Dr. Stewart William Mccallum M.D.

The ureters are two muscular tubes that collect urine from the kidneys, transporting it to the urinary bladder where urine is temporarily stored before being expelled. Strictures in the ureters represent tough scars in the walls of the ureter that narrow the interior and block the normal flow of...

What are leukocytes?White blood cells (WBCs) are also called as leukocytes. They protect the body from infections by fighting foreign invaders such as viruses, bacteria, fungi, or parasites. Phagocytes and lymphocytes are forms of white blood cells (WBCs).Phagocytes engulf foreign particles like...

What is trichomoniasis?Trichomoniasis or "trich" is a common infection of the reproductive organs. It spreads by sexual contact with the infected person. For this reason, it is a type of sexually transmitted infection (STI). Women are invariably at greater risk. However, the infection is not...

Kidney stones are ball-like structures in the urinary system. These stones are formed as a result of the solidification of minerals and acidic materials in the bladder or ureter. The kidneys filter these substances from the blood.Kidney stones are caused by intake of foods that lead to excess...

Herpes is caused by the herpes simplex virus (HSV). This virus causes both genital herpes and oral herpes (cold sores). However, the strain varies, with the herpes simplex virus type 1 (HSV1) causing cold sores while the herpes simplex type 2 (HSV2) causes genital herpes. HSV1 is mostly transmitted...

At What Age Does Erectile Dysfunction Normally Occur?Erectile dysfunction affects men across all age brackets. It is possible for men both young and old to suffer from it. However the risks associated with ED increase as you get older. This is because as you grow older, the probability of...