Kidney stone disease, also known as nephrolithiasis or urolithiasis, is a crystallopathy where a solid piece of material (kidney stone) develops in the urinary tract. Kidney stones typically form in the kidney and leave the body in the urine stream. A small stone may pass without causing symptoms. If a stone grows to more than 5 millimeters (0.2 inches), it can cause blockage of the ureter, resulting in sharp and severe pain in the lower back or abdomen. A stone may also result in blood in the urine, vomiting, or painful urination. About half of people who have had a kidney stone will have another within ten years.Most stones form by a combination of genetics and environmental factors. Risk factors include high urine calcium levels, obesity, certain foods, some medications, calcium supplements, hyperparathyroidism, gout and not drinking enough fluids. Stones form in the kidney when minerals in urine are at high concentration. The diagnosis is usually based on symptoms, urine testing, and medical imaging. Blood tests may also be useful. Stones are typically classified by their location: nephrolithiasis (in the kidney), ureterolithiasis (in the ureter), cystolithiasis (in the bladder), or by what they are made of (calcium oxalate, uric acid, struvite, cystine).In those who have had stones, prevention is by drinking fluids such that more than two liters of urine are produced per day. If this is not effective enough, thiazide diuretic, citrate, or allopurinol may be taken. It is recommended that soft drinks containing phosphoric acid (typically colas) be avoided.
Acne miliaris necrotica is a rare condition consisting of follicular vesicopustules, sometimes occurring as solitary lesions that are usually very itchy. The condition affects middle aged and elderly individuals. Affected areas can include the scalp, frontal hairline, face, and chest. Causes
It has been hypothesized that the body overreacts to an organism such as the S. aureus bacterium. Diagnosis
Treatment
There are multiple medications that are able to treat acne varioliformis. Topical
Clindamycin 1% lotion or Benzoyl peroxide/clindamycin gel
Erythromycin 2% gel
1% hydrocortisone cream

Systemic
Doxycycline 50 mg twice daily
Isotretinoin 0.5 mg/kg daily

See also
List of cutaneous conditions

References


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