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Biomedical subjects

S Calderon

Publications and source records attributed to S Calderon.

At least 37 records · Page 2Linked to original sources
PubMed1994

Peripheral osteoma of the mandible: a study of 10 new cases and analysis of the literature.

Ten new cases of peripheral osteoma of the mandible are described. These lesions are uncommon and only 15 other cases have been reported in the English language literature over the past 30 years. There is evidence to suggest that the peripheral osteoma of the mandible is a traumatically induced reactive lesion and that muscle traction plays a role in its initiation. In view of this possibility, the term "parosteal osseous hyperplasia" may be more appropriate for those lesions in which a positive history of trauma preceded the onset.

Adolescent↗
PubMed1994

Radiological findings in jaws and skull of neurofibromatosis type 1 patients.

Maxillary and mandibular lesions in neurofibromatosis Type 1 (NF1) in patients are described. Radiographic manifestations include radiolucent lesions with well-defined, poorly-defined or irregular diffuse borders. Mandibular lesions were not associated with the inferior alveolar nerve as it coursed within the mandible. In three patients the lesions extended considerably into the cranial bones. The necessity for routine radiographic and CT evaluation of NF1 patients is emphasized.

Adolescent↗
PubMed1993

PCP: a review of synthetic methods for forensic clandestine investigation.

A review of the synthetic routes to phencyclidine (PCP, 1-(1-phenylcyclohexyl)piperidine) available in the open literature is presented. The emphasis herein is directed toward the forensic investigation of clandestine PCP laboratories. Six published synthetic routes to PCP/analogs are discussed. Each method is rated for overall yield, degree of difficulty and potential hazard, in order to assist the forensic chemist in evaluation of a particular clandestine operation. One clandestine recipe is illustrated and discussed.

Forensic Medicine↗
PubMed1993

Epidermal nevus syndrome with maxillary involvement.

A female patient with epidermal nevus syndrome is reported. There were linear epidermal nevi, hemihyperplasia of the limbs and tongue, macrocephaly, several ophthalmic malformations, and multiple radiolucent lesions in the limbs and sacroiliac region. At age 14 years, she developed a giant cell granuloma of the maxilla.

Abnormalities, Multiple↗
PubMed1993

Intraoral acinic cell carcinoma.

Three cases of acinic cell carcinomas in minor salivary glands of the oral cavity are reported. The tumors were slow-growing and asymptomatic and were treated by wide local excision. A long-term follow-up showed no metastasis. One patient had local recurrence. Generally, this malignant tumor has the potential to recur and metastasize many years after initial diagnosis and treatment. Total excision has been the established treatment of choice. The contribution of radiotherapy and chemotherapy remains unclear.

Aged↗
PubMed1992

Techniques for ensuring the lateral position of the proximal segment following intraoral vertical ramus osteotomy.

Continual refinements of the surgical technique and instrumentation for the intraoral vertical ramus osteotomy have made it a preferred procedure for mandibular setback, especially in asymmetrical cases. However, there may be intraoperative difficulty in lateral positioning of the proximal segment, which is frequently trapped medially. Three techniques for lateral relocation of the medially displaced proximal segment are described. Techniques designed to prevent this medial displacement also are presented.

Humans↗
PubMed1990

Head, neck, and maxillofacial childhood Burkitt's lymphoma: a retrospective analysis of 31 patients.

Thirty-one children with Burkitt's lymphoma of the head, neck, and maxillofacial region diagnosed between 1976 and 1988 were reviewed. The age range was 2 to 17 years (median, 7.2 years), and 77.4% were males. The most common presenting symptoms were detectable masses, floating and/or painful teeth, enlarged cervical lymph nodes, sore throat, and neurologic signs. The predominant primary tumor sites were the jaws and tonsils. All patients were staged by a clinical staging system, 17 of them having stage I-II, and 14 stage III-IV. Levels of lactate dehydrogenase and ferritin were the only significant laboratory parameters correlating with initial staging and disease-free survival. Radiologic features in the jaws were poorly circumscribed destructive lytic lesions with migration and crypt destruction of unerupted teeth buds. Complete disappearance of these findings was noted after successful chemotherapy and clinical regression of the tumor. Eighteen (58.1%) patients attained complete remission with a follow-up of 5 to 100 months. Stage was the most significant variable affecting outcome, with 90.2% disease-free survival of stage I patients, 72.4% of stage II, and 18.2% of stage III-IV. Based on these results, it is concluded that localized (stage I and II) Burkitt's lymphoma is responsive to chemotherapy and thus has a favorable prognosis.

Adolescent↗
PubMed1990

Sarcoidosis with oral involvement.

A case of sarcoidosis with bilateral hilar lymphadenopathy and multiple submucosal papular oral mucosa lesions is presented. The clinical signs and symptoms described in this case are not uncommon, and their distinguishing features may expedite accurate diagnosis. Early incisional biopsy of the oral mucosa appears useful for histopathologic proof of the diagnosis.

Acute Disease↗
PubMed1989

Simultaneous occurrence of a congenital lateral upper lip sinus and congenital gingival cyst: a case report and discussion of pathogenesis.

The simultaneous occurrence of a congenital lateral sinus of the upper lip and of a congenital gingival cyst in a newborn boy is reported. The sinus extended to a depth of 10 mm and was lined by a parakeratinized squamous epithelium. The gingival cyst appeared as a 1 cm palatal enlargement lingual to the maxillary alveolar ridge and demonstrated a thin epithelial lining with localized plaquelike thickenings and occasional clear cells with vacuolated cytoplasm. There was no familial history of congenital deformities, and no additional abnormalities were noted. These two epithelium-lined structures show a clear topographic and morphologic relationship, and they may share a common embryologic origin. It is suggested that they derive from epithelium remaining subsequent to the union of the maxillary process and medial nasal process mesoderms.

Child↗
PubMed1989

A technique for the treatment of mandibular body fractures in young children.

Mandibular body fractures in young children are uncommon, yet their treatment and management often present several difficulties. The presence of developing dental follicles may lead to irregular fracture lines and precludes the use of intraosseus wiring. In addition, treatment of fractures in children of this age requires a technique that limits the number of separate procedures that they are subjected to. The technique outlined below for the treatment of mandibular body fractures in young children, uses a plastic impression tray as a splint and provides a simple means for their reduction and fixation.

Child↗
PubMed1989

Detection of human papillomavirus (HPV) DNA in focal epithelial hyperplasia.

Five focal epithelial hyperplasia (FEH) specimens from four patients were examined by Southern blot hybridization analysis to determine the specific human papillomavirus (HPV) types present. The histomorphologic features of these specimens were also evaluated and a broad variety of changes including koilocytes, mitosoid cells, ballooning cells and cells showing individual cell keratinization were noted. FEH lesions from the three patients sharing a familial relationship demonstrated HPV DNA sequences that were either the prototype HPV-13 or a very closely related HPV-13 subtype. These patients also showed similar clinical features. Lesional tissue from the other patient was found to harbor HPV DNA sequences similar to HPV-32. In view of these findings it is suggested that these specific HPV types are associated with the characteristic FEH histomorphology described.

Adolescent↗