What is a orbital pseudotumor?
Orbital pseudotumor is the swelling of tissue behind the eye in an area called the orbit. The orbit is the hollow space in the skull where the eye sits. The orbit protects the eyeball and the muscles and tissue that surround it.
What causes orbital pseudotumor?
The etiology of orbital pseudotumor is unknown, but infection, autoimmune disorder, and aberrant wound healings have been put forward as possibilities. The disorder has also been associated with infectious diseases such as Streptococcal pharyngitis, viral upper respiratory infection and Borrelia burgdorferi infection.
Does orbital myositis go away?
Complications of Orbital Myositis A prompt and proper diagnosis, with prompt and proper treatment, can dramatically improve symptoms in the majority of patients and may eliminate the disease altogether, although this is not a cure, as there is no cure at this time.
What is inflammatory pseudotumor?
Inflammatory pseudotumor is a quasineoplastic lesion that most commonly involves the lung and the orbit, but it has been reported to occur in nearly every site in the body.
Is orbital pseudotumor curable?
Orbital Inflammatory Pseudotumor Treatment In situations where the orbital inflammatory pseudotumor is mild, the inflammation may resolve without treatment. Many inflammatory pseudotumors are treated with steroid therapy. However, severe cases may cause damaging pressure on the eye.
How is orbital myositis treated?
Acute orbital myositis will often respond to systemic corticosteroids at doses of 60 to 120 mg prednisone/day for two weeks, with subsequent tapering over weeks to months (18). Prompt treatment is associated with dramatic improvement in symptoms, and a reduced risk of muscle fibrosis and recurrence.
How common is orbital myositis?
Idiopathic orbital myositis (IOM) is a rare clinical condition characterized by idiopathic inflammation primarily involving the extraocular muscles. It most commonly affects patients in the third decade of life, with a female predilection (1).
What is pseudotumor of liver?
An inflammatory pseudotumor of the liver is an uncommon, benign, tumor-like lesion that sometimes mimics a malignant tumor, particularly metastatic disease or cholangiocarcinoma.
How does dx2-dy2 orbital have two nodal planes?
The 2s orbital has a nodal shell, whereas the 2pz orbital or 2p orbitals have a nodal plane. so, when u will look the representation of these orbitals in crystal field theory , then u can easily detect that here dx2-dy2 orbital.. and x+y = 0 and x-y = 0 are the nodal planes, beacuse there are no probability of finding the electron their .
Is there such a thing as orbital pseudotumor?
Many terms are used interchangeably in the literature to refer to idiopathic orbital inflammation including orbital pseudotumor, non-specific orbital inflammation and orbital inflammatory syndrome. Patients typically present with rapid-onset, usually unilateral (~90% of cases), painful proptosis and diplopia.
Where does idiopathic orbital pseudotumour occur in the body?
Idiopathic orbital inflammation (IOI), also known as orbital pseudotumour and nonspecific orbital inflammation, is an idiopathic inflammatory condition that most commonly involves the extraocular muscles. Less commonly there is inflammatory change involving the uvea, sclera, lacrimal gland, and retrobulbar soft tissue.
Why are d z 2 and d x y orbitals named?
They are named because of their shapes. First, the d z 2 orbital is actually short for d 2 z 2 − x 2 − y 2, which is sometimes written as d 3 z 2 − r 2, and represents a wavefunction which is proportional to 3 z 2 − r 2 r 2. The d x y orbital is proportional to x y r 2, and so on.