through a bilateral subcostal incision. Pathology revealed Case report a 4.5×3.5×3 cm tumour involving the upper portion of the right kidney; the histological interpretation was A 62-year-old man in poor general condition was admitted with a cough and haematochezia. ClinicalFuhrman grade 2 adenocarcinoma of the kidney with associated metastatic lung cancer (Fig. 2a). Neuronexamination revealed a left abdominal mass which was tender, hard and fixed. A chest X-ray showed a specific enolase (NSE) stained positively and was consistent with the diagnosis of a SCC (Fig. 2b). The surgical 3.5×7 cm mass in the region of the right hilus, an obliteration of the cardiac border at the right lower lobe specimen of the left perirenal mass was 10×5×3 cm; the histological interpretation was SCC with neuroand pleural eCusion. Chest CT revealed the primary lung malignancy in the right lower lobe with displacement and occlusion of segmental bronchi, and lymphadenopathies in the right hilum, subcarina and anterior mediastinum. Bronchoscopy-guided fine-needle biopsies of the lung mass showed a small cell carcinoma (SCC). Abdominal CT revealed a right renal and left perirenal mass. The left perirenal mass displaced the kidney anteriorly and medially, but did not invade the renal parenchyma (Fig. 1). CT-guided fine-needle biopsies of the left perirenal mass showed a metastasis from lung cancer. The preoperative diagnosis was lung cancer metastasizing to the ipsilateral kidney and contralateral perirenal space, or right RCC and lung cancer metastasizing to the contralateral perirenal space. The left perirenal mass was excised and the right renal mass enucleated a b Fig. 2. a, The small cell carcinoma (left portion, small cells, dark stained and disorganized) contrasts vividly with well-diCerentiated

The paranasal sinuses are a rare site for neuroendocrine carcinoma (NEC). In contrast to the other regions, NEC of the sinuses has been reported to be recurrent and locally destructive. We report a case of NEC of the ethmoid sinuses. The patient was a 16-year-old Indian boy and was treated with radiation therapy to 6500 rad. He has been disease free for the past 5 years. All the cases reported to date were also reviewed.

Merkel cell carcinoma (MCC) is a rare malignant cutaneous tumor primarily located in the head and neck. We report the imaging features of pathologically confirmed MCC in the trunk. On US, MCC showed heterogeneous echogenicity with perpendicular hypoechoic linear bands that resembled “columns of smoke” in the skin and subcutaneous layers as well as prominent vascularity. On MRI, the tumor showed hypointensity on T1-weighted images and hyperintensity on proton density and T2-weighted images with linear low-signal bands in the skin and subcutaneous layers as well as intense enhancement on T1-enhanced images. Although MCC has nonspecific imaging features, these characteristics may be helpful for the early diagnosis of this disease.