A 17‐year‐old young man presented with a 2‐week history of an asymptomatic widespread eruption affecting the trunk and arms. On physical examination we observed multiple, oval purpuric macules and papules, 1–3 cm in diameter, distributed in a “christmas tree” pattern on the trunk and arms (Figs 1 and 2). There was no sign of a herald patch and mucosal examination was normal. 1 Lesions distributed in christmas tree pattern on the trunk 2 Purpuric macules and papules on the arm Laboratory tests including complete blood cell count, erythrocyte sedimentation rate, prothrombin time, partial thromboplastin time, biochemical and urinary analysis were all within normal limits. A biopsy specimen from a lesion of the left arm revealed superficial perivascular lymphohistiocytic infiltrate and erythrocyte extravasation, dermal edema, spongiosis and hypogranulosis (Fig. 3). 3 Histologic examination from the left arm. Superficial perivascular lymphohistiocytic infiltrate, erythrocyte extravasation and spongiosis. (hematoxylin and eosin, × 400) A diagnosis of purpuric pityriasis rosea was made based on clinical and histopathological findings. It was suggested the patient minimize sweating and bathing and follow‐up without treatment. One month later the eruption cleared spontaneously without recurrence.
Fig 1. Well-demarcated tumor mass enclosed by intact mucosa (hematoxylin and eosin stain, original magnification xSO). Schwannomas are uncommon neurogenic tumors, usually solitary, that arise from cells of the neural sheath. The tumors have been reported along most cranial nerves, the sympathetic chain, and brachial plexus. Schwannoma is the most common benign tumor of the pharynx," but schwannoma of the tonsil is an extremely rare tumor. To our knowledge, only 2 cases of a tonsillar schwannoma have been documented, in an adult and a child.t-' Schwannoma occurs equally in both genders, and no causative factors have been identified. Age at onset has ranged from 1 to 89 years, with the majority presenting in the fourth decade of life." Macroscopically, schwannomas are typically circumscribed and encapsulated. They may show cystic degeneration. Histologically, 2 distinct patterns can be seen: known as Antoni type A and type B. Antoni type A tissues are characterized by compact Schwann cells with nuclear palisading, whereas Antoni B tissues exhibit a considerable degree of cell pleomorphism in a loosely arranged reticulum network. Vascularity is not a prominent feature, and necrosis and mitotic activity are seldom encountered. As the schwannoma ages, degenerative changes take place, characterized by hyalinized tissue, myxoid areas, and large 693
No abstract
Renal inflammatory pseudotumor is a very rare benign condition of unknown etiology characterized by proliferative myofibroblasts, fibroblasts, histiocytes, and plasma cells. We report a case of inflammatory pseudotumor of the kidney. A 42-year-old female was admitted with the complaint of right flank pain. Computerized tomography revealed a tumor, 7 cm in diameter, in the upper pole of the right kidney. Right radical nephrectomy was performed under the diagnosis of renal cell carcinoma. Histological examination demonstrated a tumor composed of spindle-shaped fibroblastic cells infiltrated by variable numbers of plasma cells, small lymphocytes and histiocytes. The pathologic diagnosis was renal inflammotory pseudotumor.
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