International journal of surgical pathology

Primary vulvar clear cell carcinoma (CCC) is extremely rare. In this article, we report a primary vulvar CCC along with immunohistochemical and gene mutation analyses results and literature review to discuss the clinicopathological features…

The histology in cases of primary spontaneous pneumothorax is generally nonspecific, but a careful examination, taking into account clinical data, may reveal subtle tissue alterations leading to a specific diagnosis in cases that might othe…

BACKGROUND: In this study, we retrospectively evaluated cases of patients who had undergone appendectomy in our hospital and aimed to present the efficiency of diagnostic tests and demographic data of cases. Pathological reports were analyz…

Endometriosis in men is extremely rare with only a few cases reported in the English literature. Different theories have been proposed as to its origin. In this article, we describe the clinicopathologic features of 2 cases of endometriosis…

Endometrial stromal sarcoma is a rare uterine tumor associated with favorable outcomes despite its ability to recur and metastasize to distant sites. Most recurrences are local, being limited to the abdomen/pelvis, but distant metastases ca…

Ovarian clear cell adenofibroma is uncommon, and borderline clear cell adenofibroma (low malignant potential) is extremely rare. Borderline clear cell adenofibromas may represent the precursor lesion of clear cell adenocarcinoma of the ovar…

BACKGROUND: Umbilical lesions are rare, and can be benign or malignant. This retrospective study was conducted to assess the epidemiological, clinical, and histologic characteristics of umbilical masses. METHODS: Cases of umbilical masses …

Adenocarcinoma ex-goblet cell carcinoid is a very rare and histologically unique appendiceal malignancy with dual glandular and neuroendocrine differentiation. There is a high incidence of this tumor among middle-aged women with metastasis …

From 1861 to 1962, clinicopathologic research tried to explain the association of abnormal uterine bleeding with uterine enlargement. The etiology was theorized as metropathy, suggesting that myometrial dysfunction may predispose to abnorma…

Appendiceal or cecal endometriosis with intestinal metaplasia is uncommon and may mimic mucinous tumors of the appendix. A 50-year-old woman was found incidentally to have an ileocecal lesion. In the intraoperative histological examination,…

While endometriosis, defined as the presence of endometrial tissue in extrauterine sites, is most frequently encountered within the peritoneal cavity, a small but significant proportion of cases occur at extra-abdominal soft tissue sites, p…

Endometriosis affects 4% to 13% of all women of reproductive age although its true incidence is unknown. The ability of endometriosis to transform into malignancy, first described by Sampson in 1925, is a rare occurrence affecting 1% of les…

Peritoneum is a site for both primary and secondary tumors. Primary peritoneal tumors are fairly rare. The most common primary tumors of the peritoneum are malignant mesothelioma and serous papillary adenocarcinoma. Clear cell carcinoma of …

Extrauterine adenomyomas are extremely rare benign tumors of smooth muscles, endometrial glands, and endometrial stroma. Ectopic endometrial glands can undergo malignant change. The ovary is the most common site of malignant change in endom…

Male endometriosis and endomyometriosis (also termed "uterus-like mass") are 2 unusual manifestations of endometriosis. We report a case of male endomyometriosis with immunohistochemical and molecular confirmation. A 52-year-old man present…

BACKGROUND: Hepatic endometriosis/uterus-like mass is rare and may be overlooked during hepatic cyst workups. We report a case of uterus-like mass, misdiagnosed as hepatic abscess. CASE REPORT: A 47-year-old woman developed abdominal pain …

A placental site nodule is a benign proliferation of intermediate trophoblasts from a previous gestation that failed to completely involute. It is a rare entity that is often asymptomatic and is usually found incidentally weeks or even year…

Müllerian adenosarcomas most commonly arise in the uterine corpus from the eutopic endometrium. Occasionally, they arise in the cervix, vagina, broad and round ligaments, and ovaries and rarely in extragenital sites, usually in association …

Endometriosis is a common condition in women of reproductive age and has a known propensity to involve abdominal wall scars. The authors report 2 cases of endometriosis presenting as mass lesions involving the abdominal wall at the site of …

Aggressive angiomyxoma and endometriosis are two apparently unrelated lesions which commonly arise within the pelvis. However, whilst their simultaneous occurrence in this site may be fortuitous, a shared pathogenesis cannot be entirely exc…

Müllerianosis of the urinary bladder is a rare condition that encompasses 3 histological entities (endometriosis, endocervicosis, and endosalpingiosis). The authors report 2 patients with bladder müllerianosis, one of whom had endometriosis…

Endometriosis is well known for creating diagnostic pitfalls for pathologists. It may produce masses mimicking neoplasms or cause diagnostic quandaries, particularly when the patient age, location, and/or epithelial appearance are atypical.…

Endometrial carcinomas, particularly of endometrioid type, can invade the myometrium or cervix without eliciting a stromal desmoplastic or inflammatory response and have been referred to as diffusely infiltrating endometrial carcinomas. Thi…

Müllerianosis of the bladder is an infrequently described lesion consisting of multiple Müllerian-type tissues within the urinary bladder. Few previous cases of pure endosalpingiosis have been described. Here we present a 54-year-old post-m…