Document Detail


Assessment of bilateral inferior petrosal sinus sampling (BIPSS) in the diagnosis of Cushing's disease.
MedLine Citation:
PMID:  17276926     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: The differential diagnosis of adrenocorticotropin (ACTH)-dependent Cushing's syndrome (CS) remains a challenging issue for clinical endocrinologists. In this respect, bilateral inferior petrosal sinus sampling (BIPSS) appears to be the most sensitive and specific test. Here, we report our 15-year experience of analyzing the performance of BIPSS, both in the correct diagnosis and in the precise lateralization of tumors in patients with Cushing's disease (CD). METHODS: Between 1992 and 2006, 18 patients with CD (16 females, 2 males; age range, 14-56 years) were admitted to Taipei Veterans General Hospital and subjected to BIPSS plus ovine corticotropin-releasing hormone (oCRH) stimulation. Four of them had previously undergone transsphenoidal hypophysectomy (TSH) and had a recurrence thereafter. BIPSS was performed by inserting a catheter in the right and left inferior petrosal sinus for ACTH assay via a femoral vein puncture. An inferior petrosal sinus/peripheral ACTH ratio (C/P ratio) > or = 2 at baseline > or = 3 after oCRH injection indicated a pituitary origin of ACTH secretion, and an interpetrosal ACTH gradient (IPS ratio) > or = 1.4 at baseline or after oCRH indicated evidence of lateralization. RESULTS: Positive BIPSS results were found in 16 patients at baseline and in 17 patients after oCRH injection. In 17 out of 18 patients, TSH was subsequently carried out and a pituitary source was confirmed on histopathologic examination. The only 1 false-negative test result was noted in a patient who had undergone previous TSH. Thus, the sensitivities of BIPSS for the diagnosis of CD before and after oCRH stimulation were 89% and 94%, respectively. Moreover, using an IPS ratio > or = 1.4 as a criterion, BIPSS correctly lateralized the tumor in 9 of 17 and 10 of 17 patients at baseline and after oCRH stimulation, respectively, including in 2 patients who had a centrally located tumor and who had an IPS ratio < 1.4. Thus, the sensitivities of lateralization of BIPSS were 53% and 59%, respectively. None of the 4 patients who had previous TSH were precisely localized by BIPSS. If these 4 patients were excluded, the sensitivities of BIPSS for localizing in the patients who had not undergone previous operation increased to 70% (9/13) at baseline and 77% (10/13) after oCRH stimulation, respectively. CONCLUSION: BIPSS combined with oCRH stimulation is a safe and reliable examination both in the differential diagnosis of CD and in the correct lateralization of pituitary microadenoma in patients without previous pituitary surgery. Nevertheless, this procedure may provide misleading results in patients who have received previous pituitary surgery.
Authors:
Liang-Yu Lin; Michael Mu-Huo Teng; Chun-I Huang; Wen-Ya Ma; Liang-Yu Lin; Michael Mu-Huo Teng; Chun-I Huang; Wen-Ya Ma; Kang-Ling Wang; Hong-Da Lin; Justin G S Won
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the Chinese Medical Association : JCMA     Volume:  70     ISSN:  1726-4901     ISO Abbreviation:  J Chin Med Assoc     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-02-05     Completed Date:  2007-03-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101174817     Medline TA:  J Chin Med Assoc     Country:  China (Republic : 1949- )    
Other Details:
Languages:  eng     Pagination:  4-10     Citation Subset:  IM    
Affiliation:
Division of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adrenocorticotropic Hormone / blood*
Adult
Corticotropin-Releasing Hormone / pharmacology
Cushing Syndrome / blood,  diagnosis*
Female
Humans
Magnetic Resonance Imaging
Male
Middle Aged
Petrosal Sinus Sampling / adverse effects,  methods*
Chemical
Reg. No./Substance:
9002-60-2/Adrenocorticotropic Hormone; 9015-71-8/Corticotropin-Releasing Hormone
Comments/Corrections
Comment In:
J Chin Med Assoc. 2007 Jan;70(1):1-2   [PMID:  17276924 ]

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