Angioma of the iris.

Angioma of the iris.

ANGIOMATA of the uveal tract are rare and those situated in the anterior parts of the uveal tract are extremely rare (Duke-Elder, 1940). Cases have been reported as haemangiomata of the iris which appeared as vascular tumours on the surface of the iris giving rise to periodic bleeding. Ashton (1964) reviewed the literature on primary tumours of the iris and reported that so far only eight cases...

Angioma of the Retina.

Venous Angioma, Cavernous Angioma, and Hemorrhage

In this issue of AJNR, Wilms et al ( 1) add to the ongoing debate whether the venous angioma, more recently called developmental venous anomaly (2), can be symptomatic, whether it alone can bleed, or whether such hemorrhage occurs because of the concomitant occurrence of a cavernous angioma . This debate is not just semantic. It is essential to pathophysiologic understanding of a given lesion s...

Angioma of the Vertebra

Diagnosis of angioma of the vertebra is a rarity. It may be discovered accidentally while radiographying the spine for some other lesion. And in such a case the disease remains asymptomatic. Symptoms, when present, may be pain in the back (Case No. 1) , or they may be those of spinal cord compression (Case No. 2) which are indistinguishable from those produced by spinal cord tumour. The diagnos...

Evaluation of the Parameters Involved in the Iris Recognition System

Biometric recognition is an automatic identification method which is based on unique features or characteristics possessed by human beings and Iris recognition has proved itself as one of the most reliable biometric methods available owing to the accuracy provided by its unique epigenetic patterns. The main steps in any iris recognition system are image acquisition, iris segmentation, iris norm...