This histology image depicts colonic mucosa displaying villous adenomatous architecture with low-grade dysplasia. Prepared as a routine hematoxylin and eosin stained section, the villous processes are lined by columnar epithelium exhibiting architectural crowding, branching, and cryptal pseudostratification. There is hypercellularity with nuclear overcrowding; nuclei are moderately enlarged and elongated, hyperchromatic yet maintaining orderly polarity. Nucleoli are not prominent. Goblet cell mucin shows partial loss, contributing to a basophilic cytoplasmic appearance on H&E. Mitotic activity is not significantly increased, arguing against high-grade features. The mucosal glands demonstrate lack of maturation from crypt base to luminal surface, with vertical growth and irregular gland size; mucin depletion and basophilia accentuate the neoplastic epithelium. Overall, the lesion is an adenomatous polyp with villous architecture and low-grade dysplasia, a premalignant neoplasm in the colorectal tract. On imaging and clinical context this corresponds to a colon polyp with villous pattern, requiring complete endoscopic resection and histologic subtyping to determine malignant potential. Diagnostic significance includes risk stratification for progression to high-grade dysplasia or invasion; differential diagnoses include tubular adenoma with villous features, mixed adenoma, serrated lesions; clinical correlation: colonoscopy findings, patient age, and polyp burden inform management. Planning for surveillance is essential.

Juvenile polyp from the colon in juvenile polyposis syndrome is illustrated on a hematoxylin and eosin stained slide. The lesion arises from colonic mucosa and shows hamartomatous architecture with distorted, irregular glands embedded in an edematous lamina propria. The surface epithelium is dysplastic, displaying elongated, crowded glands with hyperchromatic, stratified nuclei and mild to moderate atypia, resembling tubular adenoma-type changes rather than a benign juvenile polyp alone. Glandular ducts are variably cystically dilated, and the mucosal stroma is expanded with edema and inflammatory infiltrate. Notable features include gland distortion, cystic dilation, and mitotic activity in dysplastic epithelium. This histology reflects the increased risk of adenocarcinomatous transformation in juvenile polyposis syndrome, either within a juvenile polyp or in concomitant adenomatous lesions. Clinically, these findings emphasize the cancer risk in JPS and the necessity for vigilant surveillance colonoscopy, genetic testing (SMAD4 and BMPR1A mutations), and risk stratification. The image captures the spectrum of neoplastic potential in JPS, where dysplasia signals progression toward colorectal carcinoma and may guide management, including therapeutic polypectomy, colectomy consideration, and targeted screening intervals in affected individuals. Correlation with clinical history, family testing, and endoscopic surveillance improves early cancer detection and informs therapeutic decision-making.

This clinical photograph shows a gross surgical specimen consisting of two tissue fragments excised during a polypectomy and endometrial curettage. The largest fragment is an elongated, pedunculated polyp measuring approximately 5.3 cm in length, as indicated by the adjacent surgical ruler. The polyp exhibits a fleshy, irregular surface with variegated coloring ranging from pale pink to deep red, suggesting vascular congestion or focal hemorrhage. Below the primary polyp is a smaller, fragmented piece of tissue, which appears more yellowish-white, translucent, and edematous, consistent with inactive endometrial curettings. The specimens are placed on a sterile white gauze over a blue surgical drape. This visual provides a gross pathological representation of a large endometrial polyp, a common cause of postmenopausal bleeding. The educational focus is on the morphology of benign endouterine growths and the distinction between a focal polypoid mass and diffuse endometrial tissue obtained through curettage.

This clinical endoscopic image depicts a hysteroscopic view of the uterine cavity. The primary finding is a large, focal endometrial polyp characterized by a pale, whitish, and raised appearance that contrasts with the surrounding darker, vascularized endometrial tissue. The surface of the polyp shows irregular morphology and areas of focal reddish discoloration, suggestive of localized hemorrhage or hypervascularity. This diagnostic image demonstrates a common benign growth that can cause abnormal uterine bleeding (AUB) or postmenopausal bleeding (PMB). The visualization highlights the high sensitivity of hysteroscopy in detecting focal endometrial pathologies compared to transvaginal ultrasound, particularly in identifying the size, location, and vascular characteristics of endometrial polyps.

A transvaginal diagnostic ultrasound image demonstrating a benign endometrial polyp in the longitudinal plane of the uterus. The B-mode greyscale imaging shows a well-defined, focal hyperechoic lesion with a regular outline situated within the endometrial cavity. The lesion exhibits homogeneous echogenicity, consistent with a solid polypoid structure. Superimposed color Doppler signals (red and blue) reveal a single prominent feeder vessel entering the lesion, which is a classic vascular pattern for a simple endometrial polyp. The surrounding endometrium appears morphologically normal without evidence of irregularity or multi-vessel vascularity. This image serves as an educational example of typical sonographic features used in gynecological imaging to distinguish benign polyps from suspected endometrial malignancies according to International Endometrial Tumor Analysis (IETA) criteria.

A multi-panel medical image featuring diagnostic imaging of the uterus in a 52-year-old postmenopausal patient. The left panel shows grayscale transvaginal ultrasound (TVUS) images of the uterus in a longitudinal plane. The endometrium is clearly identified, appearing thickened with a heterogeneous echotexture. Electronic calipers indicate an endometrial thickness measurement of 1.14 cm (11.4 mm). A blue arrow highlights a focal hypoechoic area within the thickened endometrial stripe, suggestive of a potential polyp or cystic change. The right panel displays a hysteroscopic view of the uterine cavity. The endoscopic perspective shows a pink, vascular endometrial lining with a prominent, irregular, white-to-tan protruding structure, characteristic of an endometrial polyp. These combined imaging modalities illustrate the evaluation of postmenopausal bleeding and endometrial thickening, which in this clinical case was histologically confirmed as a benign active endometrium.