Breast metastasis from uterine leiomyosarcoma diagnosed by fine needle aspiration: a case report.
BACKGROUND
Leiomyosarcomas of the breast are a rare subgroup of primary breast sarcomas. Even more rare is breast metastasis of an extramammary leiomyosarcoma. To date, only 4 cases have been reported in the literature.


METHODS
We report a case of breast metastatic leiomyosarcoma in a 58-year-old woman with a prior history of uterine leiomyosarcoma, resected 18 months earlier. The breast mass was palpable and a fine needle aspiration (FNA) was performed. The microscopic examination showed cellular smears composed of loosely structured clusters and tissue fragments of spindle-shaped and polygonal or rounded malignant cells in disorderly arrangement. The tumor cells were medium- or large-sized, with basophilic cytoplasm and enlarged, irregular, hyperchromatic nuclei with nucleoli. Tumor giant cells and multinucleation were also present. The morphologic features along with immunocytochemical positivity for desmin, muscle-specific actin and vimentin indicated the diagnosis of a metastatic leiomyosarcoma.


CONCLUSIONS
FNA cytology can be a reliable method for the diagnosis of leiomyosarcoma. The morphologic criteria in combination Swith the clinical history and the immunocytochemical findings can indicate a definitive diagnosis and avoid additional painful and time-consuming diagnostic procedures for the appropriate patient's further clinical management.
Pappa
Lina
L
Department of Cytopathology, University Hospital of Ioannina, Greece.
Zagorianakou
Nektaria
N
Kitsiou
Evangelia
E
Sintou-Mantela
Evdoxia
E
Bafa
Maria
M
Malamnou-Mitsi
Vassiliki
V
D044963:Biopsy, Fine-Needle; D001943:Breast Neoplasms / Q000556:secondary*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007890:Leiomyosarcoma / Q000556:secondary*; D008875:Middle Aged; D014594:Uterine Neoplasms / Q000473:pathology*