경부 섬유종증

초록

Fibromatosis coli has long been recognized as a peculiar benign fibrous growth of the sternocleidomastoid muscle that uaually appears during the first week of life, in 0.4% newborns, often associated with muscular torticollis. The lesion is in most cases self limiting and never behave aggressively. On clinical examination, it can be difficult to recognize and as a consequence may be the target for fine needle aspiration(FNA) biopsy. The typical findings of aspirates are sleder spindle-shaped fibroblasts without atypia, degenerated striated muscle fiber, and stromal collagen. We experienced a case of fibromatosis coli which were diagnosed by FNA cytology. The patient was one month-old male neonate suffered from a right neck mass which was incidentally found. He was born in normal spontanous delivery at full term. MRI and CT scan revealed a 2.5cm sized ill-defined lobulated soft tissue mass at right posterio neck. UNder the clinical impression of malignant tumor, fine needle aspiration was performed from the neck mass. Cytologic finding showed scatterd bland-looking fibroblastic cells and degenerated atrophic mucscle fibers. This cytologic finding is highly suggestive of fibromatosis coli, which was confirmed by histologic examination.