| pineal habenula | The peduncle or stalk of the pineal gland. See: habenula. (05 Mar 2000) |
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| habenula | A small protuberance at the dorsal, posterior corner of the wall of the third ventricle, adjacent to the dorsal thalamus and pineal body. It contains the habenular nuclei and is a major part of the epithalamus. (12 Dec 1998) |
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| habenula of caecum | Extension of the mesocolic tenia, dorsal or ventral to the terminal ileum. (05 Mar 2000) |
| habenula urethralis | One of two fine, whitish lines running from the meatus urethrae to the clitoris in girls and young women; the vestiges of the anterior part of the corpus spongiosum. (05 Mar 2000) |
| Haller's habenula | Rarely used term for the cordlike remains of the vaginal process of the peritoneum. Synonym: Scarpa's habenula. (05 Mar 2000) |
| Scarpa's habenula | Rarely used term for the cordlike remains of the vaginal process of the peritoneum. Synonym: Scarpa's habenula. (05 Mar 2000) |
| trigone of habenula | A small triangular area on the dorsomedial surface of the thalamus at the caudal end of the medullary stria, corresponding to the underlying habenula. Synonym: trigonum habenulae, trigone of habenula. (05 Mar 2000) |
| 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 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) |
| 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) |