Insulinoma: Metastatic Recurrence 38 Years Following Initial Diagnosis in Pregnancy

A case of recurrent insulinoma spanning 4 decades is described. Following a delayed diagnosis, hyperinsulinemic hypoglycemia was confirmed in a 24-year-old woman during early pregnancy. Initial surgery, culminating in subtotal pancreatectomy, was noncurative. A 1-cm insulinoma was subsequently resected from the head of the pancreas postpartum, with postoperative resolution of hypoglycemia. However, 32 years later, the patient experienced a recurrence of hypoglycemic symptoms. Eventually, a subcentimeter extrapancreatic lesion was identified anterior to the pancreatic head on gallium-68 DOTA-Exendin-4 positron emission tomography/computed tomography. In 2022, a third operation was performed, with excision of a 4 × 3 mm tumor adjacent to the pancreatic head, and histology confirming insulinoma. She was again cured of symptoms.

Surgical management of Graves disease in childhood and adolescence: an institutional experience

BACKGROUND

Graves disease is the most common cause of hyperthyroidism in children. Medical therapy, radioiodine ablation, and thyroidectomy are all treatment options. To evaluate the safety and efficacy of operative therapy, we updated our operative experience with pediatric Graves disease at a single tertiary care center.

METHODS

The medical records of children <18 years old who underwent thyroidectomy for Graves disease between 1986-2003 were reviewed.

RESULTS

We identified 78 patients (median age, 13.8 years; 87% female). The most common presenting signs and symptoms included heat intolerance (61%), decreased academic performance (50%), tremor (49%), and ophthalmopathy (43%). All patients had clinical and laboratory evidence of autoimmune thyrotoxicosis. Sixty-nine percent chose operative therapy because of failure of medical therapy or adverse drug reactions. Near-total thyroidectomy was the most common surgical procedure performed (65%). Pathology demonstrated previously unrecognized thyroid malignancies in 4 (5%) patients. Operative morbidities were transient and included hypoparathyroidism (6%) and recurrent laryngeal nerve neuropraxia (1%). Three (4%) patients who underwent subtotal thyroidectomy developed recurrent hyperthyroidism; all were treated successfully with radioiodine ablation. Of patients presenting with ophthalmopathy, 85% noted improvement postoperatively, while 1 (3%) patient experienced worsening of symptoms. Only 5% developed new-onset Graves ophthalmopathy after operation.

CONCLUSIONS

Near-total thyroidectomy for Graves disease in children is safe and effective when performed by experienced thyroid surgeons. In addition to relief of systemic symptoms, the majority of patients presenting with Graves ophthalmopathy experienced improvement of their ocular disease after operation. In 5% of patients, surgical management allowed for detection and treatment of clinically occult thyroid malignancies.

Pheochromocytoma and paraganglioma in children: a review of medical and surgical management at a tertiary care center

OBJECTIVE

The aim of this study was to review our institutional experience managing pheochromocytomas and paragangliomas in children.

METHODS

A retrospective chart review of the Mayo Clinic database from 1975 to 2005 identified 30 patients < 18 years of age with histologically confirmed pheochromocytoma or paraganglioma.

RESULTS

There were 12 patients with pheochromocytomas and 18 with paragangliomas. The most common presenting symptoms were hypertension (64%), palpitation (53%), headache (47%), and mass-related effects (30%). Nine patients (30%) had a genetic mutation or documented family history of pheochromocytoma or paraganglioma. Fourteen patients (47%) had malignant disease, whereas 16 (53%) had benign disease. Logistic analysis showed that statistically significant risk factors for malignancy were (1) paraganglioma, (2) apparently sporadic, as opposed to familial, pheochromocytoma or paraganglioma, and (3) tumor size of > 6 cm. Surgical resection was performed for 28 patients (93%), with perioperative mortality and major morbidity rates of 0% and 10%, respectively. Resection achieved symptomatic relief for 25 patients (83%). All patients with benign disease appeared cured after resection. For patients with malignant disease, the 5- and 10-year disease-specific survival rates were 78% and 31%, respectively, and the mean survival time was 157 +/- 32 months.

CONCLUSIONS

The incidence of malignant pheochromocytoma/paraganglioma was high in children (47%), particularly those with apparently sporadic disease, paraganglioma, and tumor diameters of > 6 cm. Patients with a known genetic mutation or familial pheochromocytoma/paraganglioma were more likely to achieve resection with negative microscopic margins and had improved disease-specific mortality rates. Surgical resection remains the treatment of choice for pheochromocytoma and paraganglioma.

Primary Hyperparathyroidism Surgical Management Since the Introduction of Minimally Invasive Parathyroidectomy

HYPOTHESIS

Minimally invasive parathyroidectomy (MIP) for primary hyperparathyroidism (HPT) has equal cure and recurrence rates as standard cervical exploration. Changes in the management of primary HPT have occurred since introducing MIP including localization, anesthesia, intraoperative parathyroid hormone monitoring, and indications for parathyroidectomy.

