Search results
Results from the WOW.Com Content Network
Paragangliomas of the head and neck commonly secrete dopamine, but are referred to as "biochemically silent" because they do not cause the characteristic symptoms associated with a pheochromocytoma. However, methoxytyramine can be utilized to detect the tumors of the head and neck.
Rarely, a pheochromocytoma (tumor of the medullar tissue of the adrenal glands, which are located anterior to the kidney), may result in an adrenergic storm. [20] This type of tumor is not common to begin with, and furthermore, the subtype that can cause massive adrenaline release is rarer still.
They may result in significant morbidity as they may cause organ compression, vascular occlusions, bone destruction, pain and cosmetic issues. Plexiform neurofibromas are seen in 30-50% of patients. [12] Optic pathway gliomas are seen in 15-20% of patients with neurofibromatosis type 1. [12] They most often arise during childhood.
Carotid sinus syncope is due to pressure on the carotid sinus in the neck. [2] The underlying mechanism involves the nervous system slowing the heart rate and dilating blood vessels, resulting in low blood pressure and thus not enough blood flow to the brain. [2] Diagnosis is based on the symptoms after ruling out other possible causes. [3]
Read on to learn what causes the chronic skin condition and what you can do to keep it at bay. Melasma affects up to 33 percent of men and women. Read on to learn what causes the chronic skin ...
The extent of vasoconstriction may be slight or severe depending on the substance or circumstance. Many vasoconstrictors also cause pupil dilation. Medications that cause vasoconstriction include: antihistamines, decongestants, and stimulants. Severe vasoconstriction may result in symptoms of intermittent claudication. [1]
AGS can cause a range of symptoms: mild ones like a rash or hives, or more severe ones such as difficulty breathing, and even anaphylaxis, says infectious disease expert Amesh A. Adalja, M.D ...
Worms and other internal parasites can be treated easily but are some of the most common problems seen in dogs. Some of the internal parasites that cause diarrhea and loose stools in puppies ...