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KMID : 0377619720220030305
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Korean Jungang Medical Journal
1972 Volume.22 No. 3 p.305 ~ p.310
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Ectopic Pinealoma in the Supersellar Region
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Kim, Young Soo
Kim, Heung Chi/Lee, Chang Kyu/Lee, Hun Jae
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Abstract
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A case of ectopic pinealoma in the suprasellar region is described with its clinical manifestations, roentgenographic pictures, surgical management, pathological findings, and therapeutic irradiation. Surgical decompression of the optic nerve and post operative radiation Co 60, therapy made recovery of visual acuity in this case.
Ectopic pinealomas are considered to be rare2´4,7,s and one of the radiosensitive tumors found Ein the region of chiasm3. Histologically it resembles seminomas of the testis, dysgerminomas of the ovary, teratomas and a variety of mediastinal tumors and is commonly known as atypical teratoma or germinomal7´23´27. Similar tumors, when they occurs in locations other than the pineal gland, mostly in the chiasmal region, are referred to as "ectopic pinealomas"3´1 - L -1944 Russell defined two groups of pineal neoplasms, those derived from parenchymal cells, pinealocytomas and pinealoblastomas, and those which she termed atypical teratomas. Russell also pointed out that so called ectopic pinealomas, which occurred in the infundibular suprasellar region, were unrelated to pineal parenchymal cells and were histologically identical to the atypical teratomas of the pineal gland". Horrax and Wyatt reported 3 cases of this lesion in the chiasmal region1° and there have been numerous reports of so called ectopic pinealomas
since they were described by Russeli2,7,s,11,21,24,25,2s.
According to Japanese authors, pinealomas are for more common in Japan than that of Cushing´s series which accounted for about 2% of all intracranial tumorsl,s´12´31. And the incidence of ectopic pinealoma constitutes nearly 8.5% of 136 pinealomas in the pineal region.
According to literatures, ectopic pinealomas frequently locate in the region of the optic chiasm
around the third and lateral ventriclesl,2,10,11. Kitay and Altschule13 in their monograph on the pineal gland, over 50% of the total occurred in patients 20 years of age or younger. The incidence is three times as frequent in males as in females. Mixed tumors occur almost entirely in male patients, whereas cysts are found chiefly in woman.
Extension of the tumor to the pituitary fossa resulting in radiologically detectable enlargement of the sella tucica occurs only on rare occasions3´21. Symptomatology is variable depending upon involving areas. We are reporting a case of ectopic pinealoma in the suprasellar region. This
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