The image above, likely from a lymphoid tissue aspirate or biopsy, demonstrates numerous atypical lymphoid cells with prominent cytoplasmic vacuolations. This morphology is most characteristic of which of the following conditions?

Explanation

## Image Findings * Numerous medium-sized, monomorphic atypical lymphoid cells. * Round to oval nuclei with finely dispersed chromatin and often prominent nucleoli. * Deeply basophilic cytoplasm. * **Prominent, clear cytoplasmic vacuoles** are a striking and widespread feature in many cells. * High nuclear-to-cytoplasmic ratio. ## Diagnosis **Key Point:** The presence of medium-sized, monomorphic lymphoid cells with deeply basophilic, **prominently vacuolated cytoplasm** is pathognomonic for **Burkitt Lymphoma**. Burkitt lymphoma is a highly aggressive B-cell non-Hodgkin lymphoma. The characteristic morphology on a smear or biopsy shows a monotonous population of medium-sized lymphoid cells. These cells typically have round to oval nuclei with finely dispersed chromatin and several prominent nucleoli. Crucially, the cytoplasm is deeply basophilic and contains numerous lipid vacuoles, which are clearly visible in the provided image. This cellular morphology, combined with a high proliferative index, is diagnostic. ## Differential Diagnosis | Feature | Burkitt Lymphoma | Acute Lymphoblastic Leukemia (ALL) | Diffuse Large B-cell Lymphoma (DLBCL) | | :---------------------- | :--------------------------------------------- | :--------------------------------------------- | :--------------------------------------------- | | **Cell Size** | Medium | Small to medium | Large | | **Cytoplasm** | Deeply basophilic, **prominent lipid vacuoles** | Scant, often agranular | Moderate to abundant, often irregular | | **Nucleus** | Round/oval, finely dispersed chromatin, 2-5 nucleoli | Round/convoluted, fine chromatin, inconspicuous nucleoli | Irregular, vesicular chromatin, prominent nucleoli | | **Mitotic Activity** | Very high | High | High | | **"Starry Sky"** | Classic (due to tingible body macrophages) | Not typical | Less common, but can be seen | ## Clinical Relevance **Clinical Pearl:** Burkitt lymphoma is strongly associated with **Epstein-Barr Virus (EBV)** infection, particularly in endemic (African) and immunodeficiency-associated forms. It presents as rapidly growing masses, often in the jaw (endemic form) or abdomen (sporadic form). ## High-Yield for NEET PG **High-Yield:** The **t(8;14) translocation** involving the *MYC* oncogene on chromosome 8 and the immunoglobulin heavy chain locus on chromosome 14 is the hallmark genetic abnormality in Burkitt lymphoma. Other translocations like t(2;8) and t(8;22) also occur. **Key Point:** The "starry sky" appearance on histology is due to scattered benign macrophages (tingible body macrophages) that have ingested apoptotic tumor cells, contrasting with the dense background of uniform tumor cells. ## Mnemonic **Mnemonic:** **B**urkitt's **L**ymphoma: **B**asophilic cytoplasm, **L**ipid **V**acuoles, **E**BV association, **M**YC translocation (8;14). ## Common Traps **Warning:** While the "starry sky" appearance is a classic histological pattern for Burkitt lymphoma, the **cytoplasmic vacuolations** are the key cellular morphological feature to identify on a smear or high-power view, as shown in this image. Do not confuse these lipid vacuoles with granules or Auer rods. ## Reference [cite:Robbins Basic Pathology, 10th Ed, Ch 13]