Pneumothorax revealing late recurrence of infantile myofibromatosis.

Adult recurrence of infantile myofibromatosis is exceptional. Here, we report the case of a 23-year-old woman with a late recurrence of infantile myofibromatosis revealed by spontaneous pneumothorax. The chest computed tomography scan found both cavitary and nodular bilateral pulmonary lesions. In infancy, she had multicentric myofibromatosis with digestive, cutaneous, and bone involvement, spontaneously regressive before the age of 15 months. Histological analysis of lung samples showed identical findings as from the cutaneous biopsy performed in infancy, confirming the recurrence of infantile myofibromatosis as pulmonary metastasis. New biopsy and long-term follow-up are highly recommended in the management of such cases.