| pineal gland calcification | <radiology> Visible on plain skull film (33-76% in adults), seen more frequently on CT, rare in kids less than 6 y.o. (presence suggests neoplasm), usually in the form of a cluster of amorphous, irregular densities, may be solitary, the size of calcification: usually 3-5 mm, if greater than 1 cm, suspect pinealoma, AV malformation, etc. See: physiological intracranial calcifications (12 Dec 1998) |
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| pedunculus of pineal body | See: habenula. (05 Mar 2000) |
| pineal | A gland-like structure in the brain which appears to be the major site of melatonin biosynthesis. The exact role of the pineal remain obscure. (27 Sep 1997) |
| pineal body | A small conical midline body attached to the posterior part of the third ventricle and lying between the superior colliculi, below the splenium of the corpus callosum. (12 Dec 1998) |
| pineal cells | Cell's of the corpus pineale or pinealocyte. (05 Mar 2000) |
| pineal cyst | A cyst of the pineal gland; rarely of clinical importance. (05 Mar 2000) |
| pineal eye | A non-image-forming, photoreceptive eye in or near the median line in certain crustacea and lower vertebrates; homologue of pineal gland in higher forms. Synonym: epiphysial eye, parietal eye. (05 Mar 2000) |
| pineal gland | A small, flat gland found within the brain which produces the hormones melatonin and serotonin. (09 Oct 1997) |
| pineal habenula | The peduncle or stalk of the pineal gland. See: habenula. (05 Mar 2000) |
| pineal recess | A diverticulum from the posterior part of the third ventricle extending back between the posterior commissure and the habenular commissure. Synonym: recessus pinealis. (05 Mar 2000) |
| pineal region tumours | Type of brain tumours. (12 Dec 1998) |
| pineal tumours | <radiology> SIGNS: aqueductal obstruction most likely to be hydrocephalus, paralysis of upward gaze (due to pressure on quarigeminal plate), precocious puberty, symptoms of hypothalamic, thalamic, cerebellar or pyramidal lesion TYPES: germ-cell (teratoid) tumours, teratoma, germinoma / atypical teratoma, endodermal sinus (yolk sac) tumour, choriocarcinoma, pineal-cell tumours, pineocytoma, pineo---, others, glioma, ganglioneuroma, ganglioglioma (12 Dec 1998) |
| adrenal calcification | <radiology> Haemorrhage, cyst, Addison's disease (e.g., TB, histo), neoplasm, pheochromocytoma, adrenal cortical adenoma/carcinoma, adrenal choristoma (myelolipoma), metastatic melanoma, Wolman disease (12 Dec 1998) |
| basal ganglia calcification | <radiology> Idiopathic: normal variant (50%), abnormal calcium metabolism, hyperparathyroidism, hypo-, pseudohypo-, and pseudo-pseudohypoparathyroidism, ToRCHS infection (especially CMV, toxo), tuberous sclerosis, Cockayne syndrome, Fahr syndrome (ferrocalcinosis), lipoid proteinosis (hyalinosis cutis) (12 Dec 1998) |
| bladder calcification | <radiology> Schistosomiasis (bilharziasis), major cause worldwide, 50% have calcification, can cause squamous cell carcinoma, TB and other infections, radiation cystitis, calculi, bladder neoplasms, transitional cell carcinoma, squamous cell carcinoma, leiomyosarcoma, haemangioma, neuroblastoma, osteosarcoma (12 Dec 1998) |