Do not know whether to go to ENT or Neurologist or Onco or Interventionist or ???? Pl. talk to ur friend doctor if any and advise......Alok
Why I went for MRI: I hv a Right optic nerve and chiasm atrophy means right eye optic nuritis. Besides I hv constant headache on right side.
Mastoiditis
From Wikipedia, the free encyclopedia
Mastoiditis is the result of an infection that extends to the air cells of the
skull
behind the ear. Specifically, it is an inflammation of the mucosal
lining of the mastoid antrum and mastoid air cell system inside
[1] the
mastoid process. The mastoid process is the portion of the
temporal bone of the skull that is behind the ear which contains open,
air-containing spaces.
[2][3] Mastoiditis is usually caused by untreated acute
otitis media (middle ear infection) and used to be a leading cause of child mortality. With the development of
antibiotics,
however, mastoiditis has become quite rare in developed countries where
surgical treatment is now much less frequent and more conservative,
unlike former times.
[2] Untreated, the infection can spread to surrounding structures, including the brain, causing serious complications.
[4]
Features
Some common
symptoms and
signs of mastoiditis include
pain, tenderness, and swelling in the mastoid region. There may be ear pain (
otalgia), and the ear or mastoid region may be red (erythematous). Fever or headaches may also be present. Infants usually show
nonspecific symptoms, including
anorexia,
diarrhea, or
irritability. Drainage from the ear occurs in more serious cases, often manifest as brown discharge on the pillowcase upon waking.
[4][5]
Diagnosis
Mastoiditis with subperiostal abscess
The diagnosis of mastoiditis is clinical—based on the
medical history and
physical examination. Imaging studies provide additional information; The standard method of diagnosis is via
MRI scan although a
CT scan
is a common alternative as it gives a clearer and more useful image to
see how close the damage may have gotten to the brain and facial nerves.
Planar (2-D)
X-rays are not as useful. If there is drainage, it is often sent for
culture, although this will often be negative if the patient has begun taking antibiotics.
Exploratory surgery is often used as a last resort method of diagnosis to see the mastoid and surrounding areas.
[2][6]
Pathophysiology
The pathophysiology of mastoiditis is straightforward: bacteria spread from the middle ear to the
mastoid air cells, where the inflammation causes damage to the bony structures.
Streptococcus pneumoniae, Streptococcus pyogenes, Staphylococcus aureus, Haemophilus influenzae, and
Moraxella catarrhalis are the most common organisms recovered in acute mastoiditis. Organisms that are rarely found are
Pseudomonas aeruginosa and other Gram-negative aerobic bacilli, and anaerobic bacteria.
[7] P. aeruginosa, Enterobacteriaceae,
S. aureus and
anaerobic bacteria (
Prevotella,
Bacteroides,
Fusobacterium, and
Peptostreptococcus spp. ) are the most common isolates in chronic mastoiditis.
[8] Rarely,
Mycobacterium species can also cause the infection. Some mastoiditis is caused by
cholesteatoma,
which is a sac of keratinizing squamous epithelium in the middle ear
that usually results from repeated middle-ear infections. If left
untreated, the cholesteatoma can erode into the mastoid process,
producing mastoiditis, as well as other complications.
[4]
Prevention and treatment
In general, mastoiditis is rather simple to prevent. If the patient
with an ear infection seeks treatment promptly and receives complete
treatment, the antibiotics will usually cure the infection and prevent
its spread. For this reason, mastoiditis is rare in developed countries.
However, the rise of "superbugs" that are resistant to conventional
antibiotics increases the risk that ear infections will worsen into
mastoiditis. Most ear infections occur in infants as the eustachian
tubes are not fully developed and don't drain readily.
In the United States the primary treatment for mastoiditis is administration of
intravenous antibiotics. Initially, broad-spectrum antibiotics are given, such as
ceftriaxone.
As culture results become available, treatment can be switched to more
specific antibiotics directed at the eradication of the recovered
aerobic and
anaerobic bacteria.
[8] Long-term antibiotics may be necessary to completely eradicate the infection.
