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Biomedical subjects

H H Hawkins

Publications and source records attributed to H H Hawkins.

14 recordsLinked to original sources
PubMed2001

Breast disease in sarcoidosis.

BACKGROUND: Breast disease in sarcoidosis can be classified as sarcoidosis patients with breast granulomas, sarcoidosis patients with breast cancer, and breast cancer patients displaying sarcoidosis-like breast reactions. METHODS: We reviewed the medical records of 629 women with sarcoidosis followed in the Interstitial Lung Disease Clinic at the University of Cincinnati for findings associated with breast disease. In addition, three women with breast cancer who had granulomas in proximity to their tumors were also examined. RESULTS: Abnormal breast examinations or mammograms were reported in 15 patients with sarcoidosis (2% of women with sarcoidosis). Breast biopsy revealed granulomas consistent with sarcoidosis in six. One of them developed breast cancer five years later. Breast cancer was identified in twelve further patients, therefore a total of thirteen patients with breast cancer were identified. Ten were diagnosed with breast cancer plus sarcoidosis: sarcoidosis preceded breast cancer in three, followed breast cancer in five, the two diseases appeared simultaneously in two. Three additional women with breast cancer were also evaluated and classified as patients with sarcoid-like reaction. Review of the mammographic and physical findings could not distinguish between sarcoidosis in the breast and breast cancer. CONCLUSION: Sarcoidosis patients develop breast cancer at the expected frequency. The breast cancer diagnosis may precede or follow that of sarcoidosis. There is no relationship between stage of sarcoidosis or treatment and the development of cancer. Because physical examination and mammography findings are unable to distinguish between sarcoidosis and malignancy, biopsy of all suspicious lesions in sarcoidosis is recommended.

Adrenal Cortex Hormones↗
PubMed2000

Bilateral synchronous breast cancer: mode of detection and comparison of histologic features between the 2 breasts.

BACKGROUND: Bilateral synchronous breast cancer is uncommon (accounting for 1.0%-2.6% of all patients with breast cancer), and most physicians do not accumulate a large personal experience of patients with this disease. We reviewed our experience with patients with bilateral synchronous breast cancer, focusing on the mode of detection and histologic features in the 2 breasts. METHODS: The charts of patients who were treated at this institution for bilateral synchronous breast cancer during the 15-year period of 1984 through 1999 were reviewed. Information regarding age, mode of detection, histopathologic features, treatment, and overall survival were analyzed. RESULTS: During the study period, 51 patients (all women) were treated at our institution for bilateral synchronous breast cancer. This comprised 2.1% of all patients (n = 2382 patients) treated for breast cancer during the same period of time. The first cancer was detected by palpation in 81% and by mammography in 14%. The corresponding figures for the contralateral cancer were 24% and 54%, respectively. The histologic type of cancer was identical in the 2 breasts in 29 patients (57%) and was different between the 2 breasts in 22 patients (43%). The overall 10-year survival rate was 63%. CONCLUSIONS: Bilateral synchronous breast cancer is often detected by mammography and is frequently of the same histologic type as the index cancer. A better awareness of the risk for this disease may help detect bilateral breast cancer earlier.

Adult↗
PubMed1997

Clinical application of the Ottawa ankle rules for the use of radiography in acute ankle injuries: an independent site assessment.

OBJECTIVE: Previous studies show that the clinical criteria known as the Ottawa ankle rules (OAR), used for determining the need for radiographs of the ankle when a fracture is suspected, have a sensitivity of 100%, a specificity of 50%, and an overall reduction in radiographs of the ankle of 28%. The purpose of this study was to further assess the clinical usefulness of the OAR when implemented in an emergency department of a level 1 trauma center. SUBJECTS AND METHODS: Over a 1-year period, all patients who were between 18 and 55 years old and who presented to the emergency department with blunt ankle trauma were examined by emergency department clinicians who used the OAR to determine the need for ordering ankle radiographs. RESULTS: Of 926 patients with blunt ankle trauma, 759 met OAR criteria for ordering radiographs of the ankle. Of these patients, 152 were found to have a fracture. Another 167 of the patients were determined not to need ankle radiographs. Through either telephone contact or medical records review. 152 (91%) of these 167 patients were successfully followed up for the purpose of detecting any missed fractures. Two missed fractures were discovered, but only one required plaster immobilization. Based on these numbers, overall sensitivity using the OAR was 99% (confidence interval, 95-100%), and specificity was 22%. We found an overall 16% reduction in the number of ankle films ordered. CONCLUSION: When implemented at a level 1 trauma center, the OAR can adequately screen for ankle fractures.

