F.R.C.R. J. P. Lawson M.B.

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The accessory navicular is usually considered a normal anatomic and roentgenographic variant. The term may refer to two distinct patterns. First, a sesamoid bone may be present within the posterior tibial tendon (Type 1); this is anatomically separate from the navicular. Second, an accessory ossification center may be medial to the navicular (Type 2).(More)
Pinemoth caterpillar disease is a well-recognised disorder which occurs in South-Eastern China and is due to contact with the cocoons or larvae of the pinemoth (Dendrolimus punctatus). Generalised symptoms, which may be noted within two weeks of contact, consist of pyrexia, anorexia, malaise, rigors, headache, or dizziness. Localised abnormalities include(More)
Fig. 1A, B. A A postero-anterior roentgenogram of the chest demonstrates a well-defined opacity, approximately 11 cm in diameter, overlying the left hemithorax. The left 1st rib is markedly thinned and expanded. Bony trabeculae are noted throughout the opacity. B A laminogram of the left upper hemithorax confirms the well-defined margins of the opacity and(More)
Fig. 1 A, B. A A posteroanterior roentgenogram of the chest demonstrates a periosteal reaction involving the left fourth rib anteriorly. B A cone down roentgenogram of the left upper ribs confirms the periosteal reaction and demonstrates a soft tissue mass approximately 6 • 2cm containing an area of calcification 1 cm. in diameter. The lateral cortex of the(More)
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