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Biomedical subjects

P W Myers

Publications and source records attributed to P W Myers.

15 recordsLinked to original sources
PubMed1991

Obstructing nasopharyngeal teratoma in the neonate. A report of two cases.

True teratomas of the nasopharynx are rare tumors of the newborn. Surgical resection is the treatment of choice. We describe two patients with this entity. The first patient has undergone follow-up for over 10 years, while the second patient was evaluated with fine-needle aspiration and magnetic resonance imaging. The advantages of these studies and alternate surgical techniques are discussed. Of interest is the fact that both patients may have had central nervous system abnormalities.

Child↗
PubMed1977

Approaches to diagnosis and management of a lumg in the neck.

Malignancies of the head and neck constitute 15 percent of the malignancies of all patients seen with cancer. Those individuals who present with neck masses deserve appropriate physical and diagnostic work-up before any surgical or therapeutic approaches are contemplated. In the series of patients presented here, only six percent had unknown primary lesions.

Adult↗
PubMed1972

Dynamics of the cerebrospinal fluid and the spinal dura mater.

DURING MYELOGRAPHY WE OBSERVED THE CONTRAST MATERIAL IN THE SPINAL SUBARACHNOID SPACE WHILE WE CHANGED: (1) the intracranial blood volume by CO(2) inhalation, hyperventilation, and jugular vein compression; (2) the intra-abdominal and intrathoracic pressure by forced expiration with glottis closed; and (3) the CSF volume by withdrawals and reinjections of fluid. The spinal dural sac enlarges with increases in volume of both intracranial blood and CSF. It partially collapses with reductions in volume of both intracranial blood and CSF. With increases in intra-abdominal and intrathoracic pressure, the thoracolumbar sac partially collapses, while the cervical sac enlarges. From these observations we conclude that the spinal dural sac is a dynamic structure, readily changing its capacity in response to prevailing pressure gradients across its walls. It acts as a reservoir for CSF, which moves to and fro through the foramen magnum in response to changes in cerebral blood flow. By its bladder-like ability to alter its capacity, the spinal dural sac provides the `elasticity' of the covering of the central nervous system.

Blood Volume↗