The objective of the study was to assess the prevalence and clinical features of incidentally discovered clinically non-functioning pituitary adenoma (CNFPA) and to analyze its natural history. A multicenter retrospective study in patients diagnosed with incidental CNFPA periodically followed-up in 3 specialized neuroendocrinology units from 1992 to 2015 was performed. Out of a total of 189 CNFPA patients, 57 cases (30.1%; 29 women; age at diagnosis 55.8±16.7 years) were incidental. Most patients (n=55, 96.5%) were diagnosed by magnetic resonance imaging (MRI). A sum of 71.9% (n=41) were macroadenomas; 2 of them (3.5%) were giant adenomas (≥4 cm). Patients with macroadenomas were older than those with microadenomas (59.5±16.7 vs. 46.4±18.1 years, p=0.007). Macroadenomas were more common in men (85.7% vs. 58.6%, p=0.023). Twenty-eight patients (49.1%) showed suprasellar extension; of these, 19 were accompanied by chiasmatic compression. Hypopituitarism was present in 14 (24.6%) patients; which was partial in 13 patients (22.8%) and complete in one patient (1.8%). The gonadal axis was the most frequently affected (n=13, 22.8%). Twenty four patients (42.1%) underwent surgery. Of the non-operated patients, 26 patients could be evaluated morphologically after a median follow-up of 15.5 months (interquartile range, 5.7-32.7 months). No significant changes were found in the maximum tumor diameter at the end of follow-up (1.2±0.6 vs 1.2±0.7 cm). The majority of CNFPAs evaluated (n=23, 88.5%) did not show any changes in size. In 2 cases (7.7%) tumor size decreased, and in one patient (3.8%) increased. In our series of CNFPA patients, approximately one-third were incidental. These tumors were diagnosed by MRI preferably from the 5th decade of life without sex predilection. Most of them were macroadenomas, more commonly diagnosed in men and at an older age, compared to microadenomas. The suprasellar extension with chiasmatic compression and hypopituitarism were frequent at diagnosis. Most of the non-operated incidental CNFPAs remain with stable tumor size over time, growth being an unusual event.

NFPAs surgically treated in Spain are usually macroadenomas diagnosed around the sixth decade of life with no sex predilection. Type of surgery is associated with clinical outcome. Endoscopic endonasal surgery behaves as a positive predictor for the absence of tumor imaging and complete cure in the follow up.

Objective To assess the evolution of joint mobility over a period of 15 years in type 1 diabetic patients and healthy controls and to determine whether microalbuminuria is associated with a different evolution of joint mobility. Methods Joint mobility of hand and wrist was determined in 63 patients with type 1 diabetes and 63 healthy subjects. Fifteen years later, 37 (58.7%) diabetic patients and 16 (25.4%) healthy subjects were studied again. Joint mobility was assessed with the Prayer sign and by measuring the angle of maximal flexion of the fifth and third metacarpophalangeal (MCP) joints and wrist. Patients with diabetes were visited 2–4 times every year with regular assessment of glycated hemoglobin (HbA1c), urinary albumin excretion (UAE), and ophthalmoscopy. Results Fifteen years after the initial exam, diabetic patients showed reduced flexion of the fifth MCP joint (82.6 ± 5.8 versus 76.0 ± 6.4 degrees, p < 0.001) and wrist (75.9 ± 8.1 versus 73.2 ± 7.4 degrees, p = 0.015) compared to baseline examination. Joint mobility did not change significantly in healthy subjects. Patients with microalbuminuria showed greater reduction in hand joint mobility than diabetic patients with normal UAE or than healthy subjects (p < 0.001). Conclusions In type 1 diabetic patients, the severity of LJM progresses with time, and the progression is enhanced in patients with microalbuminuria.

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Objetive: To assess the clinical features of incidental clinically non-functioning pituitary adenoma (NFPA) and to analyze its natural history. Methods: A multicenter retrospective study in patients with NFPA followed-up from 1992 to 2015 was performed. Results: Fifty-seven patients were studied (29 women (50.9%); age 55.8±16.7 years. 43.9% were older than 60 years, 40.3% belonged to the age group of 40-60 years and 15.8% were younger than 40 years. Most patients (n=55, 96.5%) were diagnosed by magnetic resonance imaging (MRI). 71.9% (n=41) were macroadenomas; 2 of them (3.5%) were giant adenomas (≧4 cm). Patients with macroadenomas were older than those with microadenomas (59.5±16.7 vs 46.4±18.1 years, P=0.007). Microadenomas were more common in women (41.3 vs 14.3%, P=0.023). About half of them (n=28; 49.1%) showed suprasellar extension; of these, 19 (33.3%) were accompanied by chiasmatic compression. Invasion of the cavernous sinuses was present in 28.1% (n=16). Hypopituitarism was present in 14 (24.6%) patients. Twenty-four patients (42.1%) underwent surgery. Twenty-six non-operated patients were evaluated after a median follow-up of 15.5 months (interquartile range, 5.7-32.7). No significant changes were found in the maximum tumor diameter at the end of follow-up (1.2±0.6 vs 1.2±0.7 cm; NS). The majority of NFPAs evaluated (n=23, 88.5%) did not show any changes in size. In two cases (7.7%) tumor size decreased and in one patient (3.8%) increased. Conclusion: Incidental NFPA is diagnosed by MRI preferably from the 5th decade of life without sex predilection. Most of them are macroadenomas, more commonly diagnosed in men and at an older age, compared to microadenomas. The suprasellar extension with chiasmatic compression and hypopituitarism are frequent at diagnosis. Most of the non-operated NFPAs remain with stable tumor size over time, being growth an unusual event.