Impaired bone microarchitecture and strength in patients with tumor-induced osteomalacia.

Some studies based on bone biopsy have demonstrated that in patients with tumor-induced osteomalacia (TIO) the mineralization process of the bone matrix is profoundly disturbed. However, the interrelationship between clinical and biochemical features and bone microarchitecture in this disease needs further analysis. With this purpose in mind, we set out three objectives: (i) to determine bone microarchitecture and estimated bone strength in a group of patients with tumor-induced osteomalacia using high-resolution peripheral quantitative computed tomography (HR-pQCT) and finite element analysis (FEA), (ii) to investigate correlations between duration of disease, biochemical features, bone density, HR-pQCT and FEA parameters, and (iii) to compare HR-pQCT and FEA parameters with a healthy control group. Ten patients with TIO were included. All patients had non-resolved disease. At the distal radius, all bone microarchitecture parameters were significantly affected in patients with TIO in comparison with healthy controls. At the distal tibia, all parameters were significantly impaired, except for trabecular thickness. All the parameters were more affected in the distal tibia than in the distal radius. Women with TIO (n = 7) had significantly lower bone strength parameters than healthy controls. In men (n = 3), bone strength parameters were significantly lower than in the control group at the distal tibia. Alkaline phosphatase levels exhibited a negative correlation with microarchitecture parameters, failure load, and stiffness. Higher levels of parathyroid hormone correlated with poorer microarchitecture parameters. We believe that in TIO, hormonal disturbances and the lack of mechanical stimulus specially converge to generate an extremely harmful combination for bone health. © 2021 American Society for Bone and Mineral Research (ASBMR).

Burden of Disease in Patients With Tumor-Induced Osteomalacia.

Tumor-induced osteomalacia (TIO) is a chronic condition associated with muscle weakness and long-term disability. We conducted a cross-sectional study of patients diagnosed with TIO who had been referred to our institution between May 2018 and December 2019. Our aim was to assess health-related quality of life (HRQoL), fatigue, pain, and muscle mass and strength in these patients. Detailed information was obtained regarding general characteristics, initial symptoms and biochemical parameters measured at diagnosis and on the first visit to our institution. Fatigue was assessed using the Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-Fatigue) scale, pain using the Brief Pain Inventory-Short Form (BPI-sf) scale and HRQoL by the 36-item Short Form survey (SF-36) questionnaire. Eight patients were included in the study: three without tumor localization, four with nonremission after surgery, and one with clinical recurrence 2 years after surgery. Fatigue experienced by patients with TIO was significantly higher compared to the general population (p ˂ .0001). The physical summary measure of the SF-36 showed significantly lower values than those of the Argentinean population with chronic conditions (mean 20.4 versus 45.9, p < .0001). According to the BPI-sf, patients with TIO have moderate average pain and the pain interferes severely with walking, general activities, work, and mood. Seven patients had a diagnosis of sarcopenia, four of which had severe sarcopenia. To our best knowledge, this is the first study aimed to quantify fatigue, pain, HRQoL, and muscle mass and strength in a group of patients with TIO. We hope our results contribute to a better understanding of the burden of disease and to establish a basis for future studies-with larger samples-which will make it possible to assess the efficacy of therapeutic interventions for these conditions. © 2020 American Society for Bone and Mineral Research © 2020 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.

Temozolomide Therapy for Aggressive Pituitary Tumors: Results in a Small Series of Patients from Argentina.

