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Giampietro RR, Cabral MVG, Pereira EG, Machado MC, Vilar L, Nunes-Nogueira VDS. Accuracy of the 10 μg desmopressin test for differential diagnosis of Cushing syndrome: a systematic review and meta-analysis. Front Endocrinol (Lausanne) 2024; 15:1332120. [PMID: 38352712 PMCID: PMC10861662 DOI: 10.3389/fendo.2024.1332120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 01/09/2024] [Indexed: 02/16/2024] Open
Abstract
We evaluated the accuracy of the 10 μg desmopressin test in differentiating Cushing disease (CD) from non-neoplastic hypercortisolism (NNH) and ectopic ACTH syndrome (EAS). A systematic review of studies on diagnostic test accuracy in patients with CD, NNH, or EAS subjected to the desmopressin test obtained from LILACS, PubMed, EMBASE, and CENTRAL databases was performed. Two reviewers independently selected the studies, assessed the risk of bias, and extracted the data. Hierarchical and bivariate models on Stata software were used for meta-analytical summaries. The certainty of evidence was measured using the GRADE (Grading of Recommendations Assessment, Development, and Evaluation Working Group) approach. In total, 14 studies were included: 3 studies on differentiated CD versus NNH and 11 studies on differentiated CD versus EAS. Considering ΔACTH in 8 studies involving 429 patients, the pooled sensitivity for distinguishing CD from EAS was 0.85 (95% confidence interval [CI]: 0.80-0.89, I2 = 17.6%) and specificity was 0.64 (95% CI: 0.49-0.76, I2 = 9.46%). Regarding Δcortisol in 6 studies involving 233 participants, the sensitivity for distinguishing CD from EAS was 0.81 (95% CI: 0.74-0.87, I2 = 7.98%) and specificity was 0.80 (95% CI: 0.61-0.91, I2 = 12.89%). The sensitivity and specificity of the combination of ΔACTH > 35% and Δcortisol > 20% in 5 studies involving 511 participants were 0.88 (95% CI: 0.79-0.93, I2 = 35%) and 0.74 (95% CI: 0.55-0.87, I2 = 27%), respectively. The pooled sensitivity for distinguishing CD from NNH in 3 studies involving 170 participants was 0.88 (95% CI: 0.79-0.93) and the specificity was 0.94 (95% CI: 0.86-0.97). Based on the desmopressin test for differentiating CD from EAS, considering ΔACTH, Δcortisol, or both percent increments, 15%, 19%, or 20% of patients with CD, respectively, would be incorrectly classified as having EAS. For CD versus NNH, 11% of patients with CD would be falsely diagnosed as having NNH, whereas 7% of patients with NNH would be falsely diagnosed as having CD. However, in all hierarchical plots, the prediction intervals were considerably wider than the confidence intervals. This indicates low confidence in the estimated accuracy, and the true accuracy is likely to be different. Systematic review registration https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=85634, identifier CRD42018085634; https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=68317, identifier CRD42017068317.
