Fakhry Mahmoud Ebouda

The calcaneal tendon, commonly known as the Achilles tendon, is the strongest and largest tendon of the human body. It is also one of the commonest tendons to become injured due to its high biomechanical load but poor vascularity 2. The calcaneal tendon forms by the merging of fibers of the gastrocnemius and the soleus muscles, forming the tendon that inserts into the posterosuperior aspect of the calcaneus.

Omental torsion is defined as a twist of the omentum along its long axis with consequent impeding of its vascularity that may mimic acute abdomen 1. Omental torsion is a rare cause of acute abdominal pain that occurs in the third to fifth decade of life with slight male predominance 2. Sudden right lower quadrant or right paraumbilical abdominal pain that mimics acute appendicitis. The pain is persistent and non-radiating with increasing severity. Nausea and vomiting may also be a feature.

Cerebral hydatid disease (neurohydatidosis) is caused by Echinococcus granulosus or less commonly E. alveolaris or E. multilocularis. The larval stage is the cause of hydatid disease in humans 1. For a general discussion, and for links to other system specific manifestations, please refer to the article on hydatid disease. Cerebral hydatid disease is a rare parasitic infestation and accounts for 1-2 % of all cystic echinococcosis.