Medical term:

osteoma

[os″te-o´mah]

a tumor, benign or malignant, composed of bony tissue; a hard tumor of bonelike structure developing on a bone (homoplastic osteoma) or other structures (heteroplastic osteoma).

Symptoms. Symptoms of bone cancer are pain, swelling, and disability in the area of the diseased bone. The pain at first is mild, stops and starts again, and then becomes increasingly severe. Swelling may appear soon after the first signs of pain, but often it cannot be seen until later. The disability may affect a nearby joint, such as the knee, shoulder, or hip. There may also be a hard, painful lump over which the skin moves freely. The skin temperature in the area may be slightly elevated.

Diagnosis and Treatment. Diagnosis of bone tumor is made after examination of x-ray film and a microscopic study of the suspected tissue. Malignant tumors can be treated by radiotherapy and surgery during the early stage of development. The prognosis for these tumors is grave, however. Hormone therapy and medication can also be helpful in certain types of the disease.

osteoma cu´tis progressive dermal ossification during childhood, with development of hard, round to irregular nodules representing islands of heterotopic bone within the dermis or subcutis, followed by coalescence of the lesions into plaques, and later by invasion of ossification into deep connective tissues. It may be sporadic or inherited as an autosomal dominant trait. Called also progressive osseous heteroplasia.

osteoma du´rum (osteoma ebur´neum) one containing hard bony tissue.

osteoma medulla´re one containing marrow spaces.

osteoid osteoma see osteoid osteoma.

osteoma spongio´sum (spongy osteoma) one containing cancellated bone.

os·te·o·ma

(os'tē-ō'mă),

A benign, slow-growing mass of mature, predominantly lamellar bone, usually arising from the skull or mandible.

[osteo- + G. -oma, tumor]

Farlex Partner Medical Dictionary © Farlex 2012

osteoma

(ŏs′tē-ō′mə)

n. pl. osteo·mas or osteo·mata (-mə-tə)

A benign tumor composed of bony tissue, often developing on the skull.

os·te·o·ma

(os'tē-ō'mă)

A benign slow-growing mass of mature, predominantly lamellar bone, usually arising from the skull or mandible.

[osteo- + G. -oma, tumor]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

osteoma

A BENIGN tumour of bone, largely confined to the skull and jawbone. Osteomas often arise in a sinus or in the ORBIT, are slow-growing and can be removed if causing cosmetic or other problems.

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

os·te·o·ma

(os'tē-ō'mă)

Benign, slow-growing mass of mature, predominantly lamellar bone, usually arising from the cranium or mandible.

[osteo- + G. -oma, tumor]

Medical Dictionary for the Dental Professions © Farlex 2012

osteomalacia

[os″te-o-mah-la´shah]

softening of the bones, resulting from impaired mineralization, with excess accumulation of osteoid, caused by a vitamin D deficiency in adults. A similar condition in children is called rickets. The deficiency may be due to lack of exposure to ultraviolet rays, inadequate intake of vitamin D in the diet, or failure to absorb or utilize vitamin D. There is decalcification of the bones, particularly those of the spine, pelvis, and lower extremities. X-ray examination reveals transverse, fracture-like lines in the affected bones and areas of demineralization in the matrix of the bone. As the bones soften they become bent, flattened, or otherwise deformed. Treatment consists of administration of large daily doses of vitamin D and dietary measures to insure adequate calcium and phosphorus intake. adj., adj osteomala´cic.

antacid-induced osteomalacia osteomalacia in which the combination of low dietary phosphorus intake and chronic excessive consumption of aluminum hydroxide–containing antacids has led to phosphate depletion; characteristics include hypophosphatemia, nephrolithiasis, anorexia, muscle weakness, and bone loss.

anticonvulsant osteomalacia

1. osteomalacia occurring in anticonvulsant rickets of children.

2. anticonvulsant rickets in adults.

hepatic osteomalacia osteomalacia as a complication of cholestatic liver disease, which may lead to severe bone pain and multiple fractures.

oncogenic osteomalacia a type seen in association with usually benign mesenchymal neoplasms. The tumors appear to produce a substance that impairs renal tubular functions and leads to hypophosphatemia. Called also tumor-induced osteomalacia.

puerperal osteomalacia a type resulting from exhaustion of skeletal stores of calcium and phosphorus by repeated pregnancies and lactation.

renal tubular osteomalacia a type resulting from acidosis and hypercalciuria when deficient renal tubular activity has caused inability to produce acid urine or ammonia.

senile osteomalacia softening of bones in old age due to vitamin D deficiency.

tumor-induced osteomalacia oncogenic osteomalacia.

os·te·o·ma·la·ci·a

(os'tē-ō-mă-lā'shē-ă),

A disease in adults characterized by a gradual softening and bending of the bones with varying severity of pain; softening occurs because the bones contain osteoid tissue that has failed to calcify because of lack of vitamin D or renal tubular dysfunction; more common in women than in men, osteomalacia often begins during pregnancy.

Synonym(s): adult rickets, late rickets, rachitis tarda

[osteo- + G. malakia, softness]

osteomalacia

(ŏs′tē-ō-mə-lā′shə, -shē-ə)

A bone disease in adults analogous to rickets in children, marked by bone demineralization caused by impaired metabolism or deficiency of vitamin D or phosphorus.

osteomalacia

Nutritional rickets A condition characterized by softened bones due to poor mineralization occurring in a background of vitamin D deficiency Clinical Weak, deformed, and deformable bone, which in children may be manifest by craniotabes, bowlegs, and knock knees, rachitic rosary, ↓ ventilation, often accompanied by pneumonia, muscular weakness, ↓ appetite, hypocalcemia Treatment Vitamin D. See Osteogenic osteomalacia, Rickets.

os·te·o·ma·la·ci·a

(os'tē-ō-mă-lā'shē-ă)

A disease characterized by a gradual softening and bending of the bones with varying severity of pain; softening occurs because the bones contain osteoid tissue which has failed to calcify due to lack of vitamin D or renal tubular dysfunction.
Synonym(s): adult rickets, late rickets.

[osteo- + G. malakia, softness]

osteomalacia

Bone softening as a result of defective mineralization, usually occurring because of defective calcium absorption from vitamin D deficiency. Osteomalacia is commoner in women than in men. The softened bones may distort or bend under the body weight. The condition is treated with vitamin D.

Osteomalacia

Osteomalacia is a bone disease that occurs in adults and is caused by a prolonged period of vitamin D deficiency.

Mentioned in: Bone X Rays, Laxatives, Vitamin D Deficiency

os·te·o·ma·la·ci·a

(os'tē-ō-mă-lā'shē-ă)

Disease in adults characterized by a gradual softening and bending of bones with varying severity of pain.
Synonym(s): adult rickets.

[osteo- + G. malakia, softness]

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