Alveolar adenoma is a rare lung benign tumour originating from type II pneumocytes. It presents as a well-defined nodule. In some cases, it is difficult to differentiate from lung cancer. Few cases of this tumour have been reported. We describe here a case of alveolar adenoma in a 63-year-old man discovered incidentally on chest X-ray. The lesion was reported as lepidic adenocarcinoma in bronchoscopic biopsy. The patient underwent a thoracoscopic left lower lobectomy. The histopathological and immunohistochemical examinations resulted in a diagnosis of alveolar adenoma. We report this case to describe its morphological and immunohistochemical characteristics and to emphasize its diagnostic difficulties.
Atypical spindle cell/pleomorphic lipomatous tumor (ASCPT) constitutes an emerging entity of lipomatous tumors. It is a benign tumor. It occurs typically in limbs and limb girdles. The occurrence in oral cavity is unusual. The diagnosis of this neoplasm is challenging. Herein, we report a case of ASCPT arising in the tongue.
Rosai–Dorfman–Destombes disease (RDD) is a rare histiocytic disorder affecting lymph nodes as well as extranodal sites. Although cutaneous involvement in RDD is common, primary cutaneous RDD is a distinct and not well‐documented entity with unknown aetiology and non‐specific clinicopathological features. We report a case of a 57‐year‐old patient, who presented with an indolent skin nodule in the left sub‐nipple area. Surgical excision was performed. Histological examination concluded to the diagnosis of cutaneous RDD with histological features mimicking IgG4‐related disease. The diagnosis of systemic RDD with cutaneous involvement was ruled out after exclusion of extracutaneous involvement. No recurrence or systemic progression was observed during follow‐up. The diagnosis of primary cutaneous RDD is very uncommon and hence is challenging for pathologist and dermatologist especially with features of IgG4‐related disease. Careful systemic and microscopic examinations help in establishing the appropriate diagnosis.
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