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Affiliation(s)
- Rodrigo Rosa Giampietro
- Department of Internal Medicine, Sao Paulo State University/UNESP, Medical School, Sao Paulo, Brazil
| | | | - Elizandra Gomes Pereira
- Department of Internal Medicine, Sao Paulo State University/UNESP, Medical School, Sao Paulo, Brazil
| | - Marcio Carlos Machado
- Neuroendocrine Unit, Division of Endocrinology and Metabolism, Hospital das Clínicas, University of Sao Paulo Medical School, Sao Paulo, Brazil
| | - Lucio Vilar
- Division of Endocrinology, Hospital das Clínicas, Federal University of Pernambuco, Recife, Brazil
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de Almeida TS, Rodrigues TDC, Costenaro F, Scaffaro LA, Farenzena M, Gastaldo F, Czepielewski MA. Enhancing Cushing's disease diagnosis: exploring the impact of desmopressin on ACTH gradient during BIPSS. Front Endocrinol (Lausanne) 2023; 14:1224001. [PMID: 37600715 PMCID: PMC10436086 DOI: 10.3389/fendo.2023.1224001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/11/2023] [Indexed: 08/22/2023] Open
Abstract
Introduction The differential diagnosis between Cushing's disease (CD) and ectopic ACTH syndrome (EAS) is complex, and bilateral inferior petrosal sinus sampling (BIPSS) is considered the gold-standard test. However, BIPSS with corticotropin-releasing hormone (CRH) stimulation is rarely available. Objective This retrospective cohort study aimed to assess the accuracy of the inferior petrosal sinus to peripheral ACTH gradient (IPS:P) before and after desmopressin stimulation for the differential diagnosis of ACTH-dependent Cushing's syndrome (CS), applying different cutoff values. Methods A total of 50 patients (48 with CD and 2 with EAS) who underwent BIPSS were included in this study. The sensitivity and specificity of IPS:P in BIPSS before and after desmopressin stimulation were evaluated. Various cutoff values for IPS:P were examined to determine their diagnostic accuracy. Results Using the traditional IPS:P cutoff, the sensitivity was 85.1% before stimulation, 89.6% after stimulation, and a combined sensitivity of 91.7%. Applying cutoff values of IPS:P >1.4 before and >2.8 after stimulation, the sensitivity was 87.2% and 89.6%, respectively, with a combined sensitivity of 91.7%. Receiver operating characteristic (ROC) curve analysis determined optimal cutoff values of 1.2 before stimulation and 1.57 after stimulation, resulting in a sensitivity of 93.6% and 93.8%, respectively, with a combined sensitivity of 97.9%. Specificity remained at 100% throughout all analyses. Among the 43 patients who responded positively to stimulation, 42 (97.7%) did so within the first three minutes, and all 43 (100%) did so within the first five minutes. None of the assessed clinical variables predicted the ACTH response to stimulation in BIPSS with statistical significance. Discussion ACTH stimulation with desmopressin during BIPSS improves the accuracy of IPS:P, making it a valuable tool for investigating ACTH-dependent Cushing's syndrome. Considering the low risk of complications, we recommend the use of desmopressin stimulation during BIPSS for the differential diagnosis of ACTH-dependent CS.
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Affiliation(s)
- Tobias Skrebsky de Almeida
- Postgraduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
- Endocrinology Division, Hospital Moinhos de Vento, Porto Alegre, Brazil
| | - Ticiana da Costa Rodrigues
- Postgraduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
- Endocrinology Division, Hospital Moinhos de Vento, Porto Alegre, Brazil
- Endocrinology Division, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Fabíola Costenaro
- Postgraduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
- Endocrinology Division, Hospital Moinhos de Vento, Porto Alegre, Brazil
| | - Leandro Armani Scaffaro
- Radiology Division, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Maurício Farenzena
- Radiology Division, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Fernando Gastaldo
- Department of Radiology, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
| | - Mauro Antônio Czepielewski
- Postgraduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
- Endocrinology Division, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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Lousada LM, Tapia MJB, Cescato VAS, da Silva GO, Musolino NRC, Fragoso MCBV, Bronstein MD, Machado MC. Pregnancy after pituitary surgery does not influence the recurrence of Cushing's disease. Endocrine 2022; 78:552-558. [PMID: 35930216 DOI: 10.1007/s12020-022-03151-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 07/18/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE Pregnancy is associated with the activation of the hypothalamus-pituitary-adrenal axis, which can cause a misdiagnosis of Cushing's syndrome. The aim of this study is to evaluate the impact of pregnancy after pituitary surgery on the recurrence rate in Cushing's disease (CD) patients. METHODS This was a retrospective study in a tertiary center. Between 1990 and 2020, 355 CD patients underwent pituitary surgery. Of those, we included 113 female patients who were ≤ 45 years old (median age of 32 years, 14-45), PS remission, a follow-up of ≥6 months (median of 122 months, 6-402) and an available obstetric history. Recurrence was defined as the diagnosis of Cushing's syndrome via at least two altered first-line methods. The patients were divided into two subgroups according to pregnancy: no pregnancy or pregnancy prior to CD diagnosis (NP/PP) and pregnancy after CD pituitary surgery (PA). RESULTS Overall, recurrence occurred in 43 out of 113 patients (38%). A higher recurrence rate was seen in the PA subgroup (11/22, 50%), but there was no significant difference between the NP/PP subgroup (32/91, 35%). No difference in survival-free recurrence (SFR) was found between NP/PP and PA subgroups. The lower SFR was related to a higher PS plasma ACTH and normal pituitary at pathological analyses. CONCLUSIONS There was no difference in the recurrence rate in patients according to pregnancy history. Other studies with higher numbers of patients are needed to confirm these data.
