Total 104 clinical symptoms reported for Smith-Lemli-Opitz syndrome  Very Frequent (14)Occasional (50)Frequent (40)

2-3 toe syndactyly	Syndactyly with fusion of toes two and three.   Synonyms:2-3 syndactyly of feet; 2-3 toe soft tissue syndactyly; 2-3 toes syndactyly; partial or complete syndactyly 2nd-3rd toes; Syndactyly of second and third toes; Toe syndactyly, 2-3; Webbed 2nd and 3rd toes	Very frequent
Abnormal dermatoglyphics	An abnormality of dermatoglyphs (fingerprints), which are present on fingers, palms, toes, and soles.   Synonyms:Abnormal fingerprints; Dermatoglyphic abnormalities	Very frequent
Abnormality of dental morphology	An abnormality of the morphology of the tooth.   Synonyms:Abnormality of dental shape; Abnormality of shape of tooth; Abnormally shaped teeth; Deformity of teeth; Dental deformity; Dental malformations; Malformation of teeth; Malformed teeth; Misshapen teeth; Misshapened teeth	Very frequent
Anteverted nares	Anteriorly-facing nostrils viewed with the head in the Frankfurt horizontal and the eyes of the observer level with the eyes of the subject. This gives the appearance of an upturned nose (upturned nasal tip).   Synonyms:Anteverted nose; Anteverted nostrils; Nasal tip, upturned; Nostrils anteverted; Upturned nares; Upturned nasal tip; Upturned nose; Upturned nostrils	Very frequent
Feeding difficulties in infancy	Impaired feeding performance of an infant as manifested by difficulties such as weak and ineffective sucking, brief bursts of sucking, and falling asleep during sucking. There may be difficulties with chewing or maintaining attention.	Very frequent
Gastroesophageal reflux	A condition in which the stomach contents leak backwards from the stomach into the esophagus through the lower esophageal sphincter.   Synonyms:Acid reflux; Acid reflux disease; Gastro-esophageal reflux; Gastroesophageal reflux disease; GERD; Heartburn	Very frequent
Global developmental delay	A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.   Synonyms:Delayed cognitive development; Delayed development; Delayed developmental milestones; Delayed intellectual development; Delayed milestones; Delayed psychomotor development; Developmental delay; Developmental delay in early childhood; Developmental delay, global; Developmental retardation; Lack of psychomotor development; Motor and developmental delay; Psychomotor delay; Psychomotor development deficiency; Psychomotor development failure; Psychomotor developmental delay; Retarded development; Retarded mental development; Retarded psychomotor development	Very frequent
Growth delay	A deficiency or slowing down of growth pre- and postnatally.   Synonyms:Delayed growth; Growth deficiency; Growth delay; Growth failure; Growth retardation; Poor growth; Retarded growth	Very frequent
Hypotonia	Hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle). Even when relaxed, muscles have a continuous and passive partial contraction which provides some resistance to passive stretching. Hypotonia thus manifests as diminished resistance to passive stretching. Hypotonia is not the same as muscle weakness, although the two conditions can co-exist.   Synonyms:Low muscle tone; Low or weak muscle tone; Muscle hypotonia; Muscular hypotonia	Very frequent
Intellectual disability	Subnormal intellectual functioning which originates during the developmental period. Intellectual disability, previously referred to as mental retardation, has been defined as an IQ score below 70.   Synonyms:Intellectual disability; Mental deficiency; Mental retardation; Mental retardation, nonspecific; Mental-retardation; Nonprogressive intellectual disability; Nonprogressive mental retardation	Very frequent
Microcephaly	Head circumference below 2 standard deviations below the mean for age and gender.   Synonyms:Abnormally small cranium; Abnormally small skull; Decreased circumference of cranium; Decreased size of cranium; Decreased size of skull; Reduced head circumference; small calvarium; small cranium; Small head circumference	Very frequent
Micrognathia	Developmental hypoplasia of the mandible.   Synonyms:Decreased size of lower jaw; Decreased size of mandible; Hypoplasia of lower jaw; Hypoplasia of mandible; Hypoplastic mandible; Hypoplastic mandible condyle; Hypotrophic lower jaw; Hypotrophic mandible; Little lower jaw; Little mandible; Lower jaw deficiency; Lower jaw hypoplasia; Lower jaw retrusion; Mandibular deficiency; Mandibular hypoplasia; Mandibular micrognathia; Mandibular retrognathia; Mandibular retrusion; Micrognathia of lower jaw; Micromandible; Robin mandible; Severe hypoplasia of mandible; Small jaw; Small lower jaw; Small mandible; Underdevelopment of lower jaw; Underdevelopment of mandible	Very frequent
Short stature	A height below that which is expected according to age and gender norms. Although there is no universally accepted definition of short stature, many refer to 'short stature' as height more than 2 standard deviations below the mean for age and gender (or below the 3rd percentile for age and gender dependent norms).   Synonyms:Decreased body height; Height less than 3rd percentile; Short stature; Small stature; Stature below 3rd percentile	Very frequent
Wide nasal bridge	Increased breadth of the nasal bridge (and with it, the nasal root).   Synonyms:Broad nasal bridge; Broad nasal root; Broadened nasal bridge; Increased breadth of bridge of nose; Increased breadth of nasal bridge; Increased width of bridge of nose; Increased width of nasal bridge; Nasal bridge broad; Nasal bridge, wide; Wide bridge of nose; Wide nasal bridge; Widened nasal bridge	Very frequent