“The toll for crossing the isthmus could easily be a week's salary for a campesino.”

“The best way to cross the isthmus by land is to ride the historic Panama Canal Railway from Panama City to Colon.”

“The cervix forms the lower third, connected by a narrow isthmus to the main muscular body of the uterus.”

“If the toxic adenoma is in the thyroid isthmus, an ipsilateral thyroid lobectomy or isthmectomy should be performed.”

“In most cases, lobectomy and isthmectomy were performed with intraoperative frozen-section evaluation.”

“In December 1997, the patient underwent a bilateral parathyroid exploration and a right thyroid lobectomy and isthmectomy.”

“The EndoVac system removed considerably more debris from narrow isthmi in mandibular mesial roots.”

“A contradictory picture has developed within a limited number of brain studies in fish that have examined the connections between Nucleus Isthmi and the Optic Tectum.”

“All three of these isthmuses are bisected by canals to facilitate shipping.”

“Unquestionably the two most famous isthmuses are the Isthmus of Panama, connecting North and South America, and the Isthmus of Suez, connecting Africa and Asia.”

“Both these isthmuses are very narrow compared to the bulk off the landmasses they unite.”