Other Names for this Disease
- Francois dyscephalic syndrome
- Hallermann Streiff Francois syndrome
- Hallermann Streiff syndrome
Craniofacial features may include a short, broad head (brachycephaly) with an unusually prominent forehead and/or sides of the skull (frontal bossing); a small, underdeveloped lower jaw (micrognathia); a narrow, highly arched roof of the mouth (palate); and a thin, pinched, tapering nose (beaked nose). Ocular abnormalities may include clouding of the lenses of the eyes at birth (congenital cataracts); unusually small eyes (microphthalmia); and/or other abnormalities.
Dental defects may include the presence of teeth at birth (natal teeth) and/or absence, malformation, or improper alignment of teeth. Hypotrichosis (sparse hair) is present in about 80 percent of affected individuals. Other features may include skin atrophy of the face, and/or hypoplasia (underdevelopment) of the clavicles and ribs. Intellectual disability is present in some cases (approximately 15 percent). In many cases, additional abnormalities are present.
The Human Phenotype Ontology provides the following list of signs and symptoms for Hallermann-Streiff syndrome. 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.
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.
- Hallermann Streiff Syndrome. NORD. April 11, 2012; http://www.rarediseases.org/rare-disease-information/rare-diseases/byID/498/viewAbstract. Accessed 7/23/2012.
- Graham JM. Hallermann Streiff Syndrome. National Organization for Rare Disorders (NORD). 2008; http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Hallermann%20Streiff%20Syndrome. Accessed 3/19/2010.
- Hallerman-Streiff Syndrome. Online Mendelian Inheritance in Man (OMIM). 2010; http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=234100. Accessed 3/19/2010.
- Hallermann-Streiff-François syndrome. Orphanet. March 2006; http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&Expert=2108. Accessed 7/23/2012.