Thick skull

Pachycephalosaurus (; meaning "thick-headed lizard," from Greek pachys-/παχύς- "thick", kephale/κεφαλή "head" and sauros/σαῦρος "lizard") is a genus of pachycephalosaurid dinosaurs. The type species, P. wyomingensis, is the only known species. [Source: Wikipedia ]

May Be Caused by
Aase-Smith syndrome
Achard syndrome
Acrodysostosis
Acromegaly
Aspartylglucosaminuria
Cerebral atrophy
Clouston syndrome
Cockayne syndrome
Coffin-Lowry syndrome
Craniodiaphyseal dysplasia
Craniometaphyseal dysplasia
Cyanotic congenital heart disease
Diaphyseal dysplasia
Distal osteosclerosis
Dyke-Davidoff-Masson syndrome
Endosteal hyperostosis van Buchem type
Endosteal hyperostosis Worth type
Fanconi anemia
Fluorosis
Fountain syndrome
Frontometaphyseal dysplasia
Fucosidosis
Homocystinuria
Hunter syndrome
Hurler syndrome
Hydrocephalus after shunting
Hyperostosis generalisata
Hyperphosphatasia
Hypervitaminosis D
Hypoparathyroidism
Hypothyroidism
Infantile multisystem inflammatory disease
Iron deficiency anemia
Lenz-Majewski dysplasia
Lipodystrophy
Mannosidosis
Marfan syndrome
Marshall syndrome
Microcephaly
Morgagni-Stewart-Morel syndrome
Mucolipidosis type 2
Mucopolysaccharidosis type 6
Myhre syndrome
Myotonic dystrophy
Neu-Laxova syndrome
Oculo-dento-osseous dysplasia
Osteogenesis imperfecta
Osteopathia striata
Osteopetrosis
Otopalatodigital syndrome type 1
Panostotic fibrous dysplasia
POEMS syndrome
Polycythemia
Polyostotic fibrous dysplasia
Proteus syndrome
Pseudohypoparathyroidism
Pyknodysostosis
Pyle dysplasia
Pyruvate kinase deficiency
Renal osteodystrophy
Salla disease
Sanfilippo syndrome
Schwarz-Lélek syndrome
Sickle cell disease
Sjögren-Larsson syndrome
Spherocytosis
Thalassemia
Treated rickets
Tricho-dento-osseous syndrome
Troell-Junet syndrome
Tuberous sclerosis
Weill-Marchesani syndrome
Williams syndrome
X-linked familial calvarial hyperostosis
XXXXY syndrome
Aase-Smith syndrome
Achard syndrome
Acrodysostosis
Acromegaly
Aspartylglucosaminuria
Cerebral atrophy
Clouston syndrome
Cockayne syndrome
Coffin-Lowry syndrome
Craniodiaphyseal dysplasia
Craniometaphyseal dysplasia
Cyanotic congenital heart disease
Diaphyseal dysplasia
Distal osteosclerosis
Dyke-Davidoff-Masson syndrome
Endosteal hyperostosis van Buchem type
Endosteal hyperostosis Worth type
Fanconi anemia
Fluorosis
Fountain syndrome
Frontometaphyseal dysplasia
Fucosidosis
Homocystinuria
Hunter syndrome
Hurler syndrome
Hydrocephalus after shunting
Hyperostosis generalisata
Hyperphosphatasia
Hypervitaminosis D
Hypoparathyroidism
Hypothyroidism
Infantile multisystem inflammatory disease
Iron deficiency anemia
Lenz-Majewski dysplasia
Lipodystrophy
Mannosidosis
Marfan syndrome
Marshall syndrome
Microcephaly
Morgagni-Stewart-Morel syndrome
Mucolipidosis type 2
Mucopolysaccharidosis type 6
Myhre syndrome
Myotonic dystrophy
Neu-Laxova syndrome
Oculo-dento-osseous dysplasia
Osteogenesis imperfecta
Osteopathia striata
Osteopetrosis
Otopalatodigital syndrome type 1
Panostotic fibrous dysplasia
POEMS syndrome
Polycythemia
Polyostotic fibrous dysplasia
Proteus syndrome
Pseudohypoparathyroidism
Pyknodysostosis
Pyle dysplasia
Pyruvate kinase deficiency
Renal osteodystrophy
Salla disease
Sanfilippo syndrome
Schwarz-Lélek syndrome
Sickle cell disease
Sjögren-Larsson syndrome
Spherocytosis
Thalassemia
Treated rickets
Tricho-dento-osseous syndrome
Troell-Junet syndrome
Tuberous sclerosis
Weill-Marchesani syndrome
Williams syndrome
X-linked familial calvarial hyperostosis
XXXXY syndrome