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Affiliation(s)
- Lia Mesquita Lousada
- Neuroendocrine Unit, Division of Endocrinology and Metabolism, University of Sao Paulo Medical School, Sao Paulo, SP, Brazil
| | - Mariuxi Jacqueline Borja Tapia
- Neuroendocrine Unit, Division of Endocrinology and Metabolism, University of Sao Paulo Medical School, Sao Paulo, SP, Brazil
| | | | | | | | | | - Marcello Delano Bronstein
- Neuroendocrine Unit, Division of Endocrinology and Metabolism, University of Sao Paulo Medical School, Sao Paulo, SP, Brazil
- Laboratory of Cellular and Molecular Endocrinology LIM-25, University of Sao Paulo Medical School, Sao Paulo, SP, Brazil
| | - Marcio Carlos Machado
- Neuroendocrine Unit, Division of Endocrinology and Metabolism, University of Sao Paulo Medical School, Sao Paulo, SP, Brazil.
- Laboratory of Cellular and Molecular Endocrinology LIM-25, University of Sao Paulo Medical School, Sao Paulo, SP, Brazil.
- Endocrinology Service, AC Camargo Cancer Center, Sao Paulo, SP, Brazil.
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Kannankeril J, Carroll T, Findling JW, Javorsky B, Gunsolus IL, Phillips J, Raff H. Prospective Evaluation of Late-Night Salivary Cortisol and Cortisone by EIA and LC-MS/MS in Suspected Cushing Syndrome. J Endocr Soc 2020; 4:bvaa107. [PMID: 32935666 PMCID: PMC7480956 DOI: 10.1210/jendso/bvaa107] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 07/20/2020] [Indexed: 01/15/2023] Open
Abstract
Context Late-night salivary cortisol (LNSC) measured by enzyme immunoassay (EIA-F) is a first-line screening test for Cushing syndrome (CS) with a reported sensitivity and specificity of >90%. However, liquid chromatography-tandem mass spectrometry, validated to measure salivary cortisol (LCMS-F) and cortisone (LCMS-E), has been proposed to be superior diagnostically. Objective, Setting, and Main Outcome Measures Prospectively evaluate the diagnostic performance of EIA-F, LCMS-F, and LCMS-E in 1453 consecutive late-night saliva samples from 705 patients with suspected CS. Design Patients grouped by the presence or absence of at least one elevated salivary steroid result and then subdivided by diagnosis. Results We identified 283 patients with at least one elevated salivary result; 45 had an established diagnosis of neoplastic hypercortisolism (CS) for which EIA-F had a very high sensitivity (97.5%). LCMS-F and LCMS-E had lower sensitivity but higher specificity than EIA-F. EIA-F had poor sensitivity (31.3%) for adrenocorticotropic hormone (ACTH)-independent CS (5 patients with at least 1 and 11 without any elevated salivary result). In patients with Cushing disease (CD), most nonelevated LCMS-F results were in patients with persistent/recurrent CD; their EIA-F levels were lower than in patients with newly diagnosed CD. Conclusions Since the majority of patients with ≥1 elevated late-night salivary cortisol or cortisone result did not have CS, a single elevated level has poor specificity and positive predictive value. LNSC measured by EIA is a sensitive test for ACTH-dependent Cushing syndrome but not for ACTH-independent CS. We suggest that neither LCMS-F nor LCMS-E improves the sensitivity of late-night EIA-F for CS.
