Adenocarcinoma of the gallbladder is the most common gallbladder carcinoma. But lymphoid stroma in gallbladder carcinoma is one of the rarest presentations. A unique case of gallbladder adenocarcinoma with lymphoid stroma in a 47-year-old female is presented in this report. The surgically resected gallbladder demonstrated invasive adenocarcinoma with lymphoid stroma, though it was radiologically diagnosed as xanthogranulomatous cholecystitis. Adenocarcinoma was immunohistochemically positive for pancytokeratin (AE1/AE3), cytokeratin 7 (CK7), cytokeratin 20 (CK20), and carcinoembryonic antigen (CEA). Lymphoid stroma was positive for CD45, where B-cell zones were CD20 and CD79a positive, and T-cell zones were CD3 positive, with a larger T-cell subset being positive for CD4 than CD8. This is the fourth reported case of gallbladder adenocarcinoma with lymphoid stroma, which needs to be studied for pathogenesis, prognosis, and future therapy, if any.

Decidualized endometrial stroma is an uncommon finding in lymph nodes but is typically found in the setting of endometriosis where endometrial glands give a hint toward the diagnosis. On the other hand, endometrial stroma with no identifiable endometrial glands can be challenging to differentiate from metastatic squamous cell carcinoma. We report a case of a 22-year-old female who presented to our medical center as a known case of cervical squamous cell carcinoma. The patient desired future fertility and became pregnant. She was treated during her second trimester and underwent a radical cesarean hysterectomy at 37 weeks\' gestation with bilateral pelvic lymph node dissection. Resection showed residual moderately differentiated squamous cell carcinoma of the cervix with lymphovascular invasion. Two pelvic lymph nodes were found to have decidualized stroma. Immunohistochemistry was done to rule out metastasis and no metastatic carcinoma was identified in any of the lymph nodes. It is necessary to be aware of the possibility of decidualized stromal changes in pelvic lymph nodes to avoid misdiagnosis.

The literature on peristomal pyoderma gangrenosum (PPD) is scarce, and studies to date have included few patients. It is therefore difficult to determine the incidence of PPD, investigate risk factors, or evaluate the effectiveness of the different treatments available. We report on a series of 4 patients diagnosed with PPD at our hospital in 2013 and 2014, and review the clinical characteristics and responses to treatment. Three of the patients had inflammatory bowel disease and 1 had rectal cancer. Three patients responded favorably to initial treatment with 0.1% tacrolimus ointment (administered as monotherapy in 2 cases and combined with immunosuppressants in the other). However, on withdrawal of tacrolimus, the disease recurred in all 3 patients, requiring treatment reintroduction or modification.