Biomedical subjects

W Lawson

Publications and source records attributed to W Lawson.

At least 163 records · Page 9Linked to original sources

PubMed1978

Identification of the recurrent laryngeal nerve.

Explore the source record for details and available documents.

Humans↗

PubMed1977

Malignant fibrous histiocytoma of the head and neck.

Review of the literature reveals of 29 cases of fibrous histiocytoma of the deep structures of the head and neck. Three additional cases are reported: a multicentric case involving the submandibular gland with metastases to the lungs; and intraosseous tumor of the mandible locally invasive; and a submental tumor which rapidly recurred after simple excision. A metastatic potential of 22% is established. The historm, nomenclature, histopathology and clinical features are reviewed. The value of electron microscopy and tissue culture in arriving at the current diagnosis are stressed. Wide excision is the treatment of choice.

Adolescent↗

PubMed1976

Studies on melanocytes. V. The presence of melanocytes in the human dental primordium: an explanation for pigmented lesions of the jaws.

Melanocytes were observed within the dental lamina or tooth bud in three of eleven Caucasian and in all six Negro fetuses, 12 to 18 weeks of gestation, studied. The presence of these cells in the dental primordium points to a contribution by the neural crest to the formation of the tooth in mammals. The occurrence of melanocytes in the dental anlage may also explain the histogenesis of such pigmented lesions as the melanotic "progonoma," calcigying odontogenic cyst, and the pigmented odontogenic tumor of Richardson.

Black People↗

PubMed1976

Cervical hibernoma.

The hibernoma is a rare neoplasm derived from vestigal remnants of brown fat left from early embryologic development. Review of the world literature reveals only 40 cases to which we are adding a report of a tumor arising in the posterior cervical triangle of a 20-year-old man. The distribution, histology and cytochemistry of brown fat and the hibernoma are discussed, and evidence supporting its histogensis is presented.

Adipose Tissue, Brown↗

PubMed1976

Paragangliomatosis associated with multiple endocrine adenomas.

A 19-year-old woman had multiple functioning extra-adrenal paragangliomas, a pituitary adenoma associated with acromegaly, parathyroid hyperplasia, and pigmentary abnormalities. This case differs from previously described instances of multiple endocrine adenomatosis (MEA) and has features that bridge the classic MEA type 1 and 2 syndromes and possibly Von Recklinghausen disease. The coexistence of pheochromocytoma with acromegaly is extremely rare, and the association with extra-adrenal paragangiliomas appears to be unique. Thyroid parafollicular cell proliferation could not be proved by immunohistochemical or electron microscopical studies. The large number and extensive distribution of paragangliomas, ranging from neck to pelvis, is another unique feature of this case. The concept of neurocrestopathy or of an endocrine polypeptide (APUD) cell system may offer an explanation for the interrelation of these diverse growths.

Adrenal Gland Neoplasms↗

PubMed1976

Sebaceous glands in the esophagus. First case observed grossly.

Minute, pale tan macules of the esophageal mucosa observed at autopsy proved, on microscopical study, to be sebaceous glands unaccompanied by hair follicles. Metaplasia of pluripotent cells is postulated as their origin in this purely endodermal tissue, rather than derivation from islands of misplaced epidermis.

Aged↗

PubMed1975

Chin reduction in profileplasty.

An intraoral method of reduction mentoplasty by subapical horizontal osteotomy of the mandibular symphysis is used in the profileplasty of patients with a protuberant chin who have a normal or functionally satisfactory occlusion. Dental and cephalometric evaluation are necessary to determine if resection of the mandible or orthodontic surgery is necessary for correction of the facial deformity. Because of the tendency toward postoperative osteoneogenesis and fibrosis, overcompensation in the amount of bone removed is important in gaining the maximum aesthetic improvement.

Adult↗

PubMed1975