifesting as a pale optic nerve on fundoscopy.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000648","HPO_Synonym__c":"Optic nerve atrophy; Optic-nerve degeneration","HPO_Name__c":"Optic atrophy","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormality of the sacral bone.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0005107","HPO_Synonym__c":"Abnormality of the sacrum","HPO_Name__c":"Abnormal sacrum morphology","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007360","HPO_Synonym__c":"Absent/small cerebellum; Absent/underdeveloped cerebellum; Atrophy/Degeneration affecting the cerebellum; Atrophy/Hypoplasia of the cerebellum; Cerebellar hypoplasia/atrophy","HPO_Name__c":"Aplasia/Hypoplasia of the cerebellum","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality of vibrational conductance of sound to the inner ear leading to impairment of sensory perception of sound.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000405","HPO_Synonym__c":"Conduction deafness; Conductive deafness; Conductive hearing loss; Hearing loss, conductive","HPO_Name__c":"Conductive hearing impairment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Abnormal morphology of vertebral body.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003312","HPO_Synonym__c":"Abnormal vertebral bodies; Abnormally shaped vertebrae","HPO_Name__c":"Abnormal form of the vertebral bodies","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Abnormally small dimension of the Maxilla. Usually creating a malocclusion or malalignment between the upper and lower teeth or resulting in a deficient amount of projection of the base of the nose and lower midface region.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000327","HPO_Synonym__c":"Decreased size of maxilla; Decreased size of upper jaw; Hypoplasia of upper jaw bones; Hypoplastic maxillary bones; Maxillary deficiency; Maxillary hypoplasia; Maxillary micrognathia; Maxillary retrognathia; Maxillary retrusion; Micromaxilla; Small maxilla; Small upper jaw; Small upper jaw bones; Upper jaw deficiency; Upper jaw retrusion","HPO_Name__c":"Hypoplasia of the maxilla","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Any abnormal shape or structure of the metacarpal bones.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0005916","HPO_Synonym__c":"Abnormal shape of long bones of hand; Abnormal shape of metacarpal bones","HPO_Name__c":"Abnormal metacarpal morphology","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Inflammation of the eye, parts of the eye or the periorbital region.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100533","HPO_Synonym__c":"Inflammatory abnormality of the eye; Ocular inflammation","HPO_Name__c":"Inflammatory abnormality of the eye","Feature_System__c":"Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A misalignment of the eyes so that the visual axes deviate from bifoveal fixation. The classification of strabismus may be based on a number of features including the relative position of the eyes, whether the deviation is latent or manifest, intermittent or constant, concomitant or otherwise and according to the age of onset and the relevance of any associated refractive error.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000486","HPO_Synonym__c":"Cross-eyed; Squint; Squint eyes","HPO_Name__c":"Strabismus","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Digits that appear disproportionately short compared to the hand/foot. The word brachydactyly is used here to describe a series distinct patterns of shortened digits (brachydactyly types A-E). This is the sense used here.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001156","HPO_Synonym__c":"Brachydactyly syndrome; Short fingers or toes","HPO_Name__c":"Brachydactyly","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Visual impairment (or vision impairment) is vision loss (of a person) to such a degree as to qualify as an additional support need through a significant limitation of visual capability resulting from either disease, trauma, or congenital or degenerative conditions that cannot be corrected by conventional means, such as refractive correction, medication, or surgery.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000505","HPO_Synonym__c":"Impaired vision; Loss of eyesight; Poor vision; Visual impairment","HPO_Name__c":"Visual impairment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Any abnormality of the palate, i.e., of roof of the mouth.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000174","HPO_Synonym__c":"Abnormality of the palate; Abnormality of the roof of the mouth; Palatal anomaly; Palate abnormality","HPO_Name__c":"Abnormal palate morphology","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormally increased height of the forehead.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000348","HPO_Synonym__c":"High forehead","HPO_Name__c":"High forehead","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The upper eyelid margin is positioned 3 mm or more lower than usual and covers the superior portion of the iris (objective); or, the upper lid margin obscures at least part of the pupil (subjective).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000508","HPO_Synonym__c":"Blepharoptosis; Drooping upper eyelid; Eyelid ptosis; Palpebral ptosis","HPO_Name__c":"Ptosis","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An increase of the pressure inside the cranium (skull) and thereby in the brain tissue and cerebrospinal fluid.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002516","HPO_Synonym__c":"Intracranial hypertension; Intracranial pressure elevation; Rise in pressure inside skull","HPO_Name__c":"Increased intracranial pressure","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality of skull shape characterized by a decreased anterior-posterior diameter. That is, a cephalic index greater than 81%. Alternatively, an apparently shortened anteroposterior dimension (length) of the head compared to width.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000248","HPO_Synonym__c":"Short and broad skull","HPO_Name__c":"Brachycephaly","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Bilateral bulging of the lateral frontal bone prominences with relative sparing of the midline.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002007","HPO_Synonym__c":"Frontal protuberance; Skull bossing","HPO_Name__c":"Frontal bossing","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Chiari malformation consists of a downward displacement of the cerebellar tonsils and the medulla through the foramen magnum, sometimes causing hydrocephalus as a result of obstruction of CSF outflow.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002308","HPO_Synonym__c":"Arnold-Chiari malformation; Cerebellar tonsillar ectopia","HPO_Name__c":"Chiari malformation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Underdevelopment of the malar prominence of the jugal bone (zygomatic bone in mammals), appreciated in profile, frontal view, and/or by palpation.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000272","HPO_Synonym__c":"Decreased size of malar bone; Depressed malar region; Flat cheekbone; Malar hypoplasia; Underdevelopment of malar bone; Zygomatic flattening","HPO_Name__c":"Malar flattening","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Absence or abnormal closure of the choana (the posterior nasal aperture). Most embryologists believe that posterior choanal atresia results from a failure of rupture between the 35th and 38th day of fetal life of the partition which separates the bucconasal or buccopharyngeal membranes. The resultant choanal atresia may be unilateral or bilateral, bony or membranous, complete or incomplete. In over 90 per cent of cases the obstruction is bony, while in the remainder it is membranous. The bony type of atresia is commonly located 1-2 mm. anterior to the posterior edge of the hard palate, and the osseous septum varies in thickness from 1 to 10 mm. In the membranous form of choanal atresia the obstruction usually occurs further posteriorly. In approximately one third of cases the atresia is bilateral.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000453","HPO_Synonym__c":"Blockage of the rear opening of the nasal cavity","HPO_Name__c":"Choanal atresia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An eye that is protruding anterior to the plane of the face to a greater extent than is typical.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000520","HPO_Synonym__c":"Anterior bulging of the globe; Anterior bulging of the globe of eye; Bulging eye; Exophthalmos; Eyeballs bulging out; Ocular proptosis; Prominent eyes; Prominent globes; Protruding eyes; Protrusio bulbi","HPO_Name__c":"Proptosis","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:93262","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A dermatosis characterized by thickened, hyperpigmented plaques, typically on the intertriginous surfaces and neck.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000956","HPO_Synonym__c":"Darkened and thickened skin; Keratosis nigricans","HPO_Name__c":"Acanthosis nigricans","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics","Congenital Abnormality"],"Specialist":["Genetics","Ophthalmology","Orthopedics","Neuro-Ophthalmology","Pediatrics"],"Account":["Craniofacial Anomalies"]},"synonyms":["can"," chronic allograft nephropathy"," chronic kidney allograft nephropathy"," crouzon syndrome with acanthosis nigricans"," crouzon-dermoskeletal syndrome"," crouzonodermoskeletal syndrome"]}