Search PubMed⌕ Search

Biomedical subjects

H D Curtin

Publications and source records attributed to H D Curtin.

At least 91 records · Page 5Linked to original sources
PubMed1987

Separation of the masticator space from the parapharyngeal space.

The separation of the masticator and parapharyngeal spaces is somewhat ambiguous. Anatomic specimens were dissected to define better the fascial layer representing the medial wall of the masticator space. A fascial layer was found extending from the medial pterygoid muscle to the skull base separating the masticator from the parapharyngeal space. The third branch of the trigeminal nerve was lateral to this fascial layer and thus passed through the masticator space. Clinical cases were reviewed. Tumors could be confidently assigned to the masticator, prestyloid, or poststyloid parapharyngeal spaces. Benign salivary gland tumors were found in the prestyloid parapharyngeal space only.

Face↗
PubMed1987

Tumors of the parapharyngeal space and upper neck: MR imaging characteristics.

Magnetic resonance (MR) imaging characteristics of 40 tumors involving the parapharyngeal space and the upper part of the neck were reviewed. These lesions could be classified as being either hypervascular (glomus tumors or metastatic kidney, thyroid, or venous hemangiomas) or hypovascular (salivary gland tumors, neurogenic tumors, lymphomas, sarcomas). Detailed analysis of the contour of the neoplasm combined with clinical findings allowed further refinement of the differential diagnosis in each category. Most lesions had an intermediate signal intensity on T1-weighted images and a fairly high signal intensity on T2-weighted images. Hypervascular tumors had a number of "channel voids" caused by high-flow vessels on T1- and T2-weighted images, and on T2-weighted images there were areas of high signal intensity, presumably due to sites of slow flow within the image plane. The hypovascular lesions were quite homogeneous, and it was therefore more difficult to differentiate among the neoplasms in this group.

Adenoma↗
PubMed1987

"Ossifying" hemangiomas of the temporal bone: evaluation with CT.

Hemangiomas of the temporal bone that affect the facial nerve are more frequent than previously suspected. Six patients with slowly progressive or recurrent facial paralysis were evaluated with computed tomography. In each case, a lesion was demonstrated that enlarged the facial nerve canal and contained intratumoral spicules of bone. Typically the temporal bone was expanded by a lesion with an indistinct margin. Demonstration of the typical radiologic findings, especially the intratumoral bone spicules, makes hemangioma a much more likely diagnosis than schwannoma.

Adult↗
PubMed1987

Pseudotumor.

The term "pseuduotumor" is currently used to mean idiopathic orbital inflammation. CT can be of help in differentiating idiopathic orbital inflammation from thyroid ophthalmopathy and lymphoid tumors. The CT findings are reviewed along with important clinical and pathologic aspects.

Diagnosis, Differential↗
PubMed1985

Computed tomography appearance of melanoma of nasal cavity.

Melanoma of the nasal cavity is a mucosal lesion that is quite rare. It comprises less than 1% of all melanomas and constitutes 4% of primary malignant tumors of the nasal cavity. The computed tomography appearance of this entity is discussed and found to be nonspecific.

Aged↗
PubMed1985

CT of perineural tumor extension: pterygopalatine fossa.

Tumors of the oral cavity and paranasal sinuses can spread along nerves to areas apparently removed from the primary tumor. In tumors of the palate, sinuses, and face, this "perineural" spread usually involves the maxillary division of the trigeminal nerve. The pterygopalatine fossa is a pathway of the maxillary nerve and becomes a key landmark in the detection of neural metastasis by computed tomography (CT). Obliteration of the fat in the fossa suggests pathology. Case material illustrating neural extension is presented and the CT findings are described.

Adult↗
PubMed1984

Unusually large nasopalatine cyst: CT findings.

In a patient presenting with nasal obstruction the clinical suspicion of a nasal mass led to computed tomography that demonstrated findings thought to be characteristic of an unusually large nasopalatine cyst. The definitive diagnosis of nasopalatine cyst is more easily made on plain films. The entity is described, emphasizing once again the necessity of including dental and facial abnormalities in the differential diagnosis of lesions of the sinuses and nose.

Adult↗
PubMed1984

Optic nerve/sheath enlargement. A differential approach based on high-resolution CT morphology.

