Prenatally diagnosed lethal type Larsen-like syndrome associated with bifid tongue.

Larsen syndrome is characterized by multiple joint dislocations, associated with a typical facial appearance and frequently other abnormalities. Both dominant and recessive patterns of inheritance have been reported. A lethal form of Larsen syndrome (Larsen-like syndrome) has been described as a combination of the Larsen phenotype and pulmonary hypoplasia. In this report, we present a 24-week-old female fetus with a possible prenatal diagnosis of thanatophoric dysplasia in whom postmortem examination revealed lethal type Larsen-like syndrome associated with bifid tongue, severe micrognathia and non-immune hydrops fetalis. These findings have not been reported previously in the lethal type Larsen syndrome.