False about Peutz-jegher's syndrome is

PEUTZ-JEGHER’S POLYP It is common in small intestine (jejunum) but can also occur in large intestine.   Features are multiple, familial, hamartomatous intestinal polyps.   Asssociated with melaenosis of the oral mucosa, lips  (lower lip) and occasionally digits (not in tongue).  Microscopically it contains tree like branching filaments of mucosa with smooth muscle wall.  It can occasionally turn into malignancy