Sarcoidosis of the parotid gland.

The clinical and radiological features of parotid-gland sarcoidosis in 22 patients are presented. This occurred in association with systemic disease as painless, diffuse and nonnodular parotid swelling. Conventional sialography usually demonstrated normal proximal ducts, a few fragile distal ducts and non-specific parenchymal nodules.

Nasal airway obstruction: CT assessment.

Twenty-one cases of nasal airway obstruction were analyzed using computed tomography (CT) at the Children's Hospital in Boston between 1980 and 1984. Seven of these patients had stenosis of the entire nasal passage, two had stenosis of the anterior nasal cavity, and 12 had atresia of the posterior choanae. The spectrum of these abnormalities and the optimum technique for CT scanning are discussed.

Ameloblastomas of the jaws: radiological diagnosis and follow-up.

Eleven of 57 tumours and cysts (19 per cent) seen at two major centres over a 4-year period were ameloblastomas, primary in eight and recurrent in three. Computed Tomography (CT) was the most sensitive imaging technique for detecting ameloblastomas. The radiological features were distinctive maxillary and mandibular pathology in primary cases and soft-tissue, maxillary sinus and asymmetrical deep tissue involvement in both primary and recurrent ameloblastomas.

Subdural hematoma in patients with brain tumor: CT evaluation.

Chronic subdural hematoma was identified radiographically and verified surgically in two patients with brain tumor, one meningioma, and one glioblastoma multiforme. Over a period of days or weeks, both patients developed dramatic clinical findings probably related to the mass effect from the subdural hematoma in addition to the preexisting tumor. Early awareness of this complication in patients with brain tumor may lead to successful surgical treatment.

Computed tomography of adult colonic intussusception: clinical and experimental studies.

The CT features of a case of adult ileocolic intussusception and of experimentally induced ileocolic, cecocolic, and colocolic intussusceptions are presented. Both the clinical and experimental cases demonstrated (1) "target" masses with enveloped, eccentrically located areas of low density and (2) interspersed low- and high-density stripes within the intussusception producing a "layered" or "stratified" pattern. This layered pattern of abdominal masses may be characteristic of intussusceptions regardless of location.