Pulmonary metastases of uterine endometrial stromal sarcoma (ESS) are un com-mon. The patterns of uterine ESS metastasis to the lung are multiple pulmonary nodules, single nodule, or cystic lesions. Pulmonary intraalveolar micronodular metastases of uterine ESS are unusual and have not been reported. We experienced a case of metastatic uterine ESS presenting as pulmonary diffuse micronodules with ground glass opacities on chest computed tomography of a 37-yr-old woman who previously underwent hysterectomy due to low grade ESS of the uterus four years ago. The histologic findings of video assisted thoracotomy biopsy showed numerous intraalveolar polypoid micronodules protruding from the alveolar septums. All tumor nodules were composed of short spindle cells arranged in ill-defined whorls, and nuclear feature and sparse cytoplasm were seen in uterine ESS. Immunohistochemically, these cells showed strong nuclear staining for estrogen receptor and progesterone receptor, and diffuse cytoplasmic staining for CD10.
Adult ; Endometrial Neoplasms/*pathology/radiography ; Female ; Humans ; Lung Neoplasms/*pathology/radiography/*secondary ; Sarcoma, Endometrial Stromal/*pathology/radiography/*secondary

This report describes the gross, histological, and immunohistochemical features of medullary thyroid carcinoma (MTC) with pulmonary metastases in a young dog. Sheets of pleomorphic cells supported by fibrous stroma characterized the primary mass, while metastatic nodules had a neuroendocrine pattern. Despite differing histologic features, all masses showed marked immunoreactivity against calcitonin and multiple neuroendocrine markers consistent with MTC. Although MTC is a well-recognized entity, it may be difficult to distinguish this mass from other thyroid neoplasms, necessitating immunohistochemical characterization.
Animals ; Carcinoma, Neuroendocrine/pathology/radiography/*veterinary ; Dog Diseases/*pathology/radiography ; Dogs ; Female ; Laryngeal Neoplasms/secondary/veterinary ; Lung Neoplasms/secondary/veterinary ; Neoplasm Metastasis ; Thyroid Neoplasms/pathology/radiography/*veterinary

Paraganglioma is a rare neuroendocrine tumor arising from the undifferentiated cells of the primitive neural crest. We report a case of malignant paraganglioma originating from the left kidney. The 55-year-old female patient was admitted for intractable cough for a month and the presence of a solid mass in the left lung detected by computer tomography (CT). Sonography revealed a mass in the left kidney after admission. Complete surgical resection of the tumor was performed and the diagnosis of malignant paraganglioma originating from the left kidney was established pathologically. During the follow-up for 12 months, the patient showed a good general condition and sonography revealed no evidence of recurrence. Based on these findings, we discussed the diagnosis of this disease using medical imaging modalities.
Female ; Humans ; Kidney Neoplasms ; diagnostic imaging ; pathology ; surgery ; Lung Neoplasms ; diagnostic imaging ; secondary ; Middle Aged ; Paraganglioma ; pathology ; secondary ; surgery ; Radiography

The spontaneous regression of metastatic lesions from renal cell carcinoma (RCC) is extremely rare, but may be encountered following cytoreductive treatments. We report a case of a recurrent RCC with multiple metastatic lesions which spontaneously regressed after undergoing radiofrequency ablation of the renal tumor.
Adrenal Gland Neoplasms/radiography/*secondary ; Aged, 80 and over ; Carcinoma, Renal Cell/radiography/*secondary/*surgery ; *Catheter Ablation ; Humans ; Kidney Neoplasms/*pathology/radiography/*surgery ; Lung Neoplasms/radiography/*secondary ; Male ; Neoplasm Recurrence, Local ; Remission, Spontaneous ; Tomography, X-Ray Computed

The radiological appearance of diffuse discrete pulmonary nodules associated with cryptogenic organizing pneumonia (COP) has been rarely described. We describe a case of COP in 49-year-old woman with acute myeloid leukemia who developed diffuse pulmonary nodules during the second course of induction chemotherapy. The clinical status of the patient and imaging findings suggested the presence of a pulmonary metastasis or infectious disease. A video-assisted thoracoscopic lung biopsy resulted in the unexpected diagnosis of COP as an isolated entity. Steroid therapy led to dramatic improvement of the clinical symptoms and the pulmonary lesions.
Cryptogenic Organizing Pneumonia/complications/*radiography ; Diagnosis, Differential ; Female ; Humans ; Leukemia, Myeloid, Acute/*complications/pathology ; Lung/*radiography ; Lung Neoplasms/radiography/secondary ; Middle Aged ; Multiple Pulmonary Nodules/complications/*radiography

OBJECTIVE: We wanted to evaluate the usefulness of the computer-aided detection (CAD) system for detecting pulmonary nodules in real clinical practice by using the CT images. MATERIALS AND METHODS: Our Institutional Review Board approved our retrospective study with a waiver of informed consent. This study included 166 CT examinations that were performed for the evaluation of pulmonary metastasis in 166 patients with colorectal cancer. All the CT examinations were interpreted by radiologists and they were also evaluated by the CAD system. All the nodules detected by the CAD system were evaluated with regard to whether or not they were true nodules, and they were classified into micronodules (MN, diameter < 4 mm) and significant nodules (SN, 4 < or = diameter < or = 10 mm). The radiologic reports and CAD results were compared. RESULTS: The CAD system helped detect 426 nodules; 115 (27%) of the 426 nodules were classified as true nodules and 35 (30%) of the 115 nodules were SNs, and 83 (72%) of the 115 were not mentioned in the radiologists' reports and three (4%) of the 83 nodules were non-calcified SNs. One of three non-calcified SNs was confirmed as a metastatic nodule. According to the radiologists' reports, 60 true nodules were detected, and 28 of the 60 were not detected by the CAD system. CONCLUSION: Although the CAD system missed many SNs that are detected by radiologists, it helps detect additional nodules that are missed by the radiologists in real clinical practice. Therefore, the CAD system can be useful to support a radiologist's detection performance.
Colorectal Neoplasms/*pathology ; *Diagnosis, Computer-Assisted ; Female ; Humans ; Lung Neoplasms/*radiography/secondary ; Male ; Middle Aged ; Retrospective Studies ; Solitary Pulmonary Nodule/*radiography/secondary ; *Tomography, X-Ray Computed