A wide variety of neoplastic and non-neoplastic processes can cause the intraorbital optic nerve and sheath to be enlarged on CT. The authors reviewed a large number of high-resolution CT scans and divided enlargement into three groups: tubular, fusiform, and excrescent. Further subdivision was possible by determining whether distinct optic nerve lucency was present or absent.

Cranial Nerve Neoplasms↗
PubMed1984

Radiologic approach to paragangliomas of the temporal bone.

High-resolution computed tomography (HRCT) has become the primary radiologic method for evaluation of paragangliomas of the temporal bone. The HRCT evaluation of the integrity of certain bony landmarks has a profound effect on selection of surgical approach. The most important landmarks are the bony walls separating the carotid artery and the jugular bulb from the middle ear. Arteriography is not necessary if the lesion is confined to the middle ear. However, it is indicated in tumors that have eroded the above landmarks or in those patients with related neurologic symptoms.

Angiography↗
PubMed1984

Extraocular muscle enlargement: a CT review.

Extraocular muscle enlargement can result from a wide variety of disease processes. Although observations of the pattern of muscle involvement, muscle shape and enhancement, superior ophthalmic vein and cavernous sinus enlargement, sinus and bony wall abnormalities, and proptosis can lead to a limited differential diagnosis in some cases, no radiographic finding in itself seems to be pathognomonic. Correlative clinical findings are necessary to make a secure diagnosis.

Acromegaly↗
PubMed1984

Computed tomography of orbital myositis.

The computed tomographic (CT) scans of 11 consecutive patients with orbital myositis were reviewed to better characterize the CT appearance of this condition. The findings in this series differed from those of previous reports in several ways. Multiple muscle involvement predominated. Bilateral involvement was more frequent than previously reported. Enlargement of the tendon as well as the muscle was a frequent finding, but a normal tendinous insertion did not preclude the diagnosis of orbital myositis. Although the CT appearance of orbital myositis is often helpful, the findings are not pathognomonic; correlation with history, clinical findings, and therapeutic response must be considered in making the diagnosis.

Adult↗
PubMed1984

CT of acoustic neuroma and other tumors of the ear.

Computed tomography is the primary radiologic tool for evaluation of ear tumors. This article divides the temporal bone into several geographic regions, and the evaluation of tumors in each of these areas is discussed.

Bone Diseases↗
PubMed1983

The facial nerve between the stylomastoid foramen and the parotid: computed tomographic imaging.

A small segment of the facial nerve between its exit from the stylomastoid foramen and its entrance into the parotid is surrounded by fat and, therefore, can be imaged well using modern computed tomography. A small dot can be seen surrounded by fat just beneath the stylomastoid foramen on computed tomographic scan. To verify that this indeed represented the facial nerve, tissue sections and an injection into the mastoid segment of the intratemporal facial nerve were performed. The anatomic correlation and clinical material demonstrating involvement of the facial nerve in this region are presented.

Aged↗
PubMed1982

Anomaly of the facial canal in a Mondini malformation with recurrent meningitis.

A patient with recurrent meningitis and congenital hearing loss was evaluated with tomography and metrizamide cisternography. Tomography showed an aberrant first portion of the facial nerve canal, while on cisternography, communication between the internal auditory canal and the dilated labyrinthine remnant was evident. The authors describe the radiographic findings and their significance and propose a mechanism for the formation of the anomalous facial nerve canal.

Child↗
PubMed1982

Malignant external otitis: CT evaluation.

Malignant external otitis is an aggressive infection caused by Pseudomonas aeruginosa that most often occurs in elderly diabetics. Malignant external otitis often spreads inferiorly from the external canal to involve the subtemporal area and progresses medically towards the petrous apex leading to multiple cranial nerve palsies. The computed tomographic (CT) findings in malignant external otitis include obliteration of the normal fat planes in the subtemporal area as well as patchy destruction of the bony cortex of the mastoid. The point of exit of the various cranial nerves can be identified on CT scans, and the extent of the inflammatory mass correlates well with the clinical findings. Four cases of malignant external otitis are presented. In each case CT provided a good demonstration of involvement of the soft tissues at the base of the skull.

Aged↗