Marfanoid habitus – intellectual deficit, autosomal recessive is a very rare multiple congenital anomalies syndrome described in four sibs and characterized by intellectual deficit, flat face and some skeletelal features of Marfan syndrome (see this term) such as tall stature, dolichostenomelia, arm span larger than height, arachnodactyly of hands and feet, little subcutaneous fat, muscle hypotonia and intellectual deficit.

Distance between the philtral ridges, measured just above the vermilion border, more than 2 standard deviations above the mean, or alternatively, an apparently increased distance between the ridges of the philtrum.