Mesenteric lymph nodes

Female patient, 23 years old, C/O vague abdominal pain -on and off- for long duration, not relieved by medical treatment. Abdominal exploration was done (photo intra-operative), showing multiple lesions in the ileum, separated by normal looking areas, enlarged mesenteric lymph nodes (biopsy), reddish peritoneal fluid (12 ml), and appendicectomy was done. Microscopically: multiple epithelioid granulomas with focal minimal caseation in lymph nodes. Fluid cytology; transudate with very few lymphocytes. Appendix: unremarkable.

Caecal Mass

Female patient, 30 years old, presented  with symptoms and signs of acute appendicitis. On surgery there is ceacal mass with perforation. Resection was done and sent for frozen section.

Parotid swelling (17)

41 years, male patient C/O enlarged pre-auricular swelling. O/E generalized lymphadenopathy.
Biopsy from parotid gland; shows diffuse pleomorphic infiltration by small and large lymphocytes, plasma cells , many eosinophils on a background exhibiting prominent capillary patten and scattered mitotic figuers.
 I'm thinking about angioimmunoplastic lymphoproliferative disease Vs peripheral T cell lymphoma. I asked for lymph node biopsy, but not yet available. what is your suggestions?

Colonic mass (16)

Male patient, 39 years C/O intestinal obstructive symptoms.
CT & colonoscopy show large polypoid mass--> biopsy
Colonoscopic biopsy shows only septic necrotic tissue.
Surgical resection was done and specimen was sent for frozen section.

Axillary Lymph Node (15)

Female patient, 50 years old, Rt. axillary lymph node ( no clinically detected other groups).
Grossly; large adherent nodes , but not matted, homogenous tan colored cut surface.
Microscopically; mostly diffuse infiltration, large irregular lymphocytes, high mitotic ratio, many plasma cells, some neutrophils, few RS-like cells (not typical). What is your suggestion?
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Gastric Tumor (14)

Male patient, 60 years old; Partial (subtotal) gastrectomy (histopathologyview.blogspot.com)