case_images: PMC11295218_01
case_images: Computed tomography head and neck showing a large retropharyngeal mass at the level of C1-C6: (A) axial view, (B) coronal view, and (C) sagittal view.
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case_images: PMC11295218_01_10.1177_23247096241262515-fig1.jpg
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case_images: Computed tomography (CT) chest revealed a large retropharyngeal mass at the level of C1-C6, right upper lobe pulmonary nodules, and right hilar lymphadenopathy concerning for malignancy (Figure 1).
case_images: (A) Biopsy of right cervical lymph node showing metastatic poorly differentiated carcinoma (20x original magnification), (B) fine needle aspiration of subcarinal lymph node showing metastatic carcinoma with squamous differentiation (10x original magnification), (C) pancytokeratin stain of right cervical lymph node, and (D) CK7 stain of right cervical lymph node (Images courtesy of Pramila Moideen, MD, Medical College of Georgia Department of Pathology).
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case_images: Fine needle aspiration of cervical and subcarinal lymph nodes revealed poorly differentiated metastatic carcinoma (Figure 2).
case_images: (A) Biopsy of kidney demonstrating segmental sclerosis, (B) biopsy image demonstrating crescent, (C) tubular injury, (D) immunofluorescence pattern demonstrating IgA nephropathy, and (E) red blood cell casts.
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case_images: In addition, 8 of the intact glomeruli demonstrated cellular/fibrocellular crescent formation (Figure 3).