[4]
If the condition does not quickly improve with antibiotics, surgical
procedures may be performed (while continuing the medication). The most
common procedure is a
myringotomy, a small incision in the
tympanic membrane (eardrum), or the insertion of a
tympanostomy tube into the eardrum.
[6]
These serve to drain the pus from the middle ear, helping to treat the
infection. The tube is extruded spontaneously after a few weeks to
months, and the incision heals naturally. If there are complications, or
the mastoiditis does not respond to the above treatments, it may be
necessary to perform a
mastoidectomy: a procedure in which a portion of the bone is removed and the infection drained.
[4]
Attack triangle in mastoidectomies
Prognosis
With prompt treatment, it is possible to cure mastoiditis. Seeking
medical care early is important. However, it is difficult for
antibiotics to penetrate to the interior of the mastoid process and so
it may not be easy to cure the infection; it also may recur. Mastoiditis
has many possible complications, all connected to the infection
spreading to surrounding structures.
Hearing loss is likely, or inflammation of the
labyrinth of the
inner ear (
labyrinthitis) may occur, producing
vertigo
and an ear ringing may develop along with the hearing loss, making it
more difficult to communicate. The infection may also spread to the
facial nerve (cranial nerve VII), causing
facial-nerve palsy,
producing weakness or paralysis of some muscles of facial expression,
on the same side of the face. Other complications include
Bezold's abscess, an abscess (a collection of pus surrounded by inflamed tissue) behind the
sternocleidomastoid muscle in the neck, or a
subperiosteal abscess,
between the periosteum and mastoid bone ( resulting in the typical
appearance of a protruding ear). Serious complications result if the
infection spreads to the brain. These include
meningitis (inflammation of the protective membranes surrounding the brain),
epidural abscess (abscess between the skull and outer membrane of the brain), dural venous
thrombophlebitis (inflammation of the
venous structures of the brain), or
brain abscess.
[2][4]
Epidemiology
In the United States and other developed countries, the
incidence
of mastoiditis is quite low, around 0.004%, although it is higher in
developing countries. The condition most commonly affects children aged
from two to thirteen months, when ear infections most commonly occur.
Males and females are equally affected.
[3]
References
- ^ Diseases of ear nose & throat by PL dhingra & shruti dhingra. published by elsevier
- ^ a b c d "Mastoiditis". MedlinePlus Medical Encyclopedia. Retrieved July 30, 2003.
- ^ a b "Ear Infections – Treatment". webmd.com. Retrieved 24 November 2008.
- ^ a b c d e f Young, Tesfa. "Mastoiditis". eMedicine. Retrieved June 10, 2005.
- ^ "What to Do About Ear infections". webmd.com. Retrieved 24 November 2008.
- ^ a b Bakhos
D, Trijolet JP, Morinière S, Pondaven S, Al Zahrani M, Lescanne E (2011
Apr). "Conservative management of acute mastoiditis in children". Arch Otolaryngol Head Neck Surg. 137(4): 346–50.
- ^ Nussinovitch
M, Yoeli R, Elishkevitz K, Varsano I (2004). "Acute mastoiditis in
children: epidemiologic, clinical, microbiologic, and therapeutic
aspects over past years". Clin Pediatr (Phila) 43: 261–7.
- ^ a b Brook I (2005). "The role of anaerobic bacteria in acute and chronic mastoiditis". Anaerobe 11: 252–7.
Further reading
- Durand, Marlene & Joseph, Michael. (2001). Infections of the
Upper Respiratory Tract. In Eugene Braunwald, Anthony S. Fauci, Dennis
L. Kasper, Stephen L. Hauser, Dan L. Longo, & J. Larry Jameson
(Eds.), Harrison's Principles of Internal Medicine (15th Edition), p. 191. New York: McGraw-Hill
- Cummings CW, Flint PW, Haughey BH, et al. Otolaryngology: Head & Neck Surgery. 4th ed. St Louis, Mo; Mosby; 2005:3019–3020.
- Mastoiditis E Medicine
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Maxillary sinus
From Wikipedia, the free encyclopedia
The pyramid-shaped
maxillary sinus (or antrum of Highmore) is the largest of the
paranasal sinuses, and drains into the middle meatus of the nose.
