This section is from the book "Applied Anatomy: The Construction Of The Human Body", by Gwilym G. Davis. Also available from Amazon: Applied anatomy: The construction of the human body.
Large effusions into the sheath of the flexor tendons of the wrist, usually purulent or tuberculous in character, sometimes cause two swellings, one in the palm of the hand and the other above the wrist. These communicate beneath the anterior annular ligament and form what is called a compound ganglion (Fig. 352).
Fig. 352. - Compound ganglion showing swellings above and below the anterior annular ligament. (From author s sketch of a tuberculous case).