[Carcinoma with unknown primary site: Morphological diagnosis]

Area of Science:

• Oncology
• Pathology
• Medical Diagnostics

Background:

• Carcinoma of unknown primary site (CUPs) presents with metastatic dissemination, making the primary tumor difficult to identify via physical examination.
• Diagnosis of the primary tumor origin in CUPs often relies on postmortem examinations.
• Understanding metastasis characteristics is key to diagnosing CUPs.

Purpose of the Study:

• To review literature data on the postmortem diagnosis of CUPs.
• To explore the role of morphological characteristics of metastases in identifying the primary tumor.
• To assess the utility of immunohistochemical and molecular genetic methods in locating the primary focus of CUPs.

Main Methods:

• Literature review of postmortem diagnosis in CUPs.
• Analysis of morphological features of metastatic tumors.
• Evaluation of immunohistochemical diagnostic approaches.
• Assessment of molecular genetic methods for primary tumor identification.

Main Results:

• Postmortem studies significantly contribute to determining the primary site in CUPs.
• Morphological analysis of metastases provides clues to the primary tumor's origin.
• Immunohistochemistry and molecular genetics offer advanced tools for primary focus detection.

Conclusions:

• Postmortem diagnosis remains vital for understanding CUPs.
• A combination of morphological, immunohistochemical, and molecular genetic analyses enhances the ability to identify the primary tumor in CUPs.
• Further research into these diagnostic modalities can improve CUPs management.