[1]
Development
It is present at birth as rudimentary air cells, and develops throughout childhood.
Discovery
The maxillary sinus was first discovered and illustrated by
Leonardo da Vinci, but the earliest attribution of significance was given to
Nathaniel Highmore, the British surgeon and anatomist who described it in detail in his 1651 treatise.
[2]
Structure
Found in the
body of the maxilla,
this sinus has three recesses: an alveolar recess pointed inferiorly,
bounded by the alveolar process of the maxilla; a zygomatic recess
pointed laterally, bounded by the zygomatic bone; and an infraorbital
recess pointed superiorly, bounded by the inferior orbital surface of
the maxilla. The medial wall is composed primarily of cartilage. The
ostia for drainage are located high on the medial wall and open into the
semilunar hiatus
of the lateral nasal cavity; because of the position of the ostia,
gravity cannot drain the maxillary sinus contents when the head is erect
(see pathology). The ostium of the maxillary sinus is high up on the
medial wall and on average is 2.4 mm in diameter; with a mean volume of
about 10 ml.
[3][1] Stand near the person during an extraoral examination to visually inspect and bilaterally palpate the maxillary sinuses.
[4]
The sinus is lined with
mucoperiosteum,
with cilia that beat toward the ostia. This membrane is also referred
to as the "Schneiderian Membrane", which is histologically a bilaminar
membrane with ciliated columnar epithelial cells on the internal (or
cavernous) side and periosteum on the osseous side. The size of the
sinuses varies in different skulls, and even on the two sides of the
same skull.
[3]
The
infraorbital canal
usually projects into the cavity as a well-marked ridge extending from
the roof to the anterior wall; additional ridges are sometimes seen in
the posterior wall of the cavity and are caused by the alveolar canals.
The mucous membranes receive their
postganglionic parasympathetic nerve innervation for
mucous secretion
originating from the greater petrosal nerve (a branch of the facial
nerve). The superior alveolar (anterior, middle, and posterior) nerves,
branches of the maxillary nerve provide sensory innervation.
Nasal wall/base
Its nasal wall, or base, presents, in the disarticulated bone, a large, irregular aperture, communicating with the
nasal cavity.
In the articulated skull this aperture is much reduced in size by the following bones:
The sinus communicates through an opening into the
semilunar hiatus on the lateral nasal wall.
Posterior wall
On the posterior wall are the
alveolar canals, transmitting the
posterior superior alveolar vessels and
nerves to the
molar teeth.
Floor
The maxillary sinus can normally be seen above the level of the premolar and molar teeth in the
upper jaw. This
dental x-ray film shows how, in the absence of the second premolar and first molar, the sinus became
pneumatized and expanded towards the crest of the alveolar process (location at which the bone meets the gum tissue).
The floor is formed by the
alveolar process of the maxilla,
and, if the sinus is of an average size, is on a level with the floor
of the nose; if the sinus is large it reaches below this level.
Projecting into the floor of the antrum are several conical
processes, corresponding to the roots of the first and second maxillary
molar teeth; in some cases the floor can be perforated by the apices of the teeth.
Pathology
Maxillary sinusitis
Maxillary
sinusitis is
inflammation
of the maxillary sinuses. The symptoms of sinusitis are headache,
usually near the involved sinus, and foul-smelling nasal or pharyngeal
discharge, possibly with some systemic signs of infection such as fever
and weakness. The skin over the involved sinus can be tender, hot, and
even reddened due to the inflammatory process in the area. On
radiographs, there is opacification (or cloudiness) of the usually
translucent sinus due to retained mucus.
[4]
Maxillary sinusitis is common due to the close anatomic relation of the frontal sinus, anterior
ethmoidal sinus
and the maxillary teeth, allowing for easy spread of infection.
Differential diagnosis of dental problems needs to be done due to the
close proximity to the teeth since the pain from sinusitis can seem to
be dentally related.
[1]
Furthermore, the drainage orifice lies near the roof of the sinus, and
so the maxillary sinus does not drain well, and infection develops more
easily. The maxillary sinus may drain into the
mouth via an abnormal opening, an oroantral
fistula, a particular risk after tooth extraction.
Sinusitis treatment
Traditionally the treatment of acute maxillary sinusitis is usually
prescription of a broad-spectrum cephalosporin antibiotic resistant to
beta-lactamase, administered for 10 days. Recent studies have found that
the cause of chronic sinus infections lies in the nasal mucus, not in
the nasal and sinus tissue targeted by standard treatment. This suggests
a beneficial effect in treatments that target primarily the underlying
and presumably damage-inflicting nasal and sinus membrane inflammation,
instead of the secondary bacterial infection that has been the primary
target of past treatments for the disease. Also, surgical procedures
with chronic sinus infections are now changing with the direct removal
of the mucus, which is loaded with toxins from the inflammatory cells,
rather than the inflamed tissue during surgery. Leaving the mucus behind
might predispose early recurrence of the chronic sinus infection. If
any surgery is performed, it is to enlarge the ostia in the lateral
walls of the nasal cavity, creating adequate drainage.
[4]
Cancer
Carcinoma of the maxillary sinus may invade the palate and cause
dental pain. It may also block the nasolacrimal duct. Spread of the
tumor into the orbit causes proptosis.
[1]
Age
With age, the enlarging maxillary sinus may even begin to surround
the roots of the maxillary posterior teeth and extend its margins into
the body of the zygomatic bone. If the maxillary posterior teeth are
lost, the maxillary sinus may expand even more, thinning the bony floor
of the alveolar process so that only a thin shell of bone is present.
[4]
Additional Images
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Mastoiditis is an infection of the mastoid bone of the skull. The mastoid is located just behind the ear.
Causes
Mastoiditis is usually caused by a middle ear infection (
acute otitis media).
The infection may spread from the ear to the mastoid bone of the skull.
The mastoid bone fills with infected materials and its honeycomb-like
structure may deteriorate.
Mastoiditis usually affects children.
Before antibiotics, mastoiditis was one of the leading causes of death
in children. Now it is a relatively uncommon and much less dangerous
condition.
Symptoms
Exams and Tests
An examination of the head may reveal signs of mastoiditis. The following tests may show an abnormality of the mastoid bone:
A culture of drainage from the ear may show bacteria.
Treatment
Mastoiditis
may be difficult to treat because medications may not reach deep enough
into the mastoid bone. It may require repeated or long-term treatment.
The infection is treated with antibiotics by injection, then antibiotics
by mouth.
Surgery to remove part of the bone and drain the mastoid (
mastoidectomy) may be needed if antibiotic therapy is not successful. Surgery to drain the middle ear through the eardrum (
myringotomy) may be needed to treat the middle ear infection.
Outlook (Prognosis)
Mastoiditis is curable with treatment. However, it may be hard to treat and may come back.
Possible Complications
When to Contact a Medical Professional
Call your health care provider if you have symptoms of mastoiditis.
Call for an appointment with your health care provider if:
- You have an ear infection that does not respond to treatment or is followed by new symptoms
- Your symptoms do not respond to treatment
Prevention
Promptly and completely treating ear infections reduces the risk of mastoiditis.
References
Chole RA, Sudhoff HH. Chronic otitis media, mastoiditis, and petrositis. In: Flint PW, Haughey BH, Lund LJ, et al, eds.
Cummings Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, Pa: Mosby Elsevier; 2010:chap 139.
Klein JO. Otitis externa, otitis media, and mastoiditis. In:Mandell GL, Bennett JE, Dolin R, eds.
Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2009:chap57.
O’Handley JG, Tobin EJ, Shah AR. Otorhinolaryngology. In: Rakel RE, ed.
Textbook of Family Medicine. 8th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 19.
Update Date: 8/30/2012
Updated
by: Linda J. Vorvick, MD, Medical Director and Director of Didactic
Curriculum, MEDEX Northwest Division of Physician Assistant Studies,
Department of Family Medicine, UW Medicine, School of Medicine,
University of Washington. Seth Schwartz, MD, MPH, Otolaryngologist,
Virginia Mason Medical Center, Seattle, Washington. Also reviewed by
David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix,
Inc