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Affiliation(s)
- Joshua Kannankeril
- Division of Endocrinology and Molecular Medicine, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Ty Carroll
- Endocrinology Center and Clinics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - James W Findling
- Endocrinology Center and Clinics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Bradley Javorsky
- Endocrinology Center and Clinics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Ian L Gunsolus
- Department of Pathology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jonathan Phillips
- Endocrine Research Laboratory, Aurora St. Luke's Medical Center, Advocate Aurora Research Institute, Milwaukee, Wisconsin
| | - Hershel Raff
- Division of Endocrinology and Molecular Medicine, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin.,Endocrine Research Laboratory, Aurora St. Luke's Medical Center, Advocate Aurora Research Institute, Milwaukee, Wisconsin
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Soares VR, Silva Martins C, Martinez EZ, Araujo LD, Roa SLR, Silva LR, Moreira AC, De Castro M. Peripheral clock system circadian abnormalities in Cushing's disease. Chronobiol Int 2020; 37:867-876. [PMID: 32354240 DOI: 10.1080/07420528.2020.1758126] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In Cushing's syndrome, the cortisol rhythm is impaired and can be associated with the disruption in the rhythmic expression of clock genes. In this study, we evaluated the expression of CLOCK, BMAL1, CRY1, CRY2, PER1, PER2, PER3 genes in peripheral blood leukocytes of healthy individuals (n = 13) and Cushing's disease (CD) patients (n = 12). Participants underwent salivary cortisol measurement at 0900 h and 2300 h. Peripheral blood samples were obtained at 0900 h, 1300 h, 1700 h, and 2300 h for assessing clock gene expression by qPCR. Gene expression circadian variations were evaluated by the Cosinor method. In healthy controls, a circadian variation in the expression of CLOCK, BMAL1, CRY1, PER2, and PER3 was observed, whereas the expression of PER1 and CRY2 followed no specific pattern. The expression of PER2 and PER3 in healthy leukocytes presented a late afternoon acrophase, similarly to CLOCK, whereas CRY1 showed night acrophase, similarly to BMAL1. In CD patients, the circadian variation in the expression of clock genes was lost, along with the abolition of cortisol circadian rhythm. However, CRY2 exhibited a circadian variation with acrophase during the dark phase in patients. In conclusion, our data suggest that Cushing's disease, which is characterized by hypercortisolism, is associated with abnormalities in the circadian pattern of clock genes. Higher expression of CRY2 at night outlines its putative role in the cortisol circadian rhythm disruption.
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Affiliation(s)
- Vinicius Reis Soares
- Department of Internal Medicine; Ribeirao Preto Medical School, University of Sao Paulo , São Paulo, Brazil
| | - Clarissa Silva Martins
- Department of Internal Medicine; Ribeirao Preto Medical School, University of Sao Paulo , São Paulo, Brazil
| | - Edson Zangiacomi Martinez
- Department of Social Medicine; Ribeirao Preto Medical School, University of Sao Paulo , São Paulo, Brazil
| | - Leonardo Domingues Araujo
- Department of Internal Medicine; Ribeirao Preto Medical School, University of Sao Paulo , São Paulo, Brazil
| | - Silvia Liliana Ruiz Roa
- Department of Internal Medicine; Ribeirao Preto Medical School, University of Sao Paulo , São Paulo, Brazil
| | - Lucas Ravagnani Silva
- Department of Internal Medicine; Ribeirao Preto Medical School, University of Sao Paulo , São Paulo, Brazil
| | - Ayrton Custodio Moreira
- Department of Internal Medicine; Ribeirao Preto Medical School, University of Sao Paulo , São Paulo, Brazil
| | - Margaret De Castro
- Department of Internal Medicine; Ribeirao Preto Medical School, University of Sao Paulo , São Paulo, Brazil
