Peripheral blood smear from a patient with known chronic lymphocytic leukemia (CLL) showing autoimmune hemolytic anemia (AIHA). Brightfield microscopy of Wright-Giemsa stained smear at 1000x (oil immersion) reveals two dominant cell populations: numerous small mature lymphocytes typical of CLL and red blood cells showing spherocytic deformation. A smudge cell is evident just left of center, a classical clue for CLL. Red cells display reduced central pallor consistent with spherocytes, indicating intravascular or extravascular hemolysis driven by autoantibodies. The background shows mild polychromasia and rare nucleated RBCs, consistent with a robust reticulocyte response; the corrected reticulocyte count in this case is markedly elevated (>7%). Platelets are not significantly abnormal. These features collectively support autoimmune destruction of erythrocytes in the setting of CLL. Diagnostic significance lies in recognizing AIHA as a common autoimmune complication in CLL, with a clinical picture of sudden Hb decline and compensatory erythropoiesis. Differential considerations include drug-induced hemolysis, other causes of hemolytic anemia, or marrow infiltration by CLL. Clinical correlation includes therapy implications (steroids, rituximab) and close monitoring of hemolysis markers. This image is a valuable teaching resource for hematology morphology, AIHA in CLL, and differential diagnosis in anemia.

This composite image consists of clinical photographs and a diagnostic peripheral blood smear. Figure 1a (left) shows a pediatric patient with clinical signs including total alopecia (complete absence of scalp hair) and nail pitting affecting both hands and feet, characterized by small punctate depressions on the nail plates. Figure 1b (right) is a microscopic view of a peripheral blood smear demonstrating microangiopathic hemolytic anemia. Visible are numerous schistocytes—fragmented, irregular red blood cells including helmet cells and triangular forms—alongside some normal erythrocytes showing central pallor. The educational focus is on the multi-systemic manifestations of a medical condition, likely a microangiopathic process such as Hemolytic Uremic Syndrome (HUS) or similar systemic pathology, illustrating the correlation between dermatological signs (hair and nail changes) and hematological abnormalities (hemolysis and schistocytosis).

Peripheral blood smear prepared with Wright-Giemsa stain and examined under brightfield illumination using a 100× oil immersion objective reveals a single large plasma cell among a field of mature erythrocytes. The plasma cell displays features typical of clonal plasma cells: basophilic cytoplasm, an eccentrically placed round nucleus, and a conspicuous perinuclear hof; background shows rouleaux formation of red cells. This image exemplifies hematologic involvement by a plasma cell dyscrasia. In plasma cell leukemia, circulating plasma cells constitute more than 20% of leukocytes, a hallmark distinguishing it from conventional multiple myeloma, although both conditions share monoclonal plasma cell proliferation. The presence of circulating plasma cells is associated with younger patient age, higher incidence of anemia, thrombocytopenia, organomegaly, and possible lymphadenopathy; however lytic bone lesions may be less common. Immunophenotypic patterns often include lack of CD56 expression relative to myeloma. Clinically, this morphological finding warrants confirmation with complete blood count, peripheral smear review, quantitative plasma cell percentage, serum protein electrophoresis, and immunofixation to identify monoclonal immunoglobulin isotype (IgD/IgE or light-chain predominance). Early detection of circulating plasma cells supports prognosis assessment and guides therapy decisions in plasma cell dyscrasia management and monitoring, including risk stratification and treatment response evaluation for practice in clinics.

A comparative medical illustration detailing the effects of iron dysregulation on wound healing and systemic states. The left panel depicts a 'Low Iron' and 'Inflammation' scenario where a cutaneous wound is associated with 'Iron-deficiency anemia'. Key signaling molecules shown include TGF, IL-6, IL-8, and ECM components within a wound bed containing fibroblasts and matrix elements. An arrow indicates the downstream impact on the underlying epithelium and hemoglobin within the bloodstream. The right panel depicts an 'Excessive Iron' and 'Skin damage' scenario characterized by 'Excessive iron deposition'. This state is visually distinguished by an inhibitory symbol (red T-bar) directed at the epithelium, suggesting impaired regenerative capacity. Notably, the epithelium in the high-iron state contains yellow granules labeled as 'Iron-containing haematoxylin' (hemosiderin), which serve as a histological marker of iron overload. Both panels show the anatomical relationship between the cutaneous wound, underlying epithelial cells, and the intravascular space (bloodstream) containing red blood cells and hemoglobin, illustrating how iron homeostasis is critical for normal dermatological repair and systemic oxygen transport.

