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Biomedical subjects

M G Murdock

Publications and source records attributed to M G Murdock.

8 recordsLinked to original sources
PubMed1982

Spondylolysis following trauma. A case report and review of the literature.

A 31-year-old woman who had an apparently normal lumbosacral spine, developed a unilateral spondylolysis of L4 following injury, and then one year later, roentgenographically showed a bilateral spondylolysis. The cause of spondylolysis was not established, but several theories have been proposed, the most attractive of which is that this condition represents a stress fracture through an area of bone predisposed to fracture. The classifications of spondylolysis and the etiologic theories demonstrate that this case cannot be convincingly classified according to the usual criteria. However, trauma was documented and may have been a significant etiologic factor of spondylolysis.

Adult↗
PubMed1976

Microdose mammography.

Tens of thousands of mammograms are performed daily in the United States. Accumulated radiation biologic data suggest that approximately 90-rad is the level of radition to the breast above which the incidence of cancer may be increase. A microdose system of roentgenography is described that provides better images at one-third to one-fifth the exposure of the commonly used low-dose system and about one-eight to one-tenth the dose of Xeromammography. This system should allow for repeated x-ray study in a patient as required, without exceeding the critical level.

Breast Neoplasms↗
PubMedDate not supplied

Congenital absence of lumbar articular facets. Report of two cases.

X-ray evidence of an absent lumbar facet is usually considered to be indicative of the presence of an osteolytic bone lesion but on rate occasions may be due to a congenital anomaly. Two cases of the congenital absence of a lumbar superior articular facet suggest that this anomaly is not symptom-producing, and in one case was discovered incidentally in a patient without back pain yet led to the performance of a major surgical diagnostic operation. While, rare, a greater awareness of this condition, as clearly defined in the literature on the subject, might occasionally eliminate the need for a similar surgical procedure.

Adolescent↗