FLATTENED POSTERIOR FOSSA

• Encephaloceles - not only in occipital encephaloceles but has also been reported in ethmoidal and sphenoidal encephaloceles.
• Hypoplasia/aplasia of the cerebellum

FRONTAL BOSSING

• Russel-Silver syndrome.
• Heterozygous Achondroplasia.
• Thanatophoric dysplasia.
• Gorlin Syndrome (Autosomal dominant):

- Macrocephaly with frontal bossing, hypertelorism.

- Ventriculomegaly (occasionally callosal agenesis).

- Calcification of the falx.

- Prognathism.

- Cleft lip and palate.

- Short fourth metacarpal.

- Scoliosis, rib and vertebral abnormalities.

- Cysts of the jaw, basal cell carcinoma and other tumors.

	Normal Cranium
	Frontal Bossing – Achondroplasia Frontal Bossing – Gorlin Syndrome · Macrocephaly · Frontal bossing · Cleft lip and palate · Hyertelorism