Diffusely dense skull base

Otitis externa, also called swimmer's ear, is inflammation of the ear canal. It often presents with ear pain, swelling of the ear canal, and occasionally decreased hearing. [Source: Wikipedia ]

May Be Caused by

Common: Fibrous dysplasia; Paget disease of bone
Uncommon: Camurati-Engelmann disease; Cleidocranial dysostosis; Craniodiaphyseal dysplasia; Craniometaphyseal dysplasia; Diaphyseal dysplasia; Dysosteosclerosis; Endosteal hyperostosis van Buchem type; Endosteal hyperostosis Worth type; Fluorosis; Frontometaphyseal dysplasia; Healing vitamin D-resistant rickets; Hurler syndrome; Hyperparathyroidism; Hyperphosphatasia; Hypervitaminosis D; Hypothyroidism; Infantile hypothyroidism; Infantile multisystem inflammatory disease; Melnick-Needles osteodysplasty; Melorheostosis; Meningioma; Metaphyseal chondrodysplasia Jansen type; Mucopolysaccharidosis; Neurofibromatosis; Osteopathia striata with cranial sclerosis; Osteopetrosis; Otopalatodigital syndrome; Pachydermoperiostosis; Primary anemia; Pyknodysostosis; Pyle dysplasia; Sclerosteosis; Tricho-dento-osseous syndrome; Williams syndrome