MRI, enhanced CT, and FDG PET/CT in basal cell carcinoma of the prostate

Prostate Basal Cell Carcinoma: A Case Report

Prostate basal cell carcinoma (PBCC) accounts for 0.01% of all prostate cancers. A 68-year-old man complained of dysuria for 5 years on his initial visit. His PSA level was 3.87 ng/mL. Due to a diagnosis of benign prostate hyperplasia, he underwent transurethral resection of the prostate. A pathological examination revealed that basal cell-like atypical cells made alveolar with palisadal layout. Immunohistochemical analysis showed positive 34β12, P63, and Ki-67. Based on these findings, PBCC was diagnosed. Then, we performed radical prostatectomy. He was free from recurrence 22 months after the operation. We herein report an extremely rare case of PBCC.

Trichoepithelioma Arising in an Ovarian Mature Cystic Teratoma

Here, we report an extremely rare case of trichoepithelioma (TE)-a benign epithelial tumor originating from the outer root sheath of a hair follicle-arising in an ovarian mature cystic teratoma (MCT) with fluorodeoxyglucose-positron emission tomography (FDG-PET) findings. A 48-year-old Japanese woman presented to our hospital for her annual follow-up of adenomyosis. Ultrasonography and magnetic resonance imaging revealed a left ovarian tumor with irregular-shaped septum, which was suspicious of malignancy. However, tumor marker levels were within normal range. On FDG-PET, the maximum standardized uptake value (SUVmax) of the tumor was 2.9. Laparotomy with left salpingooophorectomy was performed. Pathologic examination revealed the probability of TE, rather than basal cell carcinoma (BCC), arising in an ovarian MCT. After five years of follow-up, the patient had no sign of recurrence. The FDG-PET SUVmax was low in TE, as with other benign tumor. However, future investigation is needed to evaluate the findings of FDG-PET imaging in TE cases.

Primary retroperitoneal mucinous cystadenocarcinoma (PRMCa): a systematic review of the literature and meta-analysis

PURPOSE

Primary retroperitoneal mucinous cystadenocarcinoma (PRMCa) is a rare tumour. Prognosis and optimal management are not well established. In view of a case managed in our Centre, we performed a systematic review and meta-analysis.

METHOD

Systematic review of medical electronic databases for published data (1950-12/10/2015). No RCTs identified. Individual patient data detracted from case reports and case series were analysed

RESULTS

In total, 73 female and 5 male cases of PRMCa identified including our case. Median age at diagnosis was 42.0 years (range 18-86 years), with women being significantly younger than men at diagnosis (42.0 years versus 62.2 years, p = 0.005). A palpable abdominal mass and abdominal pain were the most common presentations in 42.9 and 23.8 % of cases, respectively. Twenty-six women were <38 years old. There were 16 women <38 years old that had surgical data reported, of which 14 underwent fertility-sparing surgery with excision of the mass. Adjuvant chemotherapy was given in 24.1 % (13/72) women. Follow-up ranged from 1 to 130 months with a median of 15 months. Of the 57 cases that had follow-up reported, recurrence occurred in 23 cases (40.4 %) within a median of 8 months from diagnosis. Median disease-free survival was 15 months (range 1-130 months). Of the women who recurred, 14 died of their disease giving 1, 2 and 5-year disease-specific survival rates of 85.9, 80.7 and 75.4 %, respectively.

CONCLUSION

PRMCa are rare and potentially aggressive tumours that often occur in young women. Removal of the tumour, adequate staging and adjuvant chemotherapy needs to be considered.