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Background: Hydatid cyst, a parasite disease, can involve liver more than other organs. The most serious complication of the cyst is rupture which may spread out to biliary duct, hollow organ, or abdominal cavity directly. Elective treatment is emergent surgery. Case: A 28 rural woman referring with abdominal pain, nausea and vomiting due to car accident. Abnormal findings consisted of: abdominal distention, reduction of bowel sounds, tenderness and generalized guarding and hive lesions in the anterior chest wall, upper abdomen, and both forearms. In sonography, a lot of free liquid in abdominal and pelvic cavity, and three hetroechoic masses in the right lobe of the liver were reported. Four days after abdominal surgery the patient was discharged with Albendazole order. Conclusion: Intra-abdominal rupture of hydatid cyst is the most serious that due to trauma complication and elective treatment is emergency surgery.

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Background: Spontaneous rupture of tendon is a rare disease that often occurs following an underlying disease or drug usage. However, the association of this condition with primary hyperparathyroidism has rarely been reported. Case: In a case-study, two cases of spontaneous tendon rupture associated with primary hyperparathyroidism are reviewed. The first one is a middle-aged woman that due to bilateral patellar tendon rupture is operated for secondary repair and augmentation of tendons. The second one is a middle-aged man with unilateral triceps brachii tendon rupture who has been operated for primary tendon repair. Conclusion: Since paramount force is needed for tendon rupture, in spontaneous tendon rupture cases, patient evaluation for detecting underlying diseases and drug usage is necessary. In cases that the history of an underlying disease is not indicated, evaluation of serum level concentrations of Ca, P, ALP, and PTH is recommended for contraindication of primary hyperparathyroidism.