Endocrinology and Metabolism

Original Articles

The Localization of Microadenoma with Sella Imaging Study and Inferior Petrosal Sinus Sampling in Cushing's Disease.: Jae Seok Jeon, Sang Jeon Choi, Chan Soo Shin, Kyoung Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hee Won Jung, Dae Hee Han, Moon Hee Han, Kee Hyun Chang; J Korean Endocr Soc. 1996;11(4):492-499. Published online November 7, 2019

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Abstract PDF: Background
Inferior petrosal sinus sampling(IPSS) is known to be useful for the differential diagnosis of ACTH-dependent Cushings syndrome and for the preoperative lateralization of pituitary microadenoma. We tried to analyze the relative value of IPSS in localization of microadenoma as compared with sella imaging study including computerized tomogram(CT) or magnet resonance imaging(MRI) in Cushings disease. Methods: We reviewed the clinical records of 21 patients with Cushings disease who underwent IPSS and the radiologic study such as sella CT or sella MRI preoperatively followed by transsphenoidal microsurgery. By pathologic examination including immunohistochemistry and postoperative clinical and biochemical evaluation we confirmed the diagnosis of Cushings disease due to pituitary microadenoma in all 21 cases. Results: Sella CT or sella MRI detected microadenoma in 57.1% of cases( =12/21), while recently available dynamic MRI did so in 7 out of S cases. With IPSS the diagnosis of Cushings disease was possible in 90.5% of cases(= 19/21), but accurate lateralization of microadenoma was achieved in only 63.2% of cases( =12/19). IPSS precisely localized the pituitary microadenoma in 6 out of 9 cases whose lesion were not detected by the radiologic study. Of 7 cases in which IPSS failed to localize microadenoma, the radiologic study detected the lesion in 6 cases. Of 5 cases in which IPSS and the radiologic study showed a discrepancy in location of microadenoma, the radiologic study correctly localizaed the lesion in 4 cases and IPSS did so in one case. Conclusion: IPSS is not more reliable than sella imaging study for preoperative localization of microadenoma in Cushings disease. However it might have a complementary role, especially when sella imaging study failed to visualize the lesion.

A Clinical study on the diagnesis and Treatment of Cushing's Disease - The significance of bilateral inferior petrosal sinus sampling -.: Seong Yeon Kim, Kyung Soo Park, Bo Youn Cho, Hong Kyu Lee, Jae Seok Jeon, Hyeong Kyu Park, Chang Soon Koh, Hun Ki Min, Heu Won Jeong, Dae Hee Han, Moon Hee Han, Kee Hyun Jang; J Korean Endocr Soc. 1994;9(2):115-120. Published online November 6, 2019

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Abstract PDF: Bilateral inferior petrosal sinus sampling(IPSS) is known to be useful for the differential diagnosis of ACTH-dependent Cushing's syndrome and for the preoperative localization of pituitary microadenomas.To evaluate the usefulness of IPSS, we performed the procedure in the 17 cases of ACTH-dependent Cushing's syndrome including 2 cases of macroadenomas, 6 of them with CRH stimulation test. A inferior petrosal sinus-to-peripheral ACTH ratio of 2:1 or greater(3:1 after CRH stimulation) indicates a pituitary source of ACTH hypersecretion, and a ratio of the ACTH level in one inferior petrosal sinus to the ACTH level in the other of 1:4 or greater lateralizes the microadenomas to that half of the pituitary gland.With these criteria, we diagnosed Cushing's disease in 15 of 17 cases of ACTH-dependent Cushing's syndrome, and localized the lesion in 8 of 13 cases of microadenoma.In conclusion, IPSS with CRH stimulation has high diagnostic accuracy in the differential diagnosis of ACTH-dependent Cushing's syndrome, but still has the limitations on the localization of microadenoma.

Review Article

Adrenal gland
Clinical Guidelines for the Diagnosis and Treatment of Cushing's Disease in Korea: Kyu Yeon Hur, Jung Hee Kim, Byung Joon Kim, Min-Seon Kim, Eun Jig Lee, Sung-Woon Kim; Endocrinol Metab. 2015;30(1):7-18. Published online March 27, 2015; DOI: https://doi.org/10.3803/EnM.2015.30.1.7

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Abstract PDF PubReader

Cushing's disease (CD) is a rare disorder characterized by the overproduction of adrenocorticotropic hormone due to a pituitary adenoma that ultimately stimulates excessive cortisol secretion from the adrenal glands. Prior to the detection of pituitary adenomas, various clinical signs of CD such as central obesity, moon face, hirsutism, and facial plethora are usually already present. Uncontrolled hypercortisolism is associated with metabolic, cardiovascular, and psychological disorders that result in increased mortality. Hence, the early detection and treatment of CD are not only important but mandatory. Because its clinical manifestations vary from patient to patient and are common in other obesity-related conditions, the precise diagnosis of CD can be problematic. Thus, the present set of guidelines was compiled by Korean experts in this field to assist clinicians with the screening, diagnoses, and treatment of patients with CD using currently available tests and treatment modalities.

