Cyclical Cushing's: how best to catch the ups and downs

Diagnosing cyclical Cushing's syndrome remains a challenge in clinical endocrinology. Standard biochemical tests often fail to capture intermittent hormone fluctuations. Prior research has shown that most cases present with persistent hypercortisolaemia, but cyclical patterns are less understood. No prior work had resolved how to distinguish cyclical from non-cyclical cases using available diagnostic tools. This gap motivated the need for detailed case analysis to refine diagnostic approaches. The patient's fluctuating symptoms and variable test results highlighted limitations in current testing protocols. Researchers propose that salivary cortisol monitoring paired with symptom tracking may improve detection accuracy. This case study provides insights into managing complex endocrine presentations.

The aim of this case report is to explore diagnostic strategies for cyclical Cushing's syndrome. The patient's variable test results and symptoms indicated a need for more precise monitoring techniques. This paper's contribution lies in demonstrating how salivary cortisol and ACTH measurements can track cyclical patterns. The specific problem addressed is the difficulty in diagnosing intermittent hypercortisolaemia. The motivation stems from the patient's failure to respond to standard diagnostic approaches. This case illustrates the importance of correlating biochemical findings with clinical symptoms. Researchers propose that cyclical cases require tailored testing protocols. This report emphasizes the value of longitudinal data collection in complex endocrine disorders.

The patient's condition was evaluated using 24-hour cortisol excretion and dexamethasone suppression tests. Salivary cortisol levels were measured alongside a detailed symptom diary. ACTH levels were monitored during both normal and hypercortisolaemic phases. Inferior petrosal sinus sampling was performed during an active phase of the cycle. The patient underwent pituitary exploration followed by bilateral adrenalectomy. Post-surgical outcomes were tracked through symptom resolution and medication changes. Serum cortisol and ACTH levels were re-evaluated after surgery. The study combined biochemical testing with clinical observation to assess treatment response.

Salivary cortisol measurements confirmed cyclical hypercortisolaemia patterns. ACTH levels were consistently elevated during symptomatic episodes. Inferior petrosal sinus sampling suggested a central ACTH source. The patient's symptoms resolved rapidly after bilateral adrenalectomy. Oral hypoglycaemic agents were no longer needed six months post-surgery. Antihypertensive medications were also discontinued within the same timeframe. Biochemical markers normalized following surgical intervention. The results suggest that cyclical Cushing's can be effectively managed through adrenalectomy.

The authors propose that cyclical Cushing's requires tailored diagnostic approaches. Salivary cortisol paired with symptom tracking improves diagnostic accuracy. The study suggests that central ACTH sources may be responsible in some cyclical cases. Bilateral adrenalectomy appears to be an effective treatment option. Post-surgical outcomes indicate rapid symptom improvement and medication independence. This case highlights the limitations of standard testing in cyclical presentations. Researchers propose that longitudinal monitoring is essential for accurate diagnosis. The findings suggest that cyclical Cushing's may benefit from surgical intervention.