European Society of Toxicologic Pathology (ESTP)
    European Society of Toxicologic Pathology
Guess What! - Solution Overview
Case 1
Case #1

Angiomatous hamartoma
Case 2
Case #2

Focal epithelial hyperplasia of neuroendocrine cells
Case 3
Case #3

Hyperplasia of interdigitating dendritic cells
Case 4
Case #4

Spontaneous epithelial plaques of the uterus in a non-pregnant monkey
Case 5
Case #5

Retinal Gliosis
Case 6
Case #6

Tubulostromal hyperplasia
Case 7
Case #7

Follicular cell carcinoma and C-cell adenoma
Case 8
Case #8

(Female) flank organ
Case 9
Case #9

Reactive proliferative change of vascular elements around the mid-ventral coccygeal artery due to impairment of venous return after intravenous injection
Case 10
Case #10

Unilateral Fordyce's granules of the upper molar gingiva in female Wistar rat
Case 11
Case #11

Fibrosis and chondroid metaplasia of the synovialis in response to thrombosis of (sub)synovial vasculatur
Case 12
Case #12

Cystic Echinococcosis, caused by Echinococcus granulosus
Case 13
Case #13

Benign schwannoma
Case 14
Case #14

Mature ovarian teratoma
Case 15
Case #15

Severe, diffuse mesangioproliferative glomerulonephritis (MPGN) with severe chronic tubulointerstial inflammation due to immune complex glomerulonephritis (ICGN); IgM/IgA-Nepropathy
Case 16
Case #16

Ovary: Unilateral Brenner tumor
Case 17
Case #17

Multifocal basal cell hyperplasia of the prostate and multifocal basal cell hyperplasia with squamous metaplasia of the vesicular gland.
Case 18
Case #18

Mediastinum: extragenital yolk sac carcinoma
Case 19
Case #19

Ear, Auricular chondritis (auricular chondropathy)
Case 20
Case #20

Tumor, hair follicle, benign; pilomatricoma type
Case 21
Case #21

Testicular fibrous hypoplasia
Case 22
Case #22

Granulomatous inflammatory process with abundant black (Indian ink) pigment
Case 23
Case #23

Osteogenesis imperfecta
Case 24
Case #24

Conventional histopathology:
Atrophy, cortex; Hyperplasia, lymphoid, medulla; Loss of corticomedullary distinction
Enhanced histopathology:
Lymphocytes decreased, cortex; lymphocytes increased, T-lymphocytes, medulla; Loss of corticomedullary distinction