Peripheral blood smear from a patient with known chronic lymphocytic leukemia (CLL) showing autoimmune hemolytic anemia (AIHA). Brightfield microscopy of Wright-Giemsa stained smear at 1000x (oil immersion) reveals two dominant cell populations: numerous small mature lymphocytes typical of CLL and red blood cells showing spherocytic deformation. A smudge cell is evident just left of center, a classical clue for CLL. Red cells display reduced central pallor consistent with spherocytes, indicating intravascular or extravascular hemolysis driven by autoantibodies. The background shows mild polychromasia and rare nucleated RBCs, consistent with a robust reticulocyte response; the corrected reticulocyte count in this case is markedly elevated (>7%). Platelets are not significantly abnormal. These features collectively support autoimmune destruction of erythrocytes in the setting of CLL. Diagnostic significance lies in recognizing AIHA as a common autoimmune complication in CLL, with a clinical picture of sudden Hb decline and compensatory erythropoiesis. Differential considerations include drug-induced hemolysis, other causes of hemolytic anemia, or marrow infiltration by CLL. Clinical correlation includes therapy implications (steroids, rituximab) and close monitoring of hemolysis markers. This image is a valuable teaching resource for hematology morphology, AIHA in CLL, and differential diagnosis in anemia.

Peripheral blood smear prepared with Wright-Giemsa stain and examined under brightfield illumination using a 100× oil immersion objective reveals a single large plasma cell among a field of mature erythrocytes. The plasma cell displays features typical of clonal plasma cells: basophilic cytoplasm, an eccentrically placed round nucleus, and a conspicuous perinuclear hof; background shows rouleaux formation of red cells. This image exemplifies hematologic involvement by a plasma cell dyscrasia. In plasma cell leukemia, circulating plasma cells constitute more than 20% of leukocytes, a hallmark distinguishing it from conventional multiple myeloma, although both conditions share monoclonal plasma cell proliferation. The presence of circulating plasma cells is associated with younger patient age, higher incidence of anemia, thrombocytopenia, organomegaly, and possible lymphadenopathy; however lytic bone lesions may be less common. Immunophenotypic patterns often include lack of CD56 expression relative to myeloma. Clinically, this morphological finding warrants confirmation with complete blood count, peripheral smear review, quantitative plasma cell percentage, serum protein electrophoresis, and immunofixation to identify monoclonal immunoglobulin isotype (IgD/IgE or light-chain predominance). Early detection of circulating plasma cells supports prognosis assessment and guides therapy decisions in plasma cell dyscrasia management and monitoring, including risk stratification and treatment response evaluation for practice in clinics.

This composite image consists of clinical photographs and a diagnostic peripheral blood smear. Figure 1a (left) shows a pediatric patient with clinical signs including total alopecia (complete absence of scalp hair) and nail pitting affecting both hands and feet, characterized by small punctate depressions on the nail plates. Figure 1b (right) is a microscopic view of a peripheral blood smear demonstrating microangiopathic hemolytic anemia. Visible are numerous schistocytes—fragmented, irregular red blood cells including helmet cells and triangular forms—alongside some normal erythrocytes showing central pallor. The educational focus is on the multi-systemic manifestations of a medical condition, likely a microangiopathic process such as Hemolytic Uremic Syndrome (HUS) or similar systemic pathology, illustrating the correlation between dermatological signs (hair and nail changes) and hematological abnormalities (hemolysis and schistocytosis).

This is a high-resolution clinical photograph of a human fingernail demonstrating koilonychia, also called spoon nails. Imaging modality is clinical photography with macro/close-up technique to enhance surface and curvature details. The primary subject is the fingernail plate and surrounding nail folds, captured from a dorsal perspective for clear visualization of the nail curvature. The nail plate appears thin and concave, with a pronounced central depression producing a spoon-shaped contour. Lateral edges may be slightly tapered, and the distal third of the plate shows mild translucency. The surface is relatively smooth with minimal ridging, and the lunula is less conspicuous in this view. Surrounding cuticle and perionychial skin show mild erythema, possibly secondary to manipulation or irritation; no frank edema or pitting is evident. Clinically, koilonychia is a classic morphological clue associated with iron deficiency anemia and other nutritional or systemic disorders; in many cases nails become spoon-shaped due to chronic iron depletion. The diagnostic significance lies in recognizing a potentially reversible sign when iron stores are restored. This image is useful for dermatology, medical education, nursing training, and clinical scenario discussions focused on anemia screening, differential diagnosis of nail dystrophies, and patient education about nail changes as a diagnostic cue. Consider correlating with CBC and ferritin, and monitoring response to iron therapy.