DESIGN

Cohort analysis of 1361 consecutive patients with primary HPT operated on at the Mayo Clinic, Rochester, Minn, from June 1998 through March 2004. Mean follow-up, 25 months.

SETTING

Tertiary referral center.

PATIENTS

One thousand three hundred sixty-one patients operated on for primary HPT, excluding 160 patients who were reoperated on.

INTERVENTION

Standard cervical exploration MIP.

MAIN OUTCOME MEASURES

Cure, recurrence, localization, anesthesia, hospitalization, intraoperative parathyroid hormone level monitoring, contraindications to MIP, surgical indications, assessment of osteoporosis and osteopenia, postoperative patient assessment of general patient health, and operative satisfaction.

RESULTS

Cure of primary HPT for both conventional exploration and MIP was 97%; only 1 patient who underwent MIP had a potential recurrence. Imaging sensitivity and positive predictive values were as follows: sestamibi scintigraphy, 86% and 93%; ultrasonography, 61% and 87%, respectively. Usage of general vs local anesthesia with intravenous sedation was 46% and 49%, respectively, in patients w ho underwent MIP; 46% were dismissed as outpatients, 49% had single-night stays. The accuracy of intraoperative parathyroid hormone level monitoring was as follows: 98% (8% had true-negative results); the frequency of multiple gland disease was 13%. Accounting for causes precluding MIP, an estimated 60% to 70% of all patients would be eligible for MIP. By preoperative assessment, 79% had osteoporosis-osteopenia; 58% with postoperative bone mineral density measurements were improved. More than 85% were satisfied with the results of their operation.

CONCLUSION

With high-quality localization and intraoperative parathyroid hormone level monitoring, MIP can be performed with equal cure rates as standard cervical exploration, with no present evidence of delayed recurrence.

Primary hyperparathyroidism in pediatric patients

OBJECTIVE

Primary hyperparathyroidism (HPT) is unusual in children. We reviewed our experience with HPT to better characterize these children.

METHODS

The retrospective review of patients <19 years old who underwent parathyroid resection for primary HPT from 1970 to 2000 was performed at a single institution..

RESULTS

Fifty-two patients were identified. Median age was 16.8 years (range: 4-18.9) with a female-to-male ratio of 3:2. Eighty-five percent had an elevated parathyroid hormone (PTH) level, and 15% had an inappropriately normal PTH level during hypercalcemia. Serum calcium was elevated in all patients except for 2 with multiple endocrine neoplasma (MEN)-IIA and 1 with familial non-MEN HPT, but both had elevated PTH levels. Alkaline phosphatase levels were significantly higher in children with documented bone involvement. At presentation 41 patients (79%) were symptomatic and end-organ damage (nephrocalcinosis, nephrolithiasis, acute pancreatitis, or bone involvement) occurred in 23 patients (44%). Thirty-four patients (65%) had a single adenoma; hyperplasia was identified in 16 patients (27%), and of these cases, 57% occurred in patients diagnosed with MEN-I. Short-term complications included transient hypocalcemia in 29 patients (56%) and transient vocal cord paralysis in 2 patients (4%). Long-term complications were significant for permanent hypocalcemia in 2 patients (4%) and no recurrent laryngeal nerve injuries. No parathyroid abnormalities were identified during exploration in 4 (8%) children. Long-term follow-up was achieved in 98% of patients for a mean and median of 13 years. Resolution of hypercalcemia was achieved in 94% of cases.

CONCLUSION

The diagnosis of primary HPT in pediatric patients is frequently delayed, is commonly symptomatic, and has significant morbidity. For children in whom HPT is suspected, evaluation of serum calcium and PTH levels is diagnostic in 100% of children. Parathyroid resection is effective at restoring normal serum calcium, has few complications, and is the treatment of choice for children with primary hyperparathyroidism.

Androgen-secreting adrenal tumors

BACKGROUND

Adrenal tumors that secrete androgens exclusively are extraordinarily rare. The aim of this study was to characterize patients with pure androgen-secreting adrenal tumors.

METHODS

A retrospective chart review from January 1946 through November 2002 identified 11 female patients with pure androgen-secreting adrenal tumors.

RESULTS

The mean age was 23.4 years (range, 1-52). The most common presenting symptoms were hirsutism, acne, and clitoral enlargement. Elevated 17-ketosteroids were found in seven of nine tested patients. Computed tomogram, ultrasound, or both localized tumors in six of seven patients. All tumors were surgically resected, one laparoscopically, all without complications. Five of the 11 tumors were malignant. Mean weight and mean maximal diameter for benign and malignant tumors were 44 g and 4.2 cm and 232 g and 9.8 cm, respectively. Mean hospital stay was 8.5 days, with excess androgen production resolved in all patients. Recurrence and disease-related death occurred in only one patient who had pulmonary metastases at diagnosis. The remaining patients had no recurrence of tumor at mean follow-up of 11.7 years (range, 0.5-32 years).

CONCLUSIONS

Pure androgen-producing tumors are extremely rare. Approximately 50% are benign, and surgical resection provides excellent treatment if the tumors are not metastatic at the time of diagnosis.