Solitary fibrous tumor (SFT) is a rare spindle cell neoplasm that usually arises in the pleura and has been recently reported from unusual locations. We present a case of SFT that occurred in the scrotum. The patient was a 38-year-old man who presented with a painless, left, scrotal mass of five years' duration. Scrotal sonography and pelvic CT scan showed a soft-tissue mass of 11 cm in diameter. The resected tumor measured 11 8 7 cm and was well demarcated from the surrounding soft tissue. The cut surface revealed homogenously grayish-white and gelatinous appearance. No hemorrhage or necrosis was found. Microscopically, the tumor showed hypercellular spindle cell areas intermixed with hypocellular areas lying in a myxoid or collagenous stroma. The spindle cells had no mitosis or low mitotic figures, and little or no nuclear atypia. They exhibited a variety of growth patterns, including "patternless" pattern, and a prominent vasculature with hemangiopericytic pattern. Vimentin, CD34, and bcl-2 protein immunoreactivity were observed. Characteristic histologic and immunohistochemical features of this lesion were consistent with SFT. To arrive at a correct diagnosis of this lesion, especially when it occurs in unusual sites, immunohistochemical study including CD34 & bcl-2 protein is required in addition to characteristic histologic features.
Adult ; Collagen ; Deception ; Diagnosis ; Gelatin ; Hemangiopericytoma ; Hemorrhage ; Humans ; Mitosis ; Necrosis ; Pleura ; Scrotum* ; Solitary Fibrous Tumors* ; Tomography, X-Ray Computed ; Vimentin

Two unusual cases of metastasis of carcinoma to carcinoma are reported. The initial malignancies, an adenocarcinoma of the rectum and a duct carcinoma of the breast, were found to have metastasis to a clear cell carcinoma of the kidney. The various theories on the peculiar tendency for the renal cell carcinoma to be the most common host tumor for other primary carcinoma are commented upon briefly.
Adenocarcinoma ; Neoplasm Metastasis

There have been some controversies on prognostic significance of lymph node (LN) micrometastasis (MM) in advanced gastric carcinomas (AGCs). The present study aimed at 1) determination of prognostic significance of MM, 2) evaluation of the relationship between MM and clinicopathological parameters, and 3) determination of LN group where MMs were frequently found. We studied 70 cases of AGC without LN metastasis on initial examination. The tumors were examined for location, size, depth of invasion, differentiation, histologic type, lymphatic invasion, and c-erbB-2 expression. To evaluate MM, pancytokeratin immunohistochemistry was performed in all LNs from 70 cases of AGCs. Among 2,203 dissected LNs from 70 patients, 37 (1.6%) LNs from 19 (27.1%) patients revealed MM. Micrometastases were seen in only group 1 and 2 LNs: none had group 3 and 4 LN involvement. The gender, age, tumor size, location of tumor, histologic type, differentiation, depth of invasion, lymphatic invasion, and c-erbB-2 expression were not significantly associated with MM status. The survival time of the MM-positive group (mean: 62 months) was significantly shorter than that of the MM-negative group (mean: 72 months) (p=0.046). The findings of this study indicate that the presence of MM in LNs is an important prognostic factor in AGC patients.
Humans ; Immunohistochemistry ; Keratins ; Lymph Nodes* ; Neoplasm Metastasis ; Neoplasm Micrometastasis*

Adenoid basal cell tumor of the prostate is a rare tumorous lesion that can be misdiagnosed as adenocarcinoma of the prostate. The malignant potential of adenoid basal cell tumor remains uncertain due to small number of reported cases. This 66-year-old man presented with symptoms of urinary tract obstruction. Under the impression of benign prostatic hyperplasia, a transurethral resection of the prostate (TURP) was performed. The patient was alive with no evidence of recurrence or metastasis 15 months after TURP. Microscopically, most of the lesions were composed of nodular collections of small nests of basaloid cells with peripheral palisading, and clusters of tumor cells forming cribriform pattern. Multiple areas of basal cell hyperplasia and atypical basal cell hyperpalsia were also observed. The coexistence of basal cell hyperplasia, atypical basal cell hyperpalsia, and adenoid basal cell tumor with cribriform pattern in this case supports a morphologic continuum from the benign hyperplastic lesion to malignant neoplasia.
Adenocarcinoma ; Adenoids* ; Aged ; Humans ; Hyperplasia ; Neoplasm Metastasis ; Prostate* ; Prostatic Hyperplasia ; Recurrence ; Transurethral Resection of Prostate ; Urinary Tract

The incidence of renal cell neoplasms has been increased in worldwide as well as in Korea. Even though the World Health Organization (WHO) Classification of renal tumors (2004) is currently used, new entities require to be added in the updated classification because of recent modification with our understanding of the molecular biology and different clinical behavior of new renal tumors. In this review, recently described tumors and candidate entities will be discussed. It is of importance to know these new entities for the proper diagnosis, treatment, and their prognosis.
Carcinoma, Renal Cell ; Classification ; Diagnosis ; Incidence ; Korea ; Molecular Biology ; Prognosis ; World Health Organization

Verumontanum mucosal gland hyperplasia (VMGH) is a relatively common benign proliferative lesion which was first described by Gagucas et al in 1995. VMGH is usually found in radical prostatectomy or transurethral resection specimens and rarely in needle biopsy specimens. The histologic feature of VMGH is characterized by well-circumscribed proliferation of small glands and thus VMGH may mimic low grade adenocarcinoma. We report a case of VMGH from a 61-year-old man. The lesion coexisted with prostatic adenocarcinoma on radical prostatectomy specimen. The lesion was a well circumscribed microacinar proliferation which was present between the openings of ejaculatory ducts. The acini consisted of two cell layers with inner secretory cuboidal epithelium and outer basal cell. Typically, the lumen contained many corpora amylacea. Nuclear pleomorphism, prominent nucleolus, or mitotic figure was not identified. Because of small gland proliferation of VMGH, this lesion can be confused with other small gland proliferative lesions, such as low grade adenocarcinoma, atypical adenomatous hyperplasia, basal cell hyperplasia, mesonephric hyperplasia, and nephrogenic adenoma. To avoid misdiagnosis of VMGH as carcinoma, one should be familiar with this lesion.
Adenocarcinoma ; Adenoma ; Biopsy, Needle ; Diagnostic Errors ; Ejaculatory Ducts ; Epithelium ; Humans ; Hyperplasia* ; Male ; Middle Aged ; Prostate ; Prostatectomy

No abstract available.
Prostatectomy* ; Prostatic Intraepithelial Neoplasia*

No abstract available.
Prostatectomy* ; Prostatic Intraepithelial Neoplasia*

Prostatic carcinoma is the most commonly diagnosed cancer in the United States in men. Prostatic carcinoma in Korean men is uncommon and accounts for less than 1% of total cancer: however, the incidence of prostatic carcinoma is continuously increasing. Several clinicopathologic parameters including stage, Gleason score, and serum PSA level have been widely accepted as well established prognostic factors. To study the clinicopathologic features of prostatic carcinoma in Korean men, 58 cases of prostatic carcinoma, which were diagnosed on radical prostatectony specimens at Asan Medical Center from Jan. 1993 to June 1998 (1993; 3 cases, 1994; 3, 1995; 6, 1996; 12, 1997; 24, 1998; 10), were evaluated. The prostatic carcinomas were divided into three groups according to Gleason score. Tumors with Gleason score 6 or lower, 7, and 8 to 10 were categorized as low-grade, intermediate-grade and high-grade tumor, respectively. The overall mean age of the patients was 62.6 years (range, 4 6~76 years); mean age was 65.4, 62.8 and 61.1 in low, intermediate and high-grade tumor, respectively (p>0.05). The overall mean serum PSA level was 38.6 ng/ml (range, 0.3~276.0 ng/ml); mean serum PSA level was 17.0, 29.0 and 60.9 ng/ml in low, intermediate and high-grade tumor, respectively (p=0.002). The mean T stage was 2.3, 2.4 and 3.1 in low, intermediate and high-grade tumor (p=0.001). The percentage of positive resection margin was 33.3, 50.0 and 91.0 % in low, intermediate and high-grade tumor (p=0.001). The overall presence of prostatic intraepithelial neoplasia (PIN) was 79.3 %; percentage of the presence of PIN was 100, 79.2 and 68.2 % in low, intermediate and high-grade tumor (p>0.05). As reported in the literature, our results indicated that Gleason score was a good predictor of stage and prognosis. The higher Gleason score, the more cases were with positive surgical margins, advanced pathologic stage, and high serum PSA level (p<0.05).
Adenocarcinoma* ; Chungcheongnam-do ; Humans ; Incidence ; Male ; Multiple Endocrine Neoplasia Type 1 ; Neoplasm Grading ; Prognosis ; Prostatectomy* ; Prostatic Intraepithelial Neoplasia ; United States

Prostatic carcinoma is the most commonly diagnosed cancer in the United States in men. Prostatic carcinoma in Korean men is uncommon and accounts for less than 1% of total cancer: however, the incidence of prostatic carcinoma is continuously increasing. Several clinicopathologic parameters including stage, Gleason score, and serum PSA level have been widely accepted as well established prognostic factors. To study the clinicopathologic features of prostatic carcinoma in Korean men, 58 cases of prostatic carcinoma, which were diagnosed on radical prostatectony specimens at Asan Medical Center from Jan. 1993 to June 1998 (1993; 3 cases, 1994; 3, 1995; 6, 1996; 12, 1997; 24, 1998; 10), were evaluated. The prostatic carcinomas were divided into three groups according to Gleason score. Tumors with Gleason score 6 or lower, 7, and 8 to 10 were categorized as low-grade, intermediate-grade and high-grade tumor, respectively. The overall mean age of the patients was 62.6 years (range, 4 6~76 years); mean age was 65.4, 62.8 and 61.1 in low, intermediate and high-grade tumor, respectively (p>0.05). The overall mean serum PSA level was 38.6 ng/ml (range, 0.3~276.0 ng/ml); mean serum PSA level was 17.0, 29.0 and 60.9 ng/ml in low, intermediate and high-grade tumor, respectively (p=0.002). The mean T stage was 2.3, 2.4 and 3.1 in low, intermediate and high-grade tumor (p=0.001). The percentage of positive resection margin was 33.3, 50.0 and 91.0 % in low, intermediate and high-grade tumor (p=0.001). The overall presence of prostatic intraepithelial neoplasia (PIN) was 79.3 %; percentage of the presence of PIN was 100, 79.2 and 68.2 % in low, intermediate and high-grade tumor (p>0.05). As reported in the literature, our results indicated that Gleason score was a good predictor of stage and prognosis. The higher Gleason score, the more cases were with positive surgical margins, advanced pathologic stage, and high serum PSA level (p<0.05).
Adenocarcinoma* ; Chungcheongnam-do ; Humans ; Incidence ; Male ; Multiple Endocrine Neoplasia Type 1 ; Neoplasm Grading ; Prognosis ; Prostatectomy* ; Prostatic Intraepithelial Neoplasia ; United States