Acute Disease↗
PubMed1996

Cisapride as a treatment for gastroparesis in traumatic brain injury.

Gastroparesis is a well-documented finding among patients with severe traumatic brain injuries. The treatment of choice has been metoclopramide, but it is less than ideal given its central dopaminergic blocking activity. Cisapride is a newer prokinetic agent without side effects on the central nervous system and might be a superior treatment. The case of a healthy 22-year-old man who suffered a severe traumatic brain injury and multiple trauma in a motor vehicle accident is reported. The patient required gastrostomy tube placement but developed recurrent aspiration pneumonia once feedings were initiated. Despite receiving metoclopramide, barium studies revealed gastroparesis, a significant decrease in gastric peristalsis, and reflux. A jejunostomy tube was placed to prevent further aspiration. The administration of cisapride was begun, and 2 days later the patient was changed back to G-tube feedings with no evidence of residual aspirates. Repeat barium study showed definite improvement in peristalsis. This case demonstrates the potential usefulness of cisapride in patients with traumatic brain injury. Although further research is necessary, efficacy without central dopamine blockage may make cisapride the treatment of choice for gastroparesis and reflux in traumatic brain injury.

Adult↗
PubMed1992

SK HEP-1: a human cell line of endothelial origin.

SK-HEP-1 is an immortal, human cell line derived from the ascitic fluid of a patient with adenocarcinoma of the liver. We have determined that these cells are of endothelial origin. Despite the location of the tumor from which SK HEP-1 was derived, the cell line does not have properties of hepatocytes. Northern blot analysis of total cellular RNA shows no messenger RNA for the hepatic-specific proteins albumin, alpha-fibrinogen, or gamma-fibrinogen. Endothelial characteristics are seen by transmission electron microscopy. These features include numerous pinocytotic vesicles, electron dense granules consistent with Weibel-Palade bodies, and abundant intermediate filaments, identified immunocytochemically as vimentin. Cultures grown on plastic dishes grow in bundles of polygonal to spindle-shaped cells. Proteins characteristic for endothelial cells are identified by immunocytochemistry. Addition of basement membrane material (Matrigel) or type I collagen to the cultures induces these cells to organize into a tubular network.

Adenocarcinoma↗
PubMed1987

The radiopacity of ingested medications.

We investigated prospectively the radiopacity of 312 pills found on a university hospital formulary by first radiographing them through 15 and 25 cm of water to duplicate the radiodensity of the human body. The pills that were radiodense through water were studied in a human cadaver model, and their densities were quantified by computed tomography (CT). Thirty-five of 312 pills were radiopaque in 15 cm or more of water, and 23 of these pills were radiopaque on a plain radiograph when placed in the stomach of a cadaver. Common mnemonics used to identify radiopaque pills were found to be incomplete and inadequate. Chloral hydrate, iron-containing preparations, calcium carbonate, iodinated compounds, acetazolamide, busulfan, and potassium preparations were consistently radiopaque. Antihistamines, phenothiazines, and tricyclic antidepressants demonstrated varying radiopacity. There was varying radiopacity among the same medications made by different manufacturers. The presence of an enteric coating did not assure that the pill would be radiopaque. Merely radiographing a pill that has been placed on a standard radiograph cassette will make pills that are actually radiolucent in the body appear radiopaque. This test cannot be used to predict radiopacity in vivo. Visibility when radiographed through 15 cm or more of water and a CT radiodensity of more than 1,300 Hounsfield units are predictors of the radiopacity of a pill in the stomach of a cadaver model on a standard KUB radiograph. Variables, such as the size of the patient, the arrangement of pills in the stomach, air contrasting a pill, and the specific composition of the enteric coating or the pillmatrix, affect the radiodensity of pills.(ABSTRACT TRUNCATED AT 250 WORDS)

Humans↗
PubMed1985

Computed tomography of abdominal and pelvic trauma.