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Lee S, Lee A, Chai SH, Lee S, Kweon OK, Kim WH. Ectopic Cushing's syndrome associated with a pheochromocytoma in a dog: a case report. BMC Vet Res 2020; 16:35. [PMID: 32014021 PMCID: PMC6998063 DOI: 10.1186/s12917-020-2244-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 01/16/2020] [Indexed: 11/26/2022] Open
Abstract
Background Ectopic Cushing’s syndrome (ECS) associated with malignant tumors, such as small cell lung carcinoma, bronchial carcinoids, and pheochromocytoma, has been reported in human medicine. However, ECS related to pheochromocytoma has not been reported in dogs. Case presentation An 11-year-old castrated, male Scottish terrier was diagnosed with a left adrenal mass. Cushing’s syndrome was suspected based on clinical signs, including pot belly, polyuria, polydipsia, bilateral alopecia, recurrent pyoderma, and calcinosis cutis. Cushing’s syndrome was diagnosed on the basis of consistent clinical signs and repeated adrenocorticotropic hormone (ACTH) stimulation tests. In addition, tests for fractionated plasma metanephrine/normetanephrine suggested a pheochromocytoma. Unilateral adrenalectomy was performed after medical management with trilostane and phenoxybenzamine. Histopathology confirmed a diagnosis of pheochromocytoma without cortical lesions. After surgery, fractionated metanephrine/normetanephrine and the findings of low-dose dexamethasone suppression and ACTH stimulation tests were within the normal ranges without any medication. There were no clinical signs or evidence of recurrence and metastasis on thoracic and abdominal X-rays and ultrasonography up to 8 months after surgery. Conclusions Pheochromocytoma should be considered a differential diagnosis for dogs with Cushing’s syndrome with an adrenal tumor. A good prognosis can be expected with prompt diagnosis and surgical intervention.
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Affiliation(s)
- Sungin Lee
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| | - Aeri Lee
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| | - Suh-Hyun Chai
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| | - Seulji Lee
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| | - Oh-Kyeong Kweon
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| | - Wan Hee Kim
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea.
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Warszawski L, Esteves GSC, Pagnocelli A, Bouzon BDL, Oliveira SLD. SELLA TURCICA 3T MAGNETIC RESONANCE IMAGING IN THE DIAGNOSIS OF CUSHING'S DISEASE IN CHILDREN: TWO CASE REPORTS. ACTA ACUST UNITED AC 2019; 37:386-391. [PMID: 31090849 PMCID: PMC6868556 DOI: 10.1590/1984-0462/;2019;37;3;00009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 04/10/2018] [Indexed: 11/22/2022]
Abstract
Objective: To present two clinical cases of pediatric Cushing disease caused by
adrenocorticotropic hormone secreting pituitary adenomas, which were
diagnosed by magnetic resonance imaging using 3 Tesla technology. Case description: Two cases of Cushing disease in 9-year-old children are reported. Both
children presented pituitary adenomas that were smaller than 5 mm at their
largest diameter, and which were not seen by standard 1.5 Tesla resonance.
One of the patients was submitted to bilateral and simultaneous
catheterization of the inferior petrosal sinus, but the result was
undetermined. In both cases, the pituitary adenoma was detected by 3 Tesla
magnetic resonance imaging. Both patients underwent transsphenoidal surgery
and were cured. Comments: Cushing disease presents high morbidity. Therefore, early diagnosis and
prompt treatment are essential. It is usually caused by adenomas that are
smaller than 5 mm in diameter. Surgery is the first line of treatment, and
effective methods of locating the adenoma are necessary for greater
therapeutic success. This report suggests that the 3 Tesla magnetic
resonance imaging is more sensitive, and thus able to detect pituitary
microadenomas (largest diameter <10 mm). This exam may be indicated as a
low-morbidity diagnostic tool for finding pituitary microadenomas in Cushing
disease that are not visualized by 1.5 Tesla magnetic resonance imaging.