We evaluated results of temozolomide (TMZ) therapy in six patients, aged 34-78 years, presenting aggressive pituitary tumors. In all the patients tested O(6)-methylguanine-DNA methyltransferase (MGMT) immunoexpression in surgical specimens was absent. Patients received temozolomide 140-320 mg/day for 5 days monthly for at least 3 months. In two patients minimum time for evaluation could not be reached because of death in a 76-year-old man with a malignant prolactinoma and of severe neutro-thrombopenia in a 47-year-old woman with nonfunctioning pituitary adenoma. In two patients (a 34-year-old acromegalic woman and a 39-year-old woman with Nelson's syndrome) no response was observed after 4 and 6 months, respectively, and the treatment was stopped. Conversely, two 52- and 42-year-old women with Cushing's disease had long-term total clinical and radiological remissions which persisted after stopping temozolomide. We conclude that TMZ therapy may be of variable efficacy depending on-until now-incompletely understood factors. Cooperative work on a greater number of cases of aggressive pituitary tumors should be crucial to establish the indications, doses, and duration of temozolomide administration.

Tumores suprarrenales feminizantes en España: aportación de un caso y revisión de los cinco pacientes descritos / Feminizing adrenal tumors in Spain: report of a case and review of the five previously published patients

Los tumores adrenales feminizantes son muy raros. Se presenta el estudio clínico y hormonal de un varón de 49 años hasta su fallecimiento, 6 años después del diagnóstico, junto con una revisión de los otros 5 casos descritos en España. El paciente consultó por ginecomastia y disminución de la libido; se halló gran elevación de estrógenos, testosterona en el límite bajo de la normalidad y un tumor suprarrenal derecho que, al extirparlo, se observó que era de histología benigna, informado como adenoma. Tres años después, reapareció la clínica junto con aumento de estrógenos, glucocorticoides y andrógenos; se objetivó recidiva tumoral en el polo superior del riñón derecho y metástasis peritoneales, hepáticas y pulmonares. Tratado con mitotano y aminoglutetimida, las concentraciones hormonales descendieron transitoriamente, pero volvieron a aumentar hasta su fallecimiento a los 6 años del diagnóstico inicial. Resalta en este caso el carácter aparentemente benigno y unisecretor del tumor para recidivar a los 3 años con carácter maligno y plurisecretor y metástasis generalizadas sin respuesta al tratamiento médico (AU)

Feminizing adrenal tumours are very rare. We report the clinical and hormonal study of a case, a 49 years old male, since his first consultation until his death 6 years after the initial diagnosis, and a review of the other 5 Spanish patients previously published. His initial symptoms were gynecomastia and libido decrease, with increase of plasmatic and urinary oestrogen levels, plasma testosterone near low normal level and a right adrenal gland tumour that, after its removal, showed a benign histology and was classified as an adrenocortical adenoma. Three years after, initial symptoms returned, with oestrogen, glucocorticoid and androgen hypersecretion, tumour local relapse and peritoneal, liver and lung metastasis. After mitotane and aminoglutethimide therapy, hormonal concentrations fell temporary and then raised again until his death 3 years later. The main special feature of this case is the apparently benign initial adrenal tumour with only oestrogen hypersecretion, and its relapse 3 years later with secretion of several steroid hormones, generalized metastasis and no response to medical therapy (AU)

[Feminizing adrenal tumours in Spain: report of a case and review of the five previously published patients]. / Tumores suprarrenales feminizantes en España: aportación de un caso y revisión de los cinco pacientes descritos.

Feminizing adrenal tumours are very rare. We report the clinical and hormonal study of a case, a 49 years old male, since his first consultation until his death 6 years after the initial diagnosis, and a review of the other 5 Spanish patients previously published. His initial symptoms were gynecomastia and libido decrease, with increase of plasmatic and urinary oestrogen levels, plasma testosterone near low normal level and a right adrenal gland tumour that, after its removal, showed a benign histology and was classified as an adrenocortical adenoma. Three years after, initial symptoms returned, with oestrogen, glucocorticoid and androgen hypersecretion, tumour local relapse and peritoneal, liver and lung metastasis. After mitotane and aminoglutethimide therapy, hormonal concentrations fell temporary and then raised again until his death 3 years later. The main special feature of this case is the apparently benign initial adrenal tumour with only oestrogen hypersecretion, and its relapse 3 years later with secretion of several steroid hormones, generalized metastasis and no response to medical therapy.