Melena

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  Hypopigmentation

  Hypopigmentation is the loss of skin color. It is caused by melanocyte or melanin depletion, or a decrease in the amino acid tyrosine, which is used by melanocytes to make melanin. Oftentimes, hypopigmentation can be brought on by laser treatments; however, the hypopigmentation can be treated with...
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  Intestinal Obstruction

  Bowel obstruction (or intestinal obstruction) is a mechanical or functional obstruction of the intestines, preventing the normal transit of the products of digestion. It can occur at any level distal to the duodenum of the small intestine and is a medical emergency. The condition is often treated...
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  Peptic ulcer

  A peptic ulcer, also known as PUD or peptic ulcer disease, is the most common ulcer of an area of the gastrointestinal tract that is usually acidic and thus extremely painful. It is defined as mucosal erosions equal to or greater than 0.5 cm. As many as 70–90% of such ulcers are associated with...

• Orthostatic hypotension

  Orthostatic hypotension, also known as postural hypotension,, and colloquially as head rush or dizzy spell, is a form of hypotension in which a person's blood pressure suddenly falls when standing up or stretching. The symptom is caused by blood pooling in the lower extremities upon a change in...

• Spinal tumor

  Spinal tumors are neoplasms located in the spinal cord. They are mostly metastases from primary cancers elsewhere (commonly breast, prostate and lung cancer). Primary tumors may be benign (e.g. hemangioma) or malignant in nature. Depending on their location, the spinal cord tumors can be: The...

• Pretibial myxedema

  Pretibial myxedema (myxoedema (UK), aka thyroid dermopathy ) is an infiltrative dermopathy, resulting as a rare complication of Graves' disease, with an incidence rate of about 1-5% in patients. It usually presents itself as a waxy, discolored induration of the skin—classically described as having...