Table 1.

Stain intensity and evidence of SCNC of the breast markers in tissue samples

	Intensity
Stain
Syp	++
CD56	+
Breast markers
ER	−
PR	+
Her-2	+

Notes: Thin slices of tumor tissue for all cases received in our histopathology unit were fixed in 4% formaldehyde solution (pH 7.0) for periods not exceeding 24 hours. The tissues were processed routinely for paraffin embedding, and 4 μm-thick sections were cut and placed on glass slides coated with (3-Aminopropyl) triethoxysilane for immunohistochemistry. Tissue samples were stained with hematoxylin and eosin to determine the histological type and tumor grade.

Abbreviations: SMCC, small-cell carcinoma; ER, estrogen receptor; PR, progesterone receptor; Syp, synaptophysin; CD56, cluster of differentiation 56.