| IRIS | integrated risk information system; interleukin regulation of immune system; International Research ... |
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| MCS | malignant carcinoid syndrome; managed care system; massage of the carotid sinus; mesocaval shunt; me... |
| MHS | major histocompatibility system; malignant hyperthermia in swine; malignant hyperthermia syndrome; m... |
| MIMS | medical information management system; medical inventory management system |
| PDS | pain-dysfunction syndrome; paroxysmal depolarizing shift; patient data system; Patient-Doctor Societ... |
| infratentorial neoplasms | Intracranial tumours originating in the infratentorial region and occurring in both children and adults. Histological diagnoses include teratoma, medulloblastoma, glioblastoma, astrocytoma, ependymoma, craniopharyngioma, choroid plexus papilloma, and undetermined types. Therapeutic treatments include tumour resection, ventriculoperitoneal shunt, subdural peritoneal shunt, ventricular drainage, radiotherapy, and chemotherapy. (12 Dec 1998) |
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| iris neoplasms | Tumours of the iris characterised by increased pigmentation of melanocytes. Iris nevi are composed of proliferated melanocytes and are associated with neurofibromatosis and malignant melanoma of the choroid and ciliary body. Malignant melanoma of the iris often originates from preexisting nevi. (12 Dec 1998) |
| orbital neoplasms | Neoplasms of the bony orbit and contents except the eyeball. (12 Dec 1998) |
| otorhinolaryngologic neoplasms | The general concept of orl neoplasms or those for which no specific heading exists. (12 Dec 1998) |
| ear neoplasms | Neoplasms of the internal, external, or middle ear. (12 Dec 1998) |
| endocrine gland neoplasms | Tumour or cancer of the endocrine glands in general or unspecified. (12 Dec 1998) |
| endometrial neoplasms | The most common invasive gynecologic malignancy in the united states, typically in postmenopausal women. The neoplasm originates on the endometrial mucosa and may be focal or diffuse. It may progress to invasion of the myometrium. The commonest histologic type is adenocarcinoma but adenoacanthoma, adenosquamous carcinoma, epidermoid carcinoma, and other histological types of cancer are possible. (12 Dec 1998) |
| epidural neoplasms | Neoplasms located in the epidural space, at or above the dura mater of the spinal cord. (12 Dec 1998) |
| trophoblastic neoplasms | Trophoblastic growth, which may be gestational or nongestational in origin. Trophoblastic neoplasia resulting from pregnancy is often described as gestational trophoblastic disease to distinguish it from germ cell tumours which frequently show trophoblastic elements, and from the trophoblastic differentiation which sometimes occurs in a wide variety of epithelial cancers. Gestational trophoblastic growth has several forms, including hydatidiform mole and choriocarcinoma. (12 Dec 1998) |
| jaw neoplasms | Cancers or tumours of the maxilla or mandible unspecified. For neoplasms of the maxilla, maxillary neoplasms is available and of the mandible, mandibular neoplasms is available. (12 Dec 1998) |
| kidney neoplasms | Neoplasms or tumours of the kidney. Renal cell carcinoma is the most common neoplastic lesion of the kidney, accounting for approximately 85% of all kidney neoplasms. The vast majority of these tumours are adenocarcinoma. (12 Dec 1998) |
| ureteral neoplasms | Neoplasms or tumours of the ureter. Haematuria, which occurs in 75% of patients with ureteral carcinoma, is the most common presenting symptom. The most common site for the occurrence of a ureteral tumour is in the lower third of the ureter, with a lesser incidence higher up. (12 Dec 1998) |
| urethral neoplasms | Neoplasms or tumours of the urethra. This condition is relatively uncommon and is the only cancer of the urinary system that has a higher incidence rate in females than males. Squamous cell carcinoma is the most frequent histologic type. (12 Dec 1998) |
| urogenital neoplasms | Neoplasms of the urogenital tract. (12 Dec 1998) |
| urologic neoplasms | Neoplasms of the urinary tract in both male and female. It does not include the male genitalia for which urogenital neoplasms is used for general discussions of neoplasms of both the urinary tract and the genitalia. (12 Dec 1998) |