Torticollis is a common presenting feature of FOP (in about 80%), the head is tilted to one side and there are painful swelling in the region of the sternocleidomastoid muscle.

Flexion of the neck is limited when the ligamentum nuchae ( a ligament that extends from the skull to the seventh cervical vertebrae) is involved.

The mobility of the temporomandibular joint can be diminished when the masseter muscle is involved.

Last modified
28 December 2018

Limited movement of the neck may be due to block vertebrae may be a feature of or occurs as a wry neck, or torticollis is a (painfully) twisted...

Rare Condition

Fibrodysplasia Ossificans Progressiva

Fibrodysplasia Ossificans Progressiva is a rare genetic disorder in which connective tissue and muscle tissue are gradually ossified. Extra-skeletal bone formation causes progressive loss of...


Torticollis (wry neck, or loxia) is disorders that exhibit flexion...