Recurrent Calcium Renal Calculi
Recurrent calcium renal calculi, commonly referred to as recurring kidney stones, are solid deposits predominantly composed of calcium oxalate or calcium phosphate. These stones form…
Recurrent Aphthous Stomatitis
Recurrent aphthous stomatitis (RAS) is a common oral mucosal disorder characterized by recurring, painful ulcers, typically on non-keratinized oral tissues. Though benign and non-contagious, RAS…
Rectal Pain
Rectal pain refers to discomfort or pain originating from the rectal or anal regions. It can be acute or chronic, sharp or dull, and may…
Rectal Gonorrhea
Rectal gonorrhea is a sexually transmitted infection caused by Neisseria gonorrhoeae, a Gram-negative diplococcus. It primarily affects the rectal mucosa following receptive anal intercourse or,…
Rectal Chlamydia Trachomatis Infection
Rectal chlamydia trachomatis infection is a sexually transmitted infection (STI) caused by the bacterium Chlamydia trachomatis, affecting the rectal mucosa. It often results from receptive…
Recrudescent Typhus
Recrudescent typhus, also known as Brill-Zinsser disease, is a late relapse of epidemic typhus caused by Rickettsia prowazekii. This condition typically arises years after the…
Raynaud’s Phenomenon
Raynaud's phenomenon is a vascular disorder characterized by episodic constriction of small arteries, leading to reduced blood flow to extremities, primarily fingers and toes. Triggered…
Rat-Bite Fever
Rat-bite fever is a bacterial infection that can result from a bite or scratch from a rat or other rodent. The condition is rare, but…
Rapid Cycling Bipolar Disorder
Bipolar disorder is a mental health condition characterized by extreme mood swings, including episodes of mania and depression. While the disorder is widely recognized, there…
Raised Seborrheic Keratosis
Seborrheic keratosis is a non-cancerous (benign) skin tumor that appears as a raised, wart-like lesion. Often characterized by a rough, scaly surface, seborrheic keratosis is…