Collecting-duct carcinoma of the kidney with prominent signet ring cell features.

We report a case in a 74-year-old woman of collecting-duct carcinoma of the kidney with prominent signet ring cell features. Grossly, the tumor measured 5.5 cm in greatest dimension, occupied the entire upper pole of the kidney, and was well circumscribed. Microscopically, it displayed a predominant tubulopapillary pattern of growth with a hyalinizing stroma. The tumor tubules were lined by a single layer of cells with large, pleomorphic nuclei, some of which had a hobnail appearance. Large intracytoplasmic vacuoles with compression of nuclei (signet ring cells) were present throughout the tumor. Alcian blue, mucicarmine, and periodic acid-Schiff stains failed to identify intracellular mucin or glycogen in the signet ring cells. Enlarged cells with intracytoplasmic vacuoles were also noted in the adjacent collecting ducts. The tumor cells were immunohistochemically positive for cytokeratin including cytokeratin 7, CAM 5.2, AE1/3, and 34 beta E12, vimentin, peanut lectin agglutinin, and Ulex europaeus agglutinin. Electron microscopy revealed that the intracytoplasmic vacuoles were due to intracellular edema. To the best of our knowledge, this is the first reported case of renal collecting-duct carcinoma with prominent signet ring cell features.

Results of surgical treatment for abnormal penile curvature: Peyronie's disease and congenital deviation by modified Nesbit plication (tunical shaving and plication).

PURPOSE: We report a modification of the Nesbit plication with partial thickness shaving instead of conventional excision of a wedge of tunica albuginea. The technique minimizes intraoperative bleeding, obviates cavernous tissue damage and improves adhesion of plicated tunical layers. MATERIALS AND METHODS: Between September 1988 and September 1994, 32 patients underwent modified plication repair of chordee secondary to Peyronie's disease (26) or congenital penile deviation (6). The results were evaluated in the spring of 1996. RESULTS: Mean age plus or minus standard deviation was 55 +/- 8.8 years for patients with Peyronie's disease and 27 +/- 6.85 years for those with congenital penile deviation. Mean duration of Peyronie's disease was 22 +/- 9 months. Eight patients complained of erectile dysfunction and penile curvature. Plication for congenital deviation (6 patients) resulted in 100% satisfaction with the surgical result. Of the 26 men with Peyronie's disease 19 (78%) reported a good to excellent outcome. With prolonged followup (1 to 5 years) 7 patients had recurrent curvature due to progression of disease, including 5 with mild curvature who were able to have intercourse, in contrast with 2 who had severe early recurrence of deformity (more than 30 degrees) within 1 year postoperatively and underwent a second modified plication with good clinical outcome. Six of 32 patients with peyronie's disease were unable to resume satisfactory coitus with a postoperative straight penis. All 6 patients had concomitant poor erections preoperatively as shown by nocturnal peniletumescence and rigidity testing and 5 of them resumed regular intercourse with intracavernous pharmacotherapy. CONCLUSIONS: Long-term results of this modified plication demonstrate excellent clinical outcome with minimal morbidity.