Oblique fissure haematoma
Stabbed R. shoulder blade 3/52. Pneumothorax. Pain at chest drain site. Afebrile.
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Large, well demarcated ovoid homogeneous opacity 9.5 x 5.5 cm in right upper zone. Given the sharp margins it is most likely pleural in origin (versus parenchymal). The distinct shape suggest that it follows the oblique fissure.
Differentials for such findings are fissural cyst, fissural haematoma. This patient has known haematoma along right oblique fissure. Minimal interval change.
If clinically not infective, haematoma is unlikely to be infected.