Subungual metastasis resulting from internal malignancies is an extremely rare event. A few cases of subungual metastasis from lung cancer have been reported. However, subungual metastasis arising from lung cancer without any other form of distant metastases has not been reported. The misdiagnosis of a solitary subungual metastases as a benign inflammatory lesion is an important problem as it may cause the misdiagnosis of a lower stage of lung cancer. We may be reporting the first case of a subungual metastasis from lung cancer without any other distant metastases.
Carcinoma, Squamous Cell/secondary* ; Carcinoma, Squamous Cell/radiography ; Carcinoma, Squamous Cell/pathology ; Case Report ; Human ; Lung Neoplasms/radiography ; Lung Neoplasms/pathology* ; Male ; Middle Age ; Nails*/pathology ; Radiography, Thoracic ; Skin Neoplasms/secondary* ; Skin Neoplasms/pathology ; Tomography, X-Ray Computed

Patellar metastases are very rare. There have been approximately 20 cases reported in the literature. We have also noted two other reports of patellar metastasis from lung carcinoma as the first manifestation of lung cancer in our literature review. We present a case of patellar metastasis as the first manifestation of lung epidermoid carcinoma in a patient who was a smoker for 33 years.
Arthrography ; Bone Neoplasms/secondary* ; Bone Neoplasms/radiography ; Bone Neoplasms/pathology ; Carcinoma, Squamous Cell/secondary* ; Carcinoma, Squamous Cell/radiography ; Carcinoma, Squamous Cell/pathology ; Case Report ; Human ; Lung Neoplasms/radiography* ; Male ; Middle Age ; Patella* ; Radiography, Thoracic ; Tomography, X-Ray Computed

OBJECTIVE: We wanted to describe the retrospective CT features of subtle pleural metastasis without large effusion that would suggest inoperable lung cancer. MATERIALS AND METHODS: We enrolled 14 patients who had open thoracotomy attempted for lung cancer, but they were proven to be inoperable due to pleural metastasis. Our study also included 20 control patients who were proven as having no pleural metastasis. We retrospectively evaluated the nodularity and thickening of the pleura and the associated pleural effusion on the preoperative chest CT scans. We reviewed the histologic cancer types, the size, shape and location of the lung cancer and the associated mediastinal lymphadenopathy. RESULTS: Subtle pleural nodularity or focal thickening was noted in seven patients (50%) having pleural metastasis and also in three patients (15%) of control group who were without pleural metastasis. More than one of the pleural changes such as subtle pleural nodularity, focal thickening or effusion was identified in eight (57%) patients having pleural metastasis and also in three patients (15%) of the control group, and these findings were significantly less frequent in the control group patients than for the patients with pleural metastasis (p = 0.02). The histologic types of primary lung cancer in patients with pleural metastasis revealed as adenocarcinoma in 10 patients (71%) and squamous cell carcinoma in four patients (29%). The location, size and shape of the primary lung cancer and the associated mediastinal lymphadenopathy showed no significant correlation with pleural metastasis. CONCLUSION: If any subtle pleural nodularity or thickening is found on preoperative chest CT scans of patients with lung cancer, the possibility of pleural metastasis should be considered.
Adenocarcinoma/radiography/secondary ; Adult ; Aged ; Carcinoma, Squamous Cell/radiography/secondary ; Female ; Humans ; Lung Neoplasms/*pathology ; Male ; Middle Aged ; Pleural Effusion, Malignant/pathology ; Pleural Neoplasms/*radiography/*secondary ; Preoperative Care ; Retrospective Studies ; *Tomography, X-Ray Computed

Acute pancreatitis in cancer patients can be secondary to the malignant process itself or a complication of antineoplastic agent administration. However, acute pancreatitis caused by metastatic carcinoma of the pancreas is an uncommon condition with a poor prognosis. We report a case of a 63-year-old man with small cell carcinoma of the lung, who developed acute pancreatitis lately. Thirteen months earlier, he developed small cell carcinoma of the lung and received 6 cycles of chemotherapy. Abdominal CT scan showed swelling of the pancreas with multiple masses. The patient was managed conservatively and pancreatitis subsided. This case indicates that metastasis induced acute pancreatitis can be a manifestation of lung cancer, especially in small cell carcinoma.
Carcinoma, Small Cell/secondary* ; Carcinoma, Small Cell/radiography ; Carcinoma, Small Cell/pathology ; Case Report ; Human ; Lung Neoplasms/radiography ; Lung Neoplasms/pathology* ; Male ; Middle Age ; Pancreatic Neoplasms/secondary* ; Pancreatitis/radiography ; Pancreatitis/pathology* ; Tomography, X-Ray Computed