**Modality:** Ultrasonography (Grayscale) **Anatomical Region:** Vulva / Perineal soft tissue **Description:** The image displays a grayscale ultrasound of the vulvar region. Centered within the field of view is a well-circumscribed, predominantly hypoechoic mass measuring approximately 2.9 × 2.5 × 2.1 cm. The internal echo texture of the lesion is heterogeneous, containing subtle internal echoes and areas of low-level echogenicity. **Characteristic Visual Features:** * **Margination:** The borders of the mass appear relatively distinct from the surrounding subcutaneous tissue. * **Echogenicity:** The lesion is hypoechoic compared to the adjacent fibroadipose tissue. * **Acoustic Features:** There is evidence of posterior acoustic enhancement, suggesting a fluid-filled or highly cellular cystic nature, often associated with lesions such as a Bartholin’s gland cyst or abscess. * **Artifacts:** Significant posterior acoustic shadowing is absent; however, lateral edge shadowing is visible at the margins of the mass. **Clinical Significance:** Findings are consistent with a localized vulvar mass or cyst. The appearance requires differentiation between inflammatory processes (e.g., abscess), benign cystic lesions (e.g., Bartholin's cyst), or solid soft tissue neoplasms.

This histopathology slide depicts a Bartholin gland cyst, a common vulvar lesion resulting from cystic dilation of the Bartholin (greater vestibular) gland or its duct due to ductal obstruction, often in the setting of prior infection. In this Hematoxylin and Eosin stained preparation, low-power examination reveals a dilated duct-like structure with an anechoic to mucinous luminal content, lined by a simple to transitional-type epithelium. The cyst wall contains scattered mucous glands embedded in fibrous stroma, reflecting residual glandular architecture. The surrounding vulvar stroma displays mild chronic inflammatory infiltrate and fibrosis, compatible with retention of secretions rather than suppurative abscess. The glands are located in the posterior-lateral vestibule behind the labia minora, and drainage occurs into the postero-lateral vestibular recess. Pathology confirms a benign lesion with no dysplasia or malignancy detected in this field. Clinically, Bartholin cysts present as a unilateral vulvar mass, often fluctuating in size, and can become painful if infected (Bartholin gland abscess). This histology underscores the importance of recognizing ductal obstruction with mucus retention and glandular mucin production. Therapeutically, management may include marsupialization or gland excision depending on size, recurrence, and suspicion of neoplasm. In educational and diagnostic contexts, this image aids training in vulvar histopathology, differential with abscess or neoplasm, and correlates with clinical vulvar swelling.

This clinical photograph displays a surgical examination of the vulva, identifying two distinct adjacent lesions classified as a collision tumor. The first lesion is located on the posterior aspect of the right labium majora, characterized by a 2.0 cm x 1.5 cm ulcerated area with significant anabrosis (surface erosion) and focal erythema, representing a poorly differentiated squamous cell carcinoma. Immediately adjacent is a second, larger mass associated with the Bartholin gland, appearing as a 3.0 cm x 2.0 cm well-circumscribed, solid, dark brown to black nodule with a smooth, expansile margin. This second component was histopathologically confirmed as an adenosquamous carcinoma. Surgical forceps and gloved hands are shown retracting the labial tissue to expose the lesions during the preoperative or intraoperative assessment. The visual highlights the morphological differences between primary vulvar squamous cell carcinoma (ulcerative) and Bartholin gland malignancies (solid, circumscribed mass), illustrating a rare clinical presentation associated with long-term high-risk HPV-16 and HPV-59 infection.