[Serrated polyps and their association with synchronous advanced colorectal neoplasia].

Introduction: Large serrated polyps (SP), proximal SP, SP with dysplasia and the presence of multiple sessile serrated adenomas/polyps (SSA/P), which we refer to as SP with increased risk of metachronous lesions (SPIRML), have been associated with an increased risk of advanced colon lesions on follow-up. It is unclear, however, whether SPIRML are also associated with an increased risk of synchronous advanced colorectal neoplasia (ACN).

Aim: The aim of this study was to estimate the prevalence of SPIRML and to evaluate the association between SPIRML and synchronous ACN.

[Ectopic retroperitoneal thyroid gland].

The presence of subdiaphragmatic thyroid tissue is a very rare finding. We reviewed the literature and found only 15 published cases. The most appropriate management of this entity has not been established, but surgical removal is common to exclude malignancy.