Sinistral Limnaea peregra

Analysis of follicle cell patterns in dextral and sinistral Limnaea peregra.

Sinistral portal hypertension

Sinistral, or left-sided, portal hypertension is a rare cause of upper gastrointestinal haemorrhage. There are many causes of sinistral portal hypertension. The primary pathology usually arises in the pancreas and results in compression of the pancreatic vein. This compression causes backpressure in the left portal venous system and subsequent gastric varices. Management is usually surgical to ...

Inheritance of Direction of Coilling in Limnaea.

Sinistral Snails and Gentlemen Scientists

A single gene mutation can cause a complete left-to-right and right-to-left inversion of the body axis. This mutation exemplifies a large class of so-called maternal effect genes that regulate key events during early development. This principle was first established nearly one hundred years ago, principally by the work of amateur naturalists.

Pharyngeal Varices Secondary to Sinistral Portal Hypertension

A 60-year-old man presented with hematemesis. He had been diagnosed with pancreatic tail cancer and gastric varices due to sinistral portal hypertension, which had been observed on computed tomography (CT). An upper gastrointestinal endoscopy was undertaken to assess the gastric varices, and a recent gastric variceal bleed was suggested (Figure 1). Although splenectomy was a definitive therapy,...