Avascular necrosis of the epiphysis of the first metatarsal bone.

We report a case of avascular necrosis of the epiphysis of the right first metatarsal in a 6-year-old boy. Radiographs showed sclerosis, collapse and a crescent sign in the epiphysis. The diagnosis was confirmed by magnetic resonance imaging and scintigraphy.

Ectopic localisation of adrenal cortex.

We present a case of concurrence of ectopic adrenal cortex with a renal cell carcinoma. The diagnosis of the accessory adrenal tissue was made by CT-guided biopsy. With this case report, we draw attention to a specific differential diagnostic problem, policy and to the MR characteristics of ectopic adrenal cortex.

MRI diagnosis of osteomyelitis of the cuboid bone in two infants.

We describe two infants in whom MRI diagnosed osteomyelitis of the cuboid bone when conventional X-rays were negative. Neoplastic, traumatic and ischaemic aetiologies could be excluded with the initial MR examinations.

The use of preoperative fistulography in patients with a second branchial cleft anomaly.

The preoperative fistulography used in cases of second branchial cleft anomalies is an effective method of showing the exact anatomy and topography of these fistulas in the neck. This visualisation is very important because the only therapeutic solution is complete surgical resection. This method is easy to perform and is painless.

Aortic coarctation associated with an aberrant right subclavian artery.

We report a case of aortic coarctation associated with an aberrant right subclavian artery in a young male who was investigated for hypertension. Angiography, CT examination with multiplanar reconstruction and MRI were useful in delineating the extension of the coarctation and the exact anatomy of the aberrant right subclavian artery.

Strecker stent placement in the superior mesenteric artery for recurrent ischemic colitis.

We report on a case of recurrent superior mesenteric artery (SMA) stenosis with symptomatic mesenteric angina after SMA angioplasty. Stent placement of postostial atherosclerotic disease was proposed, with successful result. Moderate aortic protrusion was noted.

Systemic to pulmonary artery shunting.

Two cases showing systemic to pulmonary artery shunting, during the venous phase of bronchial arteriography are presented. In the first patient with chronic bronchiectasis, the shunting is believed to be due to newly formed vessels in the granulomatous tissue. At pulmonary angiography, the increased pressure in the pulmonary arteries simulated an angiographic defect due to dilution of the contrast by retrograde opacification from a left to right shunt.

Radiological aspects in preoperative planning and postoperative assessment of cementless total hip arthroplasty.

Some radiographic aspects in the preoperative measurement of prosthetic component size in cementless total hip arthroplasty were evaluated, primarily the magnification factor of the x rays. The influence of femoral rotation on the assessment of the pre- and postoperative AP x rays was investigated.

Intracavernosal injection of prostaglandin E1 as an alternative for papaverine in penile angiography.

Arteriography of the penile vasculature was performed after intracavernous injection of prostaglandin E1 in five patients. Penile tumescence was obtained in three patients with a dose of 10 micrograms and in the other two patients with a dose of 20 micrograms. Mean duration of penile tumescence was 1 h 36 min.

Renal artery stent placement with use of the Wallstent endoprosthesis.

The Wallstent endoprosthesis was placed in 12 renal arteries of 11 patients; a total of 15 stents were placed. Indications for placement were restenosis after dilation and insufficient result after dilation. In two patients, malpositioning of the stent required placement of a second stent.

Intravascular ultrasonography, a new alternative for the assessment of vascular lesions.

Intravascular ultrasonography (IVUS) was performed in ten patients undergoing a diagnostic or therapeutic angiography. The ultrasound probe was inserted in a 6 French catheter and introduced through a 7 or 8 French sheath. Exact information was yielded about the extent of arteriosclerosis, the stenotic process and the composition of the atheromatous plaque (soft plaque or presence of calcifications).

Percutaneous transluminal laserangioplasty with balloon centered direct argon laser light. Experience with 12 patients and a minimal follow-up of 6 months.

Laser angioplasty with direct argon laser light, combined with a special centering balloon (Lastac system) was performed in 12 patients with a single superficial femoral artery occlusion. The mean length of the occlusion was 5.4 +/- 2.

Unilateral congenital nasolacrimal mucocele.

A case of a congenital nasolacrimal mucocele is reported. This very uncommon finding presents usually with a diagnostic triad on CT: an intranasal cystic mass, a dilated nasolacrimal duct and lacrimal sac.

Computed tomography in the preoperative planning of oral endo-osseous implant surgery.

Computed tomography (CT) is a well-established aid in the preoperative assessment of the dimension of mandible and maxilla for endo-osseous implant installation. CT is a valuable tool for the measurement of the alveolar ridge and recognition of the course of the inferior alveolar nerve canal. In the present study, three different techniques were examined: normal CT images with coronal and sagittal slices, standard reconstructions based on axial slices, and multiplanar reconstruction and display (MPR/MPD), also based on axial slices.

Diagnosis and differential diagnosis of branchial cleft cysts by CT scan.

The author stresses the importance of CT scanning in diagnosing branchial cleft cysts (BCCs) and in differentiating them from other cystic masses of the neck and parotid region. The CT examinations of 40 patients with neck or parotid cystic lesions suspected of being BCCs have been reviewed and correlated with the histological diagnosis. Sixteen BCCs (12 of the second and 4 of the first cleft) and 24 BCC mimics were evaluated.