medullary cavity

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Related to medullary cavity: bone marrow, Intramembranous ossification


1. a hollow or space, or a potential space, within the body or one of its organs; called also caverna and cavum.
2. the lesion produced by dental caries.
Cavities in the body. From Applegate, 2000.
abdominal cavity the cavity of the body between the diaphragm above and the pelvis below, containing the abdominal organs.
absorption c's cavities in developing compact bone due to osteoclastic erosion, usually occurring in the areas laid down first.
amniotic cavity the closed sac between the embryo and the amnion, containing the amniotic fluid.
cranial cavity the space enclosed by the bones of the cranium.
glenoid cavity a depression in the lateral angle of the scapula for articulation with the humerus.
marrow cavity (medullary cavity) the cavity that contains bone marrow in the diaphysis of a long bone; called also medullary canal.
nasal cavity the proximal portion of the passages of the respiratory system, extending from the nares to the pharynx; it is divided into left and right halves by the nasal septum and is separated from the oral cavity by the hard palate.
oral cavity the cavity of the mouth, bounded by the jaw bones and associated structures (muscles and mucosa).
pelvic cavity the space within the walls of the pelvis.
pericardial cavity the potential space between the epicardium and the parietal layer of the serous pericardium.
peritoneal cavity the potential space between the parietal and the visceral peritoneum.
pleural cavity the potential space between the two layers of pleura.
pulp cavity the pulp-filled central chamber in the crown of a tooth.
cavity of septum pellucidum the median cleft between the two laminae of the septum pellucidum. Called also pseudocele, pseudocoele, and fifth ventricle.
serous cavity a coelomic cavity, like that enclosed by the pericardium, peritoneum, or pleura, not communicating with the outside of the body and lined with a serous membrane, i.e., one which secretes a serous fluid.
tension cavity cavities of the lung in which the air pressure is greater than that of the atmosphere.
thoracic cavity the portion of the ventral body cavity situated between the neck and the diaphragm; it contains the pleural cavity.
tympanic cavity the major portion of the middle ear, consisting of a narrow air-filled cavity in the temporal bone that contains the auditory ossicles and communicates with the mastoid air cells and the mastoid antrum by means of the aditus and the nasopharynx by means of the auditory tube. The middle ear and the tympanic cavity were formerly regarded as being synonymous.
uterine cavity the flattened space within the uterus communicating proximally on either side with the fallopian tubes and below with the vagina.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

med·ul·lar·y cav·i·ty

the marrow cavity in the shaft of a long bone.
Farlex Partner Medical Dictionary © Farlex 2012

medullary cavity

The hollow spaces of the diaphyses of long bones, which house the marrow.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

med·ul·lar·y ca·vi·ty

(med'ŭ-lar'ē kav'i-tē) [TA]
The marrow cavity in the shaft of a long bone.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Sclerotic bone was developed in the medullary cavity after the internal fixation of intertrochanteric fracture, which should be removed during the reaming so that the prosthesis fit in perfectly.
Medullary cavity diameter was greatest in group A followed by group B and group C had least diameter.
As the secondaries spread within medullary cavity rapidly, recommended treatment is local irradiation of entire bone (humerus) with re-irradiation of primary site that had previously received a high dose of radiation.
I also noted that inserting a stem into the canal destroys the endosteum, a thin layer of connective tissue filled with cortical capillaries that lines the medullary cavity. I further developed a hypothesis, to be experimentally verified, that an implant with specially added side elements called "fins" could initiate bone regeneration in the circular direction [110].
Radiographs from day 42 postoperatively demonstrated increased opacification of the medullary cavity. This was attributed to bone metabolism; however, resolving concurrent osteomyelitis could not be ruled out.
The medullary cavity of the proximal fragment was opened and the larger piece of the fibular strut graft was inserted into the medullary cavity proximally.
There is decreased resorption leading to excessive accumulation of bone matrix which causes hard, dense bones with narrow medullary cavity.
Plain radiograph of the left femur revealed segmental mid diaphyseal concentric cortical thickening and sclerosis also involving the medullary cavity (Figure 1A).
As the pin was driven proximally, an effort was made to direct it along the cranio-lateral surface of medullary cavity. The proximal bone fragment was adducted until it is parallel to surface of table and held in rotation and angulation of normal standing position as the pin penetrates the proximal bone and soft tissues.
An elevated skeletal density and abundant formation of the bones are the features that characterize osteopetrosis, which is a rare genetic disorder; it destroys the medullary cavity, resulting in extramedullary hematopoiesis, hepatosplenomegaly, anemia, and thrombocytopenia.
Central ossifying fibromas arise from the endosteum or the periodontal ligament adjacent to the root apex and causes expansion of the medullary cavity. The peripheral type occurs on the soft tissue covering the tooth bearing areas of the jaws.