[Endogenous strangulation caused by fibromatosis colli]

The case report is presented of fatal endogenous strangulation of a seven week-old male infant due to a fibrous sternomastoid tumour. Postmortem examination showed severe congestion of the cerebral veins and conjunctiva with ecchymoses just like after use of concentric force against cervical viscera. On the basis of the results of the histological examination, the possible influence of birth trauma on the aetiology of this type of fibromatosis is discussed.