We describe two patients with cyst-like lesions of bone that developed at sites of healed or healing fractures. One case showed histological features of a unicameral bone cyst, which, to the best of our knowledge, is a previously unreported finding in a post-traumatic cyst. It is suggested that there are two principal clinical and radiological types of post-traumatic cyst, of which each of our cases represents an example: (1) asymptomatic transient cortical lesions, found only in children, and (2) more central expanding lesions, found in a wider age group and associated with pain, swelling, and pathological fractures.

Twelve aorto‐enteric fistulas are reviewed. The typical presentation is a patient with gastrointestinal bleeding (acute or chronic) and an abdominal aortic graft, often with symptoms of infection. Endoscopy and computed tomography are the most useful preoperative investigations. False aneurysms seen on aortography can be confused with normal suture line irregularity. A nipple projecting from the aneurysm is very suggestive of a fistula, while contrast extravasation is diagnostic, but rarely seen. Barium studies and ultrasound can be helpful.

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The entity of caecal faecoliths is not well known to most radiologists. It presents as a hard tender palpable mass in the right iliac fossa. It usually occurs in older women with chronic constipation. On ultrasound it appears as an intracaecal, highly echogenic, shadowing mass. Plain radiographs may show lamellated calcifications. Barium enema shows a well defined intracaecal mass. Using a combination of ultrasound and plain films or barium enema, a preoperative diagnosis should be possible.

Eight cases of focal non-traumatic haemorrhage into the intraconal retrobulbar space in children or young adults have been examined by computed tomography. The lesion is seen as a smoothly rounded, localized mass, which does not extend to fill the intraconal space. Magnetic resonance imaging in two cases did not reveal the expected high signal on T1-weighted images, but in most patients the combination of clinical and radiological features is sufficiently indicative of the diagnosis to allow conservative management.