Skull bossing

Skull bossing is when the bones of the skull become bigger than normal. It most often occurs in the frontal bones beneath the forehead. Skull bossing may happen from different medical conditions.

Skull bossing; in this case a kind called frontal bossing when the frontal bones become bigger than normal.

Frontal bossing

Frontal bossing is when the forehead becomes bigger than normal which may also make the brow ridge (eyebrow part of the face) stick out more. It happens when the frontal bone becomes bigger because of a medical condition. This often happens when other facial bones of the skull become bigger too, as well as the jaw bone and the bones in the hands and feet. Frontal bossing is usually seen in a few rare medical syndromes such as acromegaly - a chronic medical disorder in which the anterior pituitary gland makes to much growth hormone (GH).

Turricephaly

Turricephaly, usually called "tower skull", is a type of skull bossing.

Turricephaly often called "tower skull", may be caused by different medical conditions. In some cases such as Apert and Pfeiffer syndromes, it is caused when sutures in the skull close before they are supposed to.

Turricephaly is also one of the most common problems which affect the bones of the face and skull in those with Sickle-cell disease.

Medical disorders that may cause skull bossing

Frontal bossing in a child

• Acromegaly
• Basal cell nevus syndrome
• Congenital syphilis
• Cleidocranial dysostosis
• Crouzon syndrome
• Hurler syndrome
• Pfeiffer syndrome
• Rubinstein-Taybi syndrome
• Russell-Silver syndrome (Russell-Silver dwarf)
• Sickle-cell disease
• Trimethadione (antiseizure drug) use during pregnancy
• Beta-thalassemia (due to expansion of bone marrow secondary to increased hematopoiesis)