Tatsushi Shiomi

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BACKGROUND Stromal cells are believed to affect cancer invasion and metastasis. The purpose of this study was to evaluate the distribution of cancer-associated fibroblasts (CAFs) and the incidence of tumor-associated macrophages (TAMs) in oral squamous cell carcinoma (OSCC), focusing on clinicopathological factors and patient prognosis, as well as cancer(More)
Basal cell adenoma (BCA) is an uncommon benign salivary gland neoplasm that includes isomorphic basaloid cells. We report on a female patient with BCA that developed in the right parotid gland in her 50s. The present patient demonstrated a few tumor nests in the fibrous capsule, and her tumor was larger than usual. These facts made us suspect of malignancy.(More)
Pigmented squamous cell carcinoma is a rare variant of squamous cell carcinoma. We report a case of pigmented squamous cell carcinoma with dermoscopic examination probably arisen from actinic keratosis in a 101-year-old woman who was surgically treated under general anesthesia. In addition, we discuss indications of general anesthesia in elderly patients(More)
BACKGROUND Extramammary Paget's disease (EMPD) is a distinct form of malignant skin neoplasm. Invasive EMPD is relatively rare and its detailed histopathological features have not been investigated to date. METHODS Surgical specimens were obtained from 51 patients with primary invasive EMPD. Clinical data including lymph node status were retrieved from(More)
A subcutaneous myopericytoma-type perivascular myoma arising in the elbow of a 61-year-old woman is described. The tumor was well demarcated and consisted microscopically of small ovoid and spindle cells arranged in a concentric fashion, surrounding small to medium-sized vessels and imparting a superficial resemblance to hemangiopericytoma. In some areas,(More)
BACKGROUND Mycobacterial spindle cell pseudotumor is a rare tumor-like lesion characterized by the proliferation of spindle cells engorged with mycobacterial microorganisms. To our knowledge, only a few cases of cutaneous lesions have been described in the literature. CASE REPORT A 58-year-old Japanese woman presented with a nodule in her left forearm.(More)
Mycosis fungoides (MF) represents the most common type of cutaneous lymphoma. MF shows varieties in both its clinical presentation and immunophenotype. We herein report one case of poikilodermatous MF with a CD8+ CD56+ immunophenotype and present a literature review. A 20-year-old Japanese woman presented with a 10-year history of multiple poikilodermatous(More)
Acquired reactive perforating collagenosis has been reported in association with various conditions. To the authors' knowledge there has been no report of a patient with Mikulicz's disease showing acquired reactive perforating collagenosis. A 61-year-old Japanese man presented with non-pruritic multiple umbilicated papules with central keratotic and crusted(More)
Cutaneous epithelioid angiomatous nodule (CEAN) represents a rare, benign vascular lesion described by Brenn and Fletcher in 2004. To the best of our knowledge, the development of CEAN in a pre-existing vascular malformation has not been previously reported. A 52-year-old Japanese woman presented with multiple erythematous papules developed on violaceous(More)