| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Congenital absence of innominate vein | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Holoprosencephaly, ectrodactyly, cleft lip, cleft palate syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital absence of left foot | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of lower leg and foot | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of lower leg and foot | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital absence of right foot | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary valve agenesis, tetralogy of Fallot, absence of ductus arteriosus syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 5 | 
| Pulmonary valve agenesis, tetralogy of Fallot, absence of ductus arteriosus syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital absence of right hemidiaphragm | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of left testis | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of right testis | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of left hemidiaphragm | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Common atrioventricular canal | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Atrioventricular septal defect - isolated atrial component | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Ventricular septal defect with absent outlet septum and overriding truncal valve with inferior muscular rim | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Ventricular septal defect with absent outlet septum and overriding truncal valve with extension of membranous septum | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Ventricular septal defect with absent outlet septum and overriding truncal valve | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Robin sequence and oligodactyly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Alopecia, progressive neurological defect, endocrinopathy syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Ectrodactyly polydactyly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Postaxial tetramelic oligodactyly | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Thumb deformity, alopecia, pigmentation anomaly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Ectodermal dysplasia syndactyly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Poikiloderma, alopecia, retrognathism, cleft palate syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Anonychia with bizarre flexural pigmentation | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Acephalogaster | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Ear auricle and external auditory canal absent | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of bladder and urethra | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Severe T-cell immunodeficiency, congenital alopecia, nail dystrophy syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Taurodontia with absent teeth and sparse hair syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Congenital amputation of upper limb | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Atrichia with papular lesions | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Phocomelia, ectrodactyly, deafness and sinus arrhythmia syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Ptosis, upper ocular movement limitation, absence of lacrimal punctum syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Hydranencephaly with proliferative vasculopathy | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Bilateral congenital absence of fallopian tube | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Aphalangy, hemivertebra, urogenital, intestinal dysgenesis syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Alopecia, psychomotor epilepsy, periodontal pyorrhea, intellectual disability syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Autosomal recessive aplasia cutis congenita of limb | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Alopecia and intellectual disability with hypergonadotropic hypogonadism syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Hydranencephaly | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Deafness and oligodontia syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Tetralogy of Fallot with absent pulmonary valve | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Aplasia of fibula and ectrodactyly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Anonychia with microcephaly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Craniofrontonasal dysplasia with Poland anomaly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Ablepharon macrostomia syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Bilateral congenital absence of ovary | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Fetal anencephaly | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital hypoplasia of ulna and split foot syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Aplasia cutis with myopia syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Frontonasal dysplasia with alopecia and genital anomaly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital absence of forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Split hand, split foot malformation with sensorineural hearing loss syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Absent thumb with short stature and immunodeficiency syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Ectodermal dysplasia with ectrodactyly and macular dystrophy syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Short tarsus with absence of lower eyelashes syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Omocephalus | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Prune belly syndrome with pulmonic stenosis, intellectual disability and deafness | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Cleft palate with stapes fixation and oligodontia syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Choroidal atrophy and alopecia syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Autosomal recessive palmoplantar keratoderma and congenital alopecia syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Aphalangy and syndactyly with microcephaly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Pericardial and diaphragmatic defect syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Hypogonadism with prune belly syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Autosomal dominant palmoplantar keratoderma and congenital alopecia | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Intellectual disability, balding, patella luxation, acromicria syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Gomez Lopez Hernandez syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Hypomyelination, hypogonadotropic hypogonadism, hypodontia syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Acro-dermato-ungual-lacrimal-tooth syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Spondyloepimetaphyseal dysplasia, abnormal dentition syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Oligodontia and cancer predisposition syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Sebaceous nevus, central nervous system malformations, aplasia cutis congenita, limbal dermoid, pigmented nevus syndrome | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Didymosis aplasticosebacea | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of left forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 4 | 
| Congenital absence of left forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of left forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Congenital absence of left forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital absence of right forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 4 | 
| Congenital absence of right forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital absence of right forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Congenital absence of right forearm and hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Oligodontia | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Transverse arrest carpal level | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Transverse arrest metacarpal first ray | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Intrauterine amputation of lower limb | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Transverse deficiency of hand | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Transverse arrest metacarpal second to fifth rays | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Cor biloculare | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Alopecia, epilepsy, intellectual disability syndrome Moynahan type | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of body of uterus | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Epidermolysis bullosa simplex with hypodontia | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 3 | 
| Congenital absence of skin on scalp | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary trunk absent with absent pulmonary artery | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary trunk absent with absent left pulmonary artery | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary trunk absent with absent right pulmonary artery | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Aplasia cutis congenita of limb | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital absence of epiglottis | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital absence of all bilateral toes | Associated morphology | False | Congenital absence | Inferred relationship | Existential restriction modifier | 1 |