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Affiliation(s)
- Leila Warszawski
- Instituto Estadual de Diabetes e Endocrinologia Luis Capriglione, Rio de Janeiro, RJ, Brazil
| | | | - Ariane Pagnocelli
- Instituto Estadual de Diabetes e Endocrinologia Luis Capriglione, Rio de Janeiro, RJ, Brazil
| | - Bruna de Lacerda Bouzon
- Instituto Estadual de Diabetes e Endocrinologia Luis Capriglione, Rio de Janeiro, RJ, Brazil
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Barros APT, Lamback EB, Coelho MCA, Neto LV. LIMITATIONS OF BASAL CORTISOL IN THE DIAGNOSIS OF CUSHING SYNDROME. AACE Clin Case Rep 2018; 5:e91-e94. [PMID: 31967009 DOI: 10.4158/accr-2018-0336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Accepted: 09/01/2018] [Indexed: 11/15/2022] Open
Abstract
Objective Cushing syndrome (CS) is one of the most challenging diseases to diagnose due to the difficulties that may arise during laboratory test interpretations. A random serum cortisol level is often obtained by a general practitioner as a first step in the work-up of suspected CS patients. In this respect, it is rarely useful and has limitations. Methods We report an extremely unusual case of a female patient who presented with adrenocorticotropic hormone-independent CS and corticosteroid-binding globulin (CBG) deficiency. Results The patient was initially misdiagnosed with and treated for adrenal insufficiency because of persistently low basal cortisol levels, in detriment of her exacerbated Cushing features and symptoms. Conclusion We describe the limitations of using basal cortisol in the diagnosis of CS and review the differential diagnosis of patients with CS who have low basal cortisol. CBG variants may explain the findings of high urinary and salivary cortisol, in the absence of increased serum cortisol.
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Gounden V, Rampursat YD, Jialal I. Secretory tumors of the pituitary gland: a clinical biochemistry perspective. ACTA ACUST UNITED AC 2018; 57:150-164. [DOI: 10.1515/cclm-2018-0552] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 07/16/2018] [Indexed: 12/24/2022]
Abstract
Abstract
The pituitary gland is responsible for the production and/or secretion of various hormones that play a vital role in regulating endocrine function within the body. Secretory tumors of the anterior pituitary predominantly, pituitary adenomas, collectively account for 10%–25% of central nervous system tumors requiring surgical treatment. The most common secretory tumors are prolactinomas, which can be diagnosed by basal prolactin levels. Acromegaly can be diagnosed by basal insulin growth-like factor 1 levels and the failure of growth hormone (GH) to suppress during an oral glucose tolerance test. Cushing disease can be diagnosed by demonstrating hypercortisolemia evidenced by increased salivary cortisol levels in the evening, increased urine free cortisol excretion and failure of plasma cortisol to suppress following oral dexamethasone given overnight (1.0 mg). We also discuss the diagnosis of the rarer thyroid-stimulating hormone and gonadotrophin secretory tumors. Morbidity is associated with tumor occurrence, clinical sequelae as well as the related medical, surgical and radiological management. This review focuses on the pathogenesis of secretory tumors of the anterior pituitary with emphasis on molecular mechanisms associated with tumorigenesis and the major role of the clinical chemistry laboratory in diagnosis and management of these tumors.
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Affiliation(s)
- Verena Gounden
- Department of Chemical Pathology , University of KwaZulu Natal and National Health Laboratory Services, Inkosi Albert Luthuli Central Hospital , Durban , South Africa
| | - Yashna D. Rampursat
- Department of Chemical Pathology , University of KwaZulu Natal and National Health Laboratory Services, Inkosi Albert Luthuli Central Hospital , Durban , South Africa
| | - Ishwarlal Jialal
- California North-State University, College of Medicine , Elk Grove, CA 95757 , USA
- Director, Section of Clinical Chemistry, VA Medical Center , Sacramento, CA , USA
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De Sousa SMC, McCormack AI, McGrath S, Torpy DJ. Prolactin correction for adequacy of petrosal sinus cannulation may diminish diagnostic accuracy in Cushing's disease. Clin Endocrinol (Oxf) 2017. [PMID: 28626863 DOI: 10.1111/cen.13401] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Petrosal venous prolactin concentrations have been promoted to improve the diagnostic accuracy of inferior petrosal sinus sampling (IPSS), beyond that achieved with ACTH measurement alone, in diagnosing a pituitary ACTH source and determining corticotrophinoma side (L/R). Our objective was to assess the effect of using prolactin to confirm adequacy of petrosal cannulation in a cohort of patients with ACTH-dependent Cushing's syndrome. DESIGN Retrospective cohort study. PATIENTS Thirteen patients with clinical and biochemical Cushing's syndrome who underwent IPSS. MEASUREMENTS Serum prolactin and ACTH in peripheral and inferior petrosal sinus blood before and after corticotrophin-releasing hormone (CRH) injection. RESULTS Thirteen consecutive patients were diagnosed with Cushing's disease using uncorrected ACTH ratios. The side of PRL excess was the same as the side of ACTH excess in all cases. Use of various published prolactin-related equations suggested that the ACTH non-dominant side was not cannulated in four, six or seven patients depending on the equation used. The equations generally decreased the central-to-peripheral gradient on the uncorrected ACTH dominant side, increased the central-to-peripheral gradient on the contralateral side and diminished or even reversed the ACTH intersinus gradient. CONCLUSIONS Consistent co-lateralisation of prolactin and ACTH in IPSS strongly suggests that prolactin cannot act as an independent guide to the diagnosis and lateralisation of Cushing's disease. All patients with Cushing's disease had a prolactin intersinus gradient towards the tumourous side of the pituitary, for likely biological reasons. PRL-corrected ACTH concentrations may threaten the sensitivity and specificity of IPSS in diagnosing Cushing's disease and conceal lateralisation.
