case_images: PMC10835274_01
case_images: Chemotherapy and targeted therapy for advanced lung adenocarcinoma.
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case_images: Thus, the therapy regimen was modified to include abraxane and bevacizumab (The course of chemotherapy and targeted therapy after recurrence is shown in  Figure 1 ).
case_images: Computed tomography (CT) of the epigastric region showing a pancreatic mass with indeterminate nature is depicted in (A) arterial phase, (B) venous phase, and (C) delayed phase. (D) An enhanced CT image of the epigastric region taken during the patient's initial episode of pancreatitis.
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case_images: During hospitalization for chemotherapy, an enhanced CT scan of the upper abdomen showed patchy low-density shadows in the head of the pancreas, measuring approximately 19 mm x 17 mm ( Figure 2 ). One month later, the patient underwent a CT scan due to abdominal pain, which revealed patchy low-density shadows in the pancreatic head area with indistinct borders ( Figure 2 ).
case_images: Magnetic resonance imaging findings. (A) Initial magnetic resonance imaging on admission revealed two masses in the neck and leptomeninges of the pancreas, respectively, along with an encapsulated exudate in the head of the pancreas. (B) Follow-up magnetic resonance imaging after 3 cycles of chemotherapy demonstrated a reduction in the size of the pancreatic masses.
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case_images: Figure 3 ). Furthermore, an ultrasound-guided gastroscopy was performed for cytopathology examination, revealing a small cell carcinoma lesion in the pancreatic head that tested positive for CK, CD56, Ki67, Syn, and TTF-1 ( Figure 4 ). Following three cycles of chemotherapy, MRI findings indicated a reduction in the size of the pancreatic lesions ( Figure 3 ), and her treatment response was evaluated as stable disease (SD) according to the Response Evaluation Criteria in Solid Tumors (RECIST) scoring criteria.
case_images: Histological images of the pancreatic tumor showing small cell carcinoma in the pancreas (hematoxylin and eosin staining (HE), x200 magnification). The small cell carcinoma was positive with immunostaining for CK, Syn, CD56, TTF-1 and Ki67 (200X): (A) was HE staining of the specimen, (B) was immunohistochemical staining with CK, (C) was immunohistochemical staining with Syn, (D) was immunohistochemical staining with CD56, (E) was immunohistochemical staining with TTF-1, and (F) was immunohistochemical staining with Ki67.
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case_images: Figure 3 ). Furthermore, an ultrasound-guided gastroscopy was performed for cytopathology examination, revealing a small cell carcinoma lesion in the pancreatic head that tested positive for CK, CD56, Ki67, Syn, and TTF-1 ( Figure 4 ).