Citations

Citations to this article as recorded by

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Case Report

A Case of Raymond-Cestan Syndrome Caused by Inferior Petrosal Sinus Sampling.: Dong Hyeok Cho; J Korean Endocr Soc. 2003;18(1):73-78. Published online February 1, 2003

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Abstract PDF: Inferior petrosal sinus sampling (IPSS) plays an important role in the assessment of patients with ACTH-dependent Cushing's syndrome. IPSS has been described as an innocuous, essentially risk-free procedure. Neurological complications associated with IPSS are rare. Previously reported neurological complications include brain stem infraction, pontine hemorrhage and subarachnoid hemorrhage. A 26-year-old woman was admitted to the hospital because of a moon face and a buffalo hump. A MRI showed a suspicious, but uncertain, area on the left side of the sella turcica. IPSS was performed as an appropriate means of providing more information about the side of the ACTH source. Immediately after the procedure, the woman experienced double vision, caused by a complete sixth nerve palsy of the left eye, together with a contralateral hemiparesis. From a clinical point of view, abducens nerve palsy and contralateral hemiparesis corresponded to Raymond-Cestan syndrome. I report a case of Raymond-Cestan syndrome, following petrosal sinus sampling in a female patient with ACTH-dependent Cushing's syndrome. To the best of our knowledge, this complication associated with petrosal sinus sampling has only been described in one previous case report. Although IPSS may provide essential information in the investigation of Cushing's syndrome, the possibility of very occasional but devastating complications should be remembered.

Original Article

Diagnosis of Cushing's Disease by Inferior Petrosal Sinus Sampling (IPSS): Evidence of False Negative Results.: Seon Hwa Lee, Hyeon Jeong Jeon, Sun Hee Park, Sun Wook Kim, Do Joon Park, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 1999;14(3):483-492. Published online January 1, 2001

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Abstract PDF: BACKGROUND
While inferior petrosal sinus sampling (IPSS) correctly diagnoses pituitary dependent Cushings syndrome if a significant ratio of plasma ACTH between the IPS and the peripheral blood is demonstrated, little has been said about the significance of a negative ratio in Cushings disease (e.g. false negative result). We evaluated the results of IPSS with Cushings disease, and compared them with imaging findings through transsphenoidal surgery. METHODS: 29 patients with Cushings disease underwent transsphenoidal examination of the pituitary gland from 1989 to 1998 at Seoul National University Hospital were evaluated. We compared the results of IPSS and imaging findings with sellar CT or dynamic MRI. The ratio of the ACTH concentrations at the IPS and in the peripheral blood (IPS:P ratio) and the ratio of the ACTH concentrations between the IPSs (interpetrosal ratio) were calculated before and after CRH infusion. RESULTS: With IPSS the diagnosis of Cushings disease was possible in 90% (26/29), and 3 cases in whom IPSS did not show significant IPS:P ACTH ratio were confirmed to be Cushings disease through hemihypophysectomy of lesion suspected by sellar dynamic MRI and achieved remission after operation (e.g. false negative result of diagnosis for Cushings disease by IPSS). However, accurate localization of microadenoma was achieved in only 59% (17/29). Imaging study detected microadenoma in 76% (22/29) and correctly localized in 66% (19/29). Both IPSS and imaging study precisely localized the pituitary microadenoma in 10 (34.5%) cases of 29 cases and a discrepancy between two studies existed in 7 (24.1%) cases in which the imaging study correctly localized microadenoma in 6 cases and IPSS in 1 case. CONCLUSION: Only when a significant IPS:P ACTH ratio is present can Cushings disease be established by IPSS. The absence of a significant IPS:P ACTH ratio does not necessarily imply ectopic secretion of ACfH, nor does it exclude Cushings disease. The results of lateralization by IPSS do not remove the need for transsphenoidal examination of the sella turcica because false negative result can be. IPSS and radiologic study should be complementary used in diagnosis of Cushings disease and localization of microadenoma, as IPSS can be used when sellar imaging study failed to visualize the lesion and hemihypophysectomy of suspected lesion by imaging study can be considered when IPSS did not show significant ratio of ACTH.

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