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Affiliation(s)
- Sunita M C De Sousa
- Endocrine and Metabolic Unit, Royal Adelaide Hospital, Adelaide, SA, Australia
- School of Medicine, University of Adelaide, Adelaide, SA, Australia
- Molecular Pathology Research Laboratory, Centre for Cancer Biology, an SA Pathology and UniSA alliance, Adelaide, SA, Australia
| | - Ann I McCormack
- Hormones and Cancer Group, Garvan Institute of Medical Research, Sydney, NSW, Australia
- Department of Endocrinology, St Vincent's Hospital, Sydney, NSW, Australia
| | - Shaun McGrath
- Department of Endocrinology, John Hunter Hospital, Newcastle, NSW, Australia
| | - David J Torpy
- Endocrine and Metabolic Unit, Royal Adelaide Hospital, Adelaide, SA, Australia
- School of Medicine, University of Adelaide, Adelaide, SA, Australia
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Pappachan JM, Hariman C, Edavalath M, Waldron J, Hanna FW. Cushing's syndrome: a practical approach to diagnosis and differential diagnoses. J Clin Pathol 2017; 70:350-359. [PMID: 28069628 DOI: 10.1136/jclinpath-2016-203933] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 11/01/2016] [Accepted: 12/08/2016] [Indexed: 02/05/2023]
Abstract
Diagnosis of Cushing's syndrome (CS) and identification of the aetiology of hypercortisolism can be challenging. The Endocrine Society clinical practice guidelines recommends one of the four tests for initial screening of CS, namely, urinary-free cortisol, late night salivary cortisol, overnight dexamethasone suppression test or a longer low-dose dexamethasone suppression test, for 48 hours. Confirmation and localisation of CS requires additional biochemical and radiological tests. Radiological evaluation involves different imaging modalities including MRI with or without different radio-nuclear imaging techniques. Invasive testing such as bilateral inferior petrosal sinus sampling may be necessary in some patients for accurate localisation of the cause for hypercortisolism. This best practice review discusses a practical approach for the diagnostic evaluation of CS with a brief discussion on differential diagnoses, and cyclical CS, to enhance the skills of clinicians and laboratory personnel.
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Affiliation(s)
- Joseph M Pappachan
- Department of Endocrinology & Diabetes, New Cross Hospital, The Royal Wolverhampton Hospitals NHS Trust, Wolverhampton, UK
| | - Christian Hariman
- Department of Endocrinology & Diabetes, New Cross Hospital, The Royal Wolverhampton Hospitals NHS Trust, Wolverhampton, UK
| | - Mahamood Edavalath
- Department of Endocrinology & Diabetes, Imperial College London Diabetes Centre, Abu Dhabi, UAE
| | - Julian Waldron
- Department of Clinical Biochemistry, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, UK
| | - Fahmy W Hanna
- Department of Endocrinology & Diabetes, University Hospitals of North Midlands NHS Trust & North Staffordshire University, Stoke-on-Trent, UK
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