Computed tomography (CT) is now considered an accepted modality in the initial and follow-up evaluations of traumatized patients. The purpose of this article is to reaffirm the important role of CT in the assessment of trauma. The subject matter covered includes trauma involving the abdomen and pelvis, including the spine and hips.

Abdominal Injuries↗
PubMed1985

Granulocytic sarcoma (chloroma): CT manifestations.

Nests of granulocytic tumor cells in patients who have myelogenous leukemia are termed chloromas. Eight cases of chloroma seen on CT were reviewed. Lymph nodes, subcutaneous tissues, peritoneum, pleural space, pelvis, and portal hepatis were involved. Two patients exhibited chloroma as the sole manifestation of their disease during bone marrow remission. The extracranial appearance of chloroma on CT is that of small, nonenhancing, nodular densities that resemble lymphoma. Cranial involvement is characteristically in the orbit. The central nervous system appearance is variable, however, and high attenuation masses may occur that mimic lymphoma, hematoma, and metastatic neuroblastoma. The recognition of these lesions is important, since radiation, not chemotherapy, is often the preferred treatment for localized chloroma.

Adolescent↗
PubMed1984

Idiopathic pulmonary ossification.

Idiopathic pulmonary ossification is an uncommon and asymptomatic disorder of unknown etiology in which trabeculated bone is found in the lung. It is usually mistaken for more serious entities radiographically, most commonly appearing as branching linear shadows of calcific density involving a limited area of the lung and exhibiting very slow progression; however, the shadows may be round or irregular and bulky. Sometimes the trabeculae are recognizable, and occasionally the lungs demonstrate widespread involvement. The authors describe 8 proven cases, including one in which a bone scan revealed uptake by heterotopic bone in the lung.

Diagnosis, Differential↗
PubMedDate not supplied

Content preauthoring: preparing medical imaging information for multimedia authoring and quizzing.

Recent advances in multimedia development software and related hardware have given professionals and nonprofessionals tremendous power and flexibility to create multimedia education and training programs. Nevertheless, content organization remains a key and often neglected component of program development. Content preauthoring puts findings, diagnoses, differential diagnoses, and other standard radiologic concepts into a format that fosters logical program layout, centralized remediation, record keeping, decreased data entry, a variety of user levels, easy addition of cases, and linkage to a question-generating program. The goal of content preauthoring is to organize radiologic material into a hierarchical or spreadsheet-based structure that provides a logical basis for software design. By separating content design from software authoring, both processes become more manageable. This approach is applicable to visually oriented topics that focus on identification. The highly structured, goal-oriented nature of the method makes it particularly suitable for newcomers to multimedia authoring.

Authorship↗
PubMedDate not supplied

Conceptual database modeling for understanding and developing information management applications.

In response to rising health care costs and changing expectations concerning the quality of health care, information management is becoming increasingly important in the practice of medicine; more specifically, it is beginning to effect significant changes in radiology practice and patient care. Radiologic applications of information management include reporting diagnostic information generated from film interpretation as well as tracking utilization patterns of different imaging modalities and the variability of clinical outcomes, documenting the type of information sought by and provided to clinicians, and evaluating departmental quality standards and performance goals. Conceptual database modeling enables radiologists to understand and participate in the development of information systems, thereby improving the likelihood of successful results. In object-role modeling, groups of relevant objects and roles are identified and used to create elementary facts that form the "building blocks" for information models. The resultant models can easily be communicated, reviewed, and revised, allowing decreased development time and optimizing inclusion of relevant features in the target relational database. Increasing the amount of clinical and management input in the development process may help information systems better meet user needs, become accepted and more often used, and ultimately succeed.

Databases, Factual↗