bulla

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Related to tympanic bulla: tympanic sulcus

bulla

 [bul´ah] (pl. bul´lae) (L.)
1. a circumscribed, fluid-containing, elevated lesion of the skin, usually more than 5 mm in diameter. Called also blister and bleb.
2. an anatomical structure with a blisterlike appearance. adj., adj bul´late, bul´lous.

bul·la

, gen. and pl.

bul·lae

(bul'ă, -ē),
1. A fluid-filled blister greater than 1 cm in diameter appearing as a circumscribed area of separation of the epidermis from the subepidermal structure (subepidermal bulla) or as a circumscribed area of separation of epidermal cells (intraepidermal bulla) caused by the presence of serum, or occasionally by an injected substance.
2. A bubblelike structure.
[L. bubble]

bulla

(bo͝ol′ə)
n. pl. bullae (bo͝ol′ē)
Medicine A large blister or vesicle.

bul′lous adj.

bulla

Anatomy
A rounded thin-walled bony prominence.
 
Comparative anatomy
A ovoid prominence below the opening of the ear in the skulls of some mammals, as in the tympanic or auditory bulla.

Dermatology
A large bleb or vesicle filled with serous fluid which may correspond to a separation of the epidermal-dermal junction.
 
Pulmonology
A bleb, see there.

bulla

plural, bullae Anatomy A rounded thin-walled bony prominence Dermatology A large bleb or vesicle filled with serous fluid which may correspond to a separation of the epidermal-dermal junction. See Pemphigus Pulmonology See Emplysema.

bul·la

, pl. bullae (bul'ă, -ē)
1. A large blister appearing as a circumscribed area of separation of the epidermis from subepidermal structures or as a circumscribed area of separation of epidermal cells caused by the presence of serum, or an injected substance.
2. A bubblelike structure.
[L. bubble]

bulla

(bul'a) plural.bullae [L. bulla, bubble, knob]
Enlarge picture
BULLAE OF IMPETIGO
1. A large blister or skin vesicle filled with fluid See: illustration; pompholyx
2. A bleb.

bulla ethmoidalis

A rounded, thin-walled, bony projection into the middle meatus of the nose underneath the middle turbinate bone, formed by an anterior ethmoid sinus.

bulla ossea

The dilated portion of the bony external meatus of the ear.
illustration

bulla

A large blister or vesicle. A thin-walled abnormal cavity filled with liquid or a gas.

bulla

a bony projection.

bulla 

A fluid-filled blister appearing on the surface of the cornea when it is severely oedematous (increased thickness of more than 25%). It gives rise to a reduction of visual acuity and pain on rupturing. Example: bullous keratopathy. Plural: bullae. See bullous keratopathy.

bul·la

, pl. bullae (bul'ă, -ē)
A fluid-filled dermatologic blister greater than 1 cm in diameter.
[L. bubble]

Patient discussion about bulla

Q. What's the best treatment for a blister?

A. use a clean needle and poke a small hole right at the base, between normal skin and the blister. Push the blister down, allow it to drain completely and put a bandaid over it; don't ever rip off blister skin allow it to fall off or reattach naturally.

Q. What are the causes of viral blisters on the skin? For a few months now I've been having these hard viral blisters on my fingers. The only way to get rid of them is with freezed carbon. It does go away with that treatment- after a few weeks but then a new one appears. How can I prevent it from "attacking" again??

A. These viral blisters you are describing are caused by HPV (papilloma virus), and are very hard to get rid of without treatment with freezed carbon. Many of us have the virus but not everyone gets the actual infection. There is not a proved way of preventing from it to happen again after treatment, unfortunately..

More discussions about bulla
References in periodicals archive ?
villosus, in particular, the ellipse seems to be a priori the most adequate expression to be used because is the most assimilable (in external view) to the real shape of the tympanic bulla. However, results showed that similar levels of accuracy and precision were obtained also with the cylinder and the rectangular prism.
The application of a correction factor to the estimated volumes ensured to minimise errors arising from not considering spaces occupied by middle ear ossicles, promontorium, etc., as well as from the possible existing differences between the real shape of the tympanic bulla and the idealised geometric figures considered.
(8,9) The surgical technique described in this report is analogous to a ventral bulla osteotomy, although the quadrate bone was drained and Hushed since birds do not possess a tympanic bulla. If the tympanic membrane had been intact and evidence of active infection was visible on otoscopic examination of this bird, perhaps myringotomy would have been effective for relieving clinical signs.
The nerve was not a direct upwards continuation of the cervical sympathetic trunk and ran caudodorsally very closely alongside with the extra-cranial segment of the internal carotid artery over medial surface of the tympanic bulla to enter the cranial cavity through the petrooccipital fissure (Fig.
Previous publications indicated that approximately 25 % and 5 % of the rostrodorsal part of CCG in the yak and white yak was laterally covered by the tympanic bulla, respectively.
Ventral view of the skull of female blackbuck showing foramen magnum (a), occipital condyle (b), paracondylar process (c), jugular foramen (d), tympanic bulla (e), muscular process (f), temporal fossa (g), zygomatic arch (h), spehno-palatine foramen (i), horizontal plate of palatine bone (j), palatine process of maxilla (k), palatine process of incisive bone (l), palatine fissure (m), incisive bone (n), incisive fissure (o), major palatine foramen (p), maxilla (q), vomer (r), pterygoid (s), oval foramen (t).
KEY WORDS: Chaetophractus villosus; Chaetophractus vellerosus; Zaedyus pichiy; Middle ear; Tympanic bulla.
The bony covering of the middle ear, the tympanic bulla, has been extensively studied in a fairly large number of mammalian groups.