This clinical photograph displays the dorsal surface of three fingers from a patient's hand, demonstrating koilonychia. The nails exhibit a classic 'spoon-shaped' deformity characterized by the loss of normal convexity, resulting in a flattened or centrally concave nail plate with raised lateral and distal edges. The nail plates appear thin and slightly pale, consistent with hypochromic states. The surrounding periungual skin and cuticles appear intact without significant inflammation, paronychia, or splinter hemorrhages. This finding is a pathognomonic physical sign often associated with chronic iron deficiency anemia (Plummer-Vinson syndrome) or other systemic conditions affecting keratinization. The image serves as an educational reference for identifying dermatological manifestations of hematologic disorders during a physical examination.

This clinical photograph displays the dorsal surface of both hands of a patient against a medical drape. The primary focus is the prominent nail pathology consistent with koilonychia (spoon nails). The fingernails exhibit a characteristic concave, upward-curving shape, appearing flattened or scooped out. Additionally, there is significant chromonychia characterized by brownish discoloration, with some nails showing hyperpigmented, dark areas near the distal and lateral margins. The nails appear thin and brittle in texture. An intravenous (IV) catheter is secured with white adhesive tape on the dorsum of the right hand, indicating an acute clinical setting. These physical findings are classic cutaneous markers of chronic iron deficiency anemia and are relevant to systemic conditions such as Plummer-Vinson syndrome. The image serves as a diagnostic educational resource for identifying dermatological manifestations of systemic hematologic disorders.

Peripheral blood smear from a patient with known chronic lymphocytic leukemia (CLL) showing autoimmune hemolytic anemia (AIHA). Brightfield microscopy of Wright-Giemsa stained smear at 1000x (oil immersion) reveals two dominant cell populations: numerous small mature lymphocytes typical of CLL and red blood cells showing spherocytic deformation. A smudge cell is evident just left of center, a classical clue for CLL. Red cells display reduced central pallor consistent with spherocytes, indicating intravascular or extravascular hemolysis driven by autoantibodies. The background shows mild polychromasia and rare nucleated RBCs, consistent with a robust reticulocyte response; the corrected reticulocyte count in this case is markedly elevated (>7%). Platelets are not significantly abnormal. These features collectively support autoimmune destruction of erythrocytes in the setting of CLL. Diagnostic significance lies in recognizing AIHA as a common autoimmune complication in CLL, with a clinical picture of sudden Hb decline and compensatory erythropoiesis. Differential considerations include drug-induced hemolysis, other causes of hemolytic anemia, or marrow infiltration by CLL. Clinical correlation includes therapy implications (steroids, rituximab) and close monitoring of hemolysis markers. This image is a valuable teaching resource for hematology morphology, AIHA in CLL, and differential diagnosis in anemia.

This composite image consists of clinical photographs and a diagnostic peripheral blood smear. Figure 1a (left) shows a pediatric patient with clinical signs including total alopecia (complete absence of scalp hair) and nail pitting affecting both hands and feet, characterized by small punctate depressions on the nail plates. Figure 1b (right) is a microscopic view of a peripheral blood smear demonstrating microangiopathic hemolytic anemia. Visible are numerous schistocytes—fragmented, irregular red blood cells including helmet cells and triangular forms—alongside some normal erythrocytes showing central pallor. The educational focus is on the multi-systemic manifestations of a medical condition, likely a microangiopathic process such as Hemolytic Uremic Syndrome (HUS) or similar systemic pathology, illustrating the correlation between dermatological signs (hair and nail changes) and hematological abnormalities (hemolysis and schistocytosis).

Comprehensive description: This is a brightfield, Wright-Giemsa stained peripheral blood smear examined by light microscopy at high magnification (oil immersion). The specimen shows several activated (atypical) lymphocytes in the peripheral blood, a hallmark of infectious mononucleosis. The lymphocytes have abundant basophilic cytoplasm and irregular, often indented nuclei with clumped chromatin and inconspicuous nucleoli. A normal segmented neutrophil is present for contrast. Erythrocytes exhibit occasional cytoplasmic membrane scalloping around red cells, a feature sometimes observed in EBV-related lymphocytosis. The background cytology is otherwise typical, with uniform erythrocytes and occasional platelets. The activated lymphocytes vary in size and cytoplasmic texture, some appearing plasmacytoid with vesicular basophilia, while others are more indented with coarse chromatin. These morphologic changes reflect an immune response to Epstein-Barr virus infection and are described as reactive lymphocytosis. Clinically, the combination of acute lymphadenitis, fever, a positive Monospot test, and EBV serology supports infectious mononucleosis. The image helps differentiate viral-induced lymphocytosis from bacterial lymphadenitis and from hematologic malignancies when integrated with clinical data. In summary, this smear illustrates the classical hematologic manifestation of EBV-associated mononucleosis. These atypical lymphocytes, sometimes named Downey cells, accompany fever and pharyngitis in EBV infection and aid differentiation from leukemia when combined with serology and clinical data.

Peripheral blood smear prepared with Wright-Giemsa stain and examined under brightfield illumination using a 100× oil immersion objective reveals a single large plasma cell among a field of mature erythrocytes. The plasma cell displays features typical of clonal plasma cells: basophilic cytoplasm, an eccentrically placed round nucleus, and a conspicuous perinuclear hof; background shows rouleaux formation of red cells. This image exemplifies hematologic involvement by a plasma cell dyscrasia. In plasma cell leukemia, circulating plasma cells constitute more than 20% of leukocytes, a hallmark distinguishing it from conventional multiple myeloma, although both conditions share monoclonal plasma cell proliferation. The presence of circulating plasma cells is associated with younger patient age, higher incidence of anemia, thrombocytopenia, organomegaly, and possible lymphadenopathy; however lytic bone lesions may be less common. Immunophenotypic patterns often include lack of CD56 expression relative to myeloma. Clinically, this morphological finding warrants confirmation with complete blood count, peripheral smear review, quantitative plasma cell percentage, serum protein electrophoresis, and immunofixation to identify monoclonal immunoglobulin isotype (IgD/IgE or light-chain predominance). Early detection of circulating plasma cells supports prognosis assessment and guides therapy decisions in plasma cell dyscrasia management and monitoring, including risk stratification and treatment response evaluation for practice in clinics.

This composite figure demonstrates clinical and diagnostic findings associated with Vitamin B12 deficiency (Subacute Combined Degeneration of the spinal cord). Image A is a clinical photograph of an 18-year-old male showing significant cutaneous hyperpigmentation of the distal upper extremities. The darkening is most pronounced on the dorsal surfaces of the hands and fingers, contrasting with the lighter skin tone of the proximal arms and chest. This is a common dermatologic manifestation of megaloblastic anemia. Image B is a sagittal T2-weighted MRI of the cervical and upper thoracic spine. It reveals a long-segment, linear intramedullary hyperintense signal within the posterior aspect of the spinal cord. This finding represents edema and demyelination characteristic of Subacute Combined Degeneration, which typically affects the posterior and lateral columns while sparing the anterior column. The combination of these visual findings—distal hyperpigmentation and longitudinal posterior cord hyperintensity—is highly suggestive of severe Vitamin B12 deficiency in the context of progressive paraplegia.

This composite of clinical photographs illustrates various patterns of cutaneous hyperpigmentation associated with megaloblastic anemia due to Vitamin B12 deficiency. Image 1A and 1D display the palmar surfaces of the hands, showing diffuse, brownish-black hyperpigmentation with prominent accentuation along the palmar creases. Image 1B focuses on the dorsal aspect of the hands, highlighting localized brownish-black pigmentation specifically over the knuckle pads and phalangeal joints. Image 1C depicts the dorsal aspect of the feet, exhibiting a similar diffuse, dusky, brownish-black discoloration across the skin surface. These dermatological findings are classic external markers of severe B12 deficiency and often present alongside systemic symptoms like pancytopenia and macrocytosis. The collection serves as an educational tool for recognizing the cutaneous manifestations of nutritional deficiencies and metabolic disorders in hematology and dermatology.

Clinical photograph comparison (Figure 4A and 4B) demonstrating the cutaneous manifestations of Vitamin B12 deficiency and its resolution following treatment. Image 4A (Pre-treatment): Palmar view showing diffuse, brownish-black hyperpigmentation with prominent accentuation along the palmar creases and longitudinal hyperpigmentation of the fingers. The knuckles exhibit characteristic darkening, a classic sign of megaloblastic anemia-associated pigmentary changes. Image 4B (Post-treatment): Dorsal view of the same patient's hands 12 weeks after initiating parenteral cyanocobalamin (Vitamin B12) therapy. There is a marked reversal of the hyperpigmentation, with the skin returning to a more uniform, lighter tone. The previously dusky knuckles and digits show significant clearing, and the nail beds appear healthy. This comparison serves as an educational tool for identifying dermatological markers of nutritional deficiencies and monitoring therapeutic response to Vitamin B12 supplementation.

Clinical photograph in two panels (A and B) demonstrating cutaneous hyperpigmentation associated with vitamin B12 deficiency. Panel A shows a lateral view of the head and neck, highlighting patchy, irregular melanoderma on the temporal region and cheek, with a mottled distribution across the scalp. The pigmentation ranges from light tan to dark brown and appears non-elevated and non-scaly. Panel B displays the dorsal surfaces of both hands, revealing generalized darkening with accentuated intensity over the knuckles and phalangeal creases. A proximal-to-distal gradient is visible on the fingers, with the most intense hyperpigmentation occurring proximally. These findings are characteristic of the mucocutaneous manifestations of megaloblastic anemia and vitamin B12 deficiency, serving as a critical clinical sign for differential diagnosis from Addison’s disease.