Logothetis at MDA and his department are known for their work with rare types of PC.
This is such a rare disease that no one knows which therapy will work best, but some do appear to work. Here are some case studies from the Mayo Clinic that might give you hope...
Case study said...
A 51-year-old man presented with a history of a robotassisted radical prostatectomy (RARP) performed at an outside facility. He was found to have a Gleason 3+5=8, T3bN0MX adenocarcinoma with signet ring cell features and positive margins. The patient underwent a complete evaluation at the outside facility, including imaging and colonoscopy. However, only computed tomographic and bone scan findings were reviewed at our institution, which were negative for evidence of metastasis or for a primary tumor of a different origin. The patient underwent external-beam radiation therapy at an outside institution (dose unspecified) and is currently alive with no evidence of malignancy.
Case study said...
A 59-year-old man presented with an elevated PSA level of 4.8 ng/mL. He underwent a transrectal needle biopsy demonstrating a Gleason 4+4=8 adenocarcinoma with signet ring cell features (Figure). A thorough GI work-up was performed; cystoscopy ruled out metastasis or a primary tumor of a different origin. Physical examination demonstrated an enlarged gland, with minimal induration on the left. The patient underwent a RARP with bilateral pelvic lymphadenectomy. Final pathologic stage was Gleason 4+4=8, T2bN0M0 with signet ring cell features. The patient began receiving adjuvant hormonal therapy and will continue this therapy for 2 years.
Case study said...
A 67-year-old man who was being evaluated for a recurrent polyp in the hepatic flexure had abnormal findings on digital rectal examination. Biopsy of the prostate was performed, and pathology showed a Gleason 4+5=9 adenocarcinoma of the prostate with signet ring cell features involving 25% of the cores. The patient's pretreatment PSA level was 1.9 ng/mL. Other than the colonic polyp, no other evidence of malignancy was found on computed tomography, bone scans, and multiple colonoscopies. The patient elected to undergo hormone therapy while he underwent a right hemicolectomy for the polyp, which was found to be a tubular adenoma with high-grade dysplasia. The patient underwent external-beam radiation for a total dose of 7600 Gy in 38 fractions. After completing his radiation, he stopped his hormonal therapy. To date, he has no detectable PSA level.
Case study said...
A 67-year-old man underwent a retropubic radical prostatectomy in 1988 at an outside institution. Pathology demonstrated a grade 3 of 4, a Gleason 3+5=8, N0, M0, stage C adenocarcinoma of the prostate with signet ring cell features. The patient developed a PSA recurrence and was treated initially with leuprolide. Two years later, he had a PSA failure on androgen blockade and was referred to our institution. The patient underwent contrast-enhanced computed tomography, the results of which were normal. There was no record of a colonoscopy, and a bone scan at the time of consultation (4 years after prostatectomy) was positive for distant metastases. The patient continued taking leuprolide and remained asymptomatic at his last follow-up in 1993. The patient died 9 years after his initial diagnosis of unknown causes.