Primary yolk sac tumor in the abdominal wall in a 20-year-old woman: A case report

Figure 1 Histological findings from the resected tumor specimen showed at low power magnification. A: Histological findings from the resected tumor specimen showed papillary morphology areas at low power magnification; B: Classic micro vesicular and cystically areas at low power magnification; C: A solid trabecular areas at low power magnification. Original magnification × 100 (Hematoxylin & eosin).

Figure 2 Histological findings from the resected tumor specimen showed at high power magnification. A: Characteristic Schiller-Duval bodies; B: Loose reticular structure; C: Papillary structure; D: Solid structure; E: Mucoid structure; F: Eosinophilic globules or hyaline bodies. Original magnification × 200 (Hematoxylin & eosin).

Figure 3 Immunostaining of tumor cells. Immunostaining showed that broad-spectrum creatine kinase and glypican-3 were strongly positive in almost all the neoplastic cells; Spalt-like transcription factor 4 was strongly positive in the nuclei of the neoplastic cells; alpha-fetoprotein was negative in the neoplastic cells. Original magnification × 200 (Immunohistochemical). CK: Creatine kinase; SALL4: Spalt-like transcription factor 4; AFP